The Dragon Archive - User contributions [en]

Serial Numbers

2021-10-02T17:20:11Z

Dublevay:

{| class="wikitable"
|+ Dragon 32 Serial Numbers (White Label)
|-
! Serial Number !! Model !! Factory
|-
| 000349 DG || Dragon 32 || Swansea
|-
| 000943 DG || Dragon 32 || Swansea
|-
| 001776 DG || Dragon 32 || Swansea
|-
| 003300 DG || Dragon 32 || Swansea
|-
| 004524 DG || Dragon 32 || Swansea
|-
| 005464 DG || Dragon 32 || Swansea
|-
| 007632 DG || Dragon 32 || Swansea
|-
| 018343 DG || Dragon 32 || Swansea
|-
| 021235 DG || Dragon 32 || Swansea
|-
| 024397 DG || Dragon 32 || Swansea
|-
| 034062 DG || Dragon 32 || Swansea
|-
| 035488 DG || Dragon 32 || Swansea
|-
| 035688 DG || Dragon 32 || Swansea
|-
| 035722 DG || Dragon 32 || Swansea
|-
| 047598 DG || Dragon 32 || Swansea
|-
| 051493 DG || Dragon 32 || Swansea
|-
| 052194 DG || Dragon 32 || Swansea
|-
| 052845 DG || Dragon 32 || Swansea
|-
| 053007 DG || Dragon 32 || Swansea
|-
| 057333 DG || Dragon 32 || Swansea
|-
| 064870 DG || Dragon 32 || Port Talbot
|-
| 094662 DG || Dragon 32 || Port Talbot
|-
| 107235 DG || Dragon 32 || Port Talbot
|-
| 107656 DG || Dragon 32 || Port Talbot
|-
| 109635 DG || Dragon 32 || Port Talbot
|-
| 112306 DG || Dragon 32 || Port Talbot
|-
| 208013 DG || Dragon 32 || Port Talbot
|-
| 209509 DG || Dragon 32 || Port Talbot
|-
| 210479 DG || Dragon 32 || Port Talbot
|-
| 212734 DG || Dragon 32 || Port Talbot
|-
| 243249 DG || Dragon 32 || Port Talbot
|-
| 246870 DG || Dragon 32 || Port Talbot
|-
| 247566 DG || Dragon 32 || Port Talbot
|-
| 249678 DG || Dragon 32 || Port Talbot
|-
| 251378 DG || Dragon 32 || Port Talbot
|-
| 254481 DG || Dragon 32 || Port Talbot
|-
| 255254 DG || Dragon 32 || Port Talbot
|-
| 258711 DG || Dragon 32 || Port Talbot
|-
| 318363 DG || Dragon 32 || Port Talbot
|-
| 350581 DG || Dragon 32 || Port Talbot
|}

{| class="wikitable"
|+ Dragon 64 Serial Numbers (Yellow Label)
|-
! Serial Number !! Model !! Factory
|-
| 000078 LT || Dragon 64 || Port Talbot
|-
| 001215 LT || Dragon 64 || Port Talbot
|-
| 002081 LT || Dragon 64 || Port Talbot
|-
| 004860 LT || Dragon 64 || Port Talbot
|-
| 004948 LT || Dragon 64 || Port Talbot
|-
| 005572 LT || Dragon 64 || Port Talbot
|-
| 007682 LT || Dragon 64 || Port Talbot
|-
| 010931 LT || Dragon 64 || Port Talbot
|-
| 011781 LT || Dragon 64 || Port Talbot
|-
| 012284 LT || Dragon 64 || Port Talbot
|-
| 012512 LT || Dragon 64 || Port Talbot
|-
| 012556 LT || Dragon 64 || Port Talbot
|-
| 012752 LT || Dragon 64 || Port Talbot
|-
| 013264 LT || Dragon 64 || Port Talbot
|-
| 015707 LT || Dragon 64 || Port Talbot
|-
| 016566 LT || Dragon 64 || Port Talbot
|-
| 016950 LT || Dragon 64 || Port Talbot
|-
| 019151 LT || Dragon 64 || Port Talbot
|-
| 019189 LT || Dragon 64 || Port Talbot
|-
| 21142 DH || Dragon 64 || Port Talbot
|}

{| class="wikitable"
|+ Dragon 64 (EUROHARD) Serial Numbers (Red Label)
|-
! Serial Number !! Model !! Factory
|-
| 004900 EC || Dragon 64 || Caceres
|-
| 005216 || Dragon 64 || Caceres
|-
| 008778 || Dragon 64 || Caceres
|-
| 009403 || Dragon 64 || Caceres
|}

{| class="wikitable"
|+ Dragon 200 (EUROHARD) Serial Numbers (Blue Label)
|-
! Serial Number !! Model !! Factory
|-
| 002245 EC || Dragon 200 || Caceres
|-
| 002653 EC || Dragon 200 || Caceres
|-
| 003597 EC || Dragon 200 || Caceres
|}

{| class="wikitable"
|+ Dragon TANO Serial Numbers
|-
! Serial Number !! Model !! Factory
|-
| 002097 || Dragon 64 || New Orleans
|-
| 002912 || Dragon 64 || New Orleans
|-
| 004521 || Dragon 64 || New Orleans
|-
| 005529 || Dragon 64 || New Orleans
|}

Memory Map

2021-05-28T17:40:36Z

Dublevay: /* DIY PROJECTS */

== MEMORY MAP ==

DRAGON 32 and 64 in 32 mode

<pre> 0 - 1023 0000 - 03FF SYSTEM USE
1024 - 1535 0400 - 05FF TEXT SCREEN
1536 - 3071 0600 - 0BFF GRAPHICS: PAGE 1
3072 - 4607 0C00 - 11FF PAGE 2
4608 - 6143 1200 - 17FF PAGE 3
6144 - 7679 1800 - 1DFF PAGE 4
7680 - 9215 1E00 - 23FF PAGE 5
9216 - 10751 2400 - 29FF PAGE 6
10752 - 12287 2A00 - 2FFF PAGE 7
12288 - 13823 3000 - 35FF PAGE 8
13824 - 32767 3600 - 7FFF PROGRAM USE
32768 - 49151 8000 - BFFF BASIC ROM
49152 - 65279 C000 - FEFF CARTRIDGE USE
65280 - 65535 FF00 - FFFF INPUT/OUTPUT
</pre>

PLEASE NOTE:
With disks in use, the Disk work space occupies the first
page of graphics (1536 to 3071) and in consequence Graphics
screens are moved up one page, starting at 3072 (&H0C00) and
ending at 15359 (&H3BFF).
On start up the Dragon does a PCLEAR4 and in consequence the
memory available for program use starts at 7680, or 9216
with the DOS Controller in place.

DRAGON 64 in 64 MODE.

Same as above, except the BASIC ROM is moved from 32768
(&H8000) to 49152 (&HC000), which gives a substantial
increase in memory available for program use, but means that
disks cannot be used as the ROM overlays the Cartridge area.
Programs exist to overcome this problem however.

<pre>13824 - 49151 3600 - BFFF PROGRAM USE
49152 - 65279 C000 - FEFF BASIC ROM
65280 - 65375 FF00 - FF5F INPUT/OUTPUT
65376 - 65503 FF60 - FFDF SAM CONTROL BITS
65504 - 65535 FFE0 - FFFF MPU VECTORS</pre>

NOTE

The following pages contain details of the Dragon's memory,
both the Basic work pages and the Basic ROM. While every
effort has been made to ensure the accuracy of these
details, the Editor has had to rely on a number of sources
and it has not been possible to check them all.
Where possible details have also been given of the Tandy
Coco2 equivalent, making it possible for the conversion of
programs from American sources. In so doing you are reminded
that the Coco disk system differs greatly from Dragondos and
is closer to the cassette system in the way that it handles
data files.
One other major difference is the way that graphic binary
files are stored, they are usually 512 bytes higher in
memory than Dragon graphics.

== MEMORY MAP DETAILS ==
<pre>
0 0 BREAK message flag
1 1 STRING delimiting character
2 2 Another delimiting character
3 3 General counter
4 4 Count of IF's seen looking for ELSE
5 5 DIM flag
6 6 VARIABLE type flag 0=numeric 255=string
7 7 Garbage collection flag
8 8 Subscript allowed flag
9 9 INPUT/READ flag
10 A Arithmetic use
11) B) String pointer - first free temporary
12) C)
13) D) String pointer - last used temporory
15-24 E-18 Temporary results
25/26 19/1A Start address of Basic program
27/28 1B/1C Start address of simple variables table
see D User 1/86 p38 for details of
variables.
29/30 1D/1E Start address of ARRAY table
31/32 1F/20 End of storage (last byte used by Basic)
33/34 21/22 Top of Stack. ((Stack grows down)
35/36 23/24 Top of free STRING space. By subtracting the
contents of 33/34 you get free string space
37/38 25/26 Pointer to STRING in string space
39/40 27/28 Top of RAM available to Basic
41/42 29/2A Line number used in 'CONT' command
43/44 2B/2C Temp G.P. line number store
45/46 2D/2E Pointer to statement to be executed
47/48 2F/30 Direct mode command text pointer
49/50 31/32 Current DATA statement line number
51/52 33/34 Address of next item in current data sta'nt
53/54 35/36 Address of keyboard input buffer
55/56 37/38 Pointer to VARIABLE last in use
57/58 39/3A VARPTR address of variable last in use
59/78 3B/4E Evaluation variables
65/66 41/42 High end destination address for block move
67/68 43/44 High end origin address
69/70 45/46 Low end destination address
71/72 47/48 Low end origin address
79/84 4F/54 Floating Point Accumulator: No 1
79 4F Exponent )
80/83 50/53 Mantissa ) Details of FPA
84 54 Sign )
85 55 Temporary sign of FAC
86 56 String variable length
92/97 5C/61 Floating Pt Acc No 2: details as before
98 62 Sign comparison
99 63 Extended precision byte-Coco
104/105 68/69 Current line number (65535 in direct mode)
106 6A VDU Comma field width (default 16)
107 6B VDU Last Comma field (screen width - above)
108 6C VDU Current column number (0 - 31)
109 6D VDU Line width. No of characters per line
110 6E Cassette I/O flag. Set FF on input incurring
111 6F DEVN: re text output: 0=VDU 255=tape 254=prt
112 70 Cassette EOF flag: EOF reached if non zero
113 71 Restart flag. If<>$55 - cold start on reset
114/115 72/73 Restart vector. If flag=$55 & vector points
points to a NOP then warm start else
a cold start.
116/117 74/75 Physical end of RAM
120 78 Cassette status:0=closed 1=input 2=output
121 79 I/O buffer size
122/3 7A/B Header buffer address:where f'name block is
124 7C Cassette block type:
0=f'name block 1=data block 255=EOF marker b
125 7D BLKLEN:Cass Block length:Bytes to read/write
126/7 7E/F Cassette I/O buffer address
128 80 Used internally to calculate the checksum
129 81 I/O error code 1=CRC 2=attempt load into RAM
130/2 82/4 Temp store used by COS
133 85 Last sine value
134 86 Data for Lo-res SET/RESET routine
135 87 ASCII code of last key pressed
136/7 88/89 Current VDU cursor address (ie screen pos)
138/9 8A/B G.P. (16 bit) scratch pad
140 8C Sound pitch value (frequency)
141/2 8D/E GP Countdown facility (?duration of sound)
143 8F Cursor Flash Counter
144/5 90/1 Cassette leader byte count (number of &H55s)
146 92 Min Cycle width of 1200HZ - Init=12
147 93 Min Pulse width of 1200HZ - Init=0A
148 94 Max pulse width of 1200HZ - Init=12
149/50 95/6 Dragon - Motor on delay
Coco - Serial printer Baud rate constant
HEX Msb Lsb (decimal) Baud
149 150
02EB 2 235 75
01CA 1 202 120
0173 1 115 150
00BE 0 180 300
0057 0 87 600 (default)
0028 0 41 1200
0012 0 18 2400
0006 0 6 4800
0001 0 1 9600
151/2 97/8 Keyboard Scan Delay constant: Init=&H045E
153 99 Printer Comma Field Width: Default 16
154 9A Printer Last Comma Field
155 9B Printer Line Width: Set this to width 80?
156 9C Printer Head Column:same as POS(-2) in basic
157/8 9D/E Exec Entry address
159/170 9F/AA Self modifying routine which reads next char
166/7 A6/7 Address of current sig byte - next char pntr
171/4 AB/E Used by RND command
175 AF TRON/TROFF flag: Non zero - trace on
176/7 B0/1 Address os start of USR address table
178 B2 Current foreground colour
179 B3 Current Background colour
180 B4 Temp colour in use
181 B5 Byte value for current colour: ie bits set
182 B6 Graphics PMODE number in use.
183/4 B7/8 Address of LAST byte of current graphics
185 B9 Number of bytes per line in current PMODE
186/7 BA/B Address of FIRST byte: current graphics disp
188 BC Start of graphics pages (MSB) defaults to 06
Changed to 0C by Dragondos
189/90 BD/E Current X Cursor position (not available
191/2 BF/C0 Current Y Cursor position (n.a.)
193 C1 Colour Set currently in use
194 C2 Plot/Unplot flag:0=Reset, Non-zero=Set
195/96 C3/4 Current Horizontal Pixel number
197/8 C5/6 Current Vertical Pixel number
199/200 C7/C8 Current X cursor co-ordinate
201/2 C9/CA Current Y cursor co-ordinate
203/4 CB/CC Circle command X co-ordinate
205/6 CD/CE Circle command Y co-ordinate
207/8 CF/D0 RENUMber increment value
209/10 D1/2 RENUMber Start line (original number)
211/2 D3/4 CLOADM: 2's complement load offset value
213/4 D5/6 RENUMber New Start line (new number)
215 D7 Editor line length - not user available
216/221 D8/DD Graphics use
222 DE Current octave in use (0 - 4)
223/4 DF/E0 Volume data for volume setting in PLAY
225 E1 Current note length in PLAY
226 E2 Current TEMPO for PLAY command
227/8 E3/4 Music duration count
229 E5 Music dotted note flag
230 E6 Coco - Baud rate constant
231 E7 Coco - Input timeout constant
232 E8 Current ANGLE used in DRAW routine
233 E9 Current SCALE used in DRAW routine
234 EA Disk operation code-what operation specified
235 EB Disk Drive number(1 - 4) Coco(1 - 3)
236 EC Disk read/write TRACK number
237 ED Disk read/write SECTOR number
238/9 EE/F Disk read/write Sector Buffer address
240 F0 Disk Error Status byte (Convt to DDOS code)
241 F1 Disk File Control Block number (1 - 10)
242 F2 Number of bytes in Disk buffer area
243 F3 No of bytes to transfer to/from buffer
244 F4 Number of SIDES/TRACKS for current drive
00=1 side 40 tracks 01=2 sides 40 tracks
FF=1 side 80 tracks FE=2 sides 80 tracks
The FORMAT of a disk is taken from the last
few bytes of Sector 1 of Track 20 in Drogon
DOS, on first access of disk after switch on
or RESET.
245 F5 File Read/write flag
0=read, 1=write & FF=verify
246 F6 Disk I/O in progress flag
256/8 100/2 SWI3 JUMP VECTOR - called from &HFFF2
Execution of a SWI3 instruction of &H113F
will stack Registers and jump here
259/61 103/5 SWI2 JUMP VECTOR - called from &HFFF4
Execution of a SWI2 instruction of &H103F
will stack registers and jump here
262/4 106/8 SWI1 JUMP VECTOR - called from &HFFFA -&H3F
will stack registers and jump here
265/7 109/B NMI JUMP VECTOR -non-maskable interrupt
called from &HFFFC, set to &H7ED7AE JUMPD7AE
by initialisation of disk operating system
in the Coco. Okay for Dragon?
268/70 10C/E IRQ JUMP SECTOR - Interrupt request called
from &HFFF8. Set to &H7EA9B3 to initialise
Basic, Set to &H7E894C for initialisation of
extended Basic or set to &H7ED7BC for the
initialisation of DOS in the Coco.
271/3 10F/111 FIRQ JUMP VECTOR - Fast interrupt request
called from &HFFF6, set to &H7EA0F6 by the
initialisation of Basic and causes a jump to
the Cartridge Port in the Coco.
274/6 112/4 In Coco this is EXEC of USR basic function
274/5 112/3 Timer - current value of system timer
In both Dragon and Coco (double function)
277/81 115/9 Random number seeds used in RND function
282/7 11A/F Unused in Dragon
282 11A Coco - Caps lock 1=lock 0=unlock (lower case
283/4 11B/C Coco - keyboard delay constant
285/7 11D/F Coco - Vector to 45509 (JUMP $8489)
288 120 Number of Basic commands (reserved words)
289/90 121/2 Address of list of Basic commands
291/2 123/4 Address of Command Despatch Table
293 125 Number of Basic functions
294/5 126/7 Address of list of Basic functions
296/7 128/9 Address of Function Despatch Table
298/307 12A/133 As for 288 to 297, but in Dragon refers to
Disk commands and functions, but in the Coco
to Extended Basic commands and functions.
308/317 134/13D These addresses as above re COCO disks.
308/327 134/147 DRAGON - USR Table (20 bytes 2 each USR)
This USR table is switched to 1667 to 1686,
or Hex 683 to 696 when DOS is connected and
is replaced with Disk Stub3 which acts as a
terminator.
328 148 PRINTER AUTO LF/CR Flag
329 149 Dragon - Caps Lock flag:non zero=upper case
330 14A Number of chars in end of line sequence(1-4)
331/4 14B/E End of Line Characters: Set to CR/LF/NUL/NUL
This sequence is sent to printer when a
carriage return is output.
336/45 150/9 Dragon Keyboard 'Roll-over' table
338/45 152/9 Coco Keyboard 'Roll-over' table
</pre>

DRAGON/COCO KEYBOARD ROLLOVER TABLE
<pre>
Response:
Address 191 223 239 247 251 253 254
Dec Hex D C D C D C D C D C D C D C
338 152 ENT ENT X 8 P 0 H X @ P 8 H 0 @
339 153 CLR CLR Y 9 Q 1 I Y A Q 8 I 1 A
340 154 BRK BRK Z : R 2 J Z B R : J 2 B
341 155 ; S 3 K C S ; K 3 C
342 156 , T 4 L D T , L 4 D
343 157 - U 5 M E U - M 5 E
344 158 . V 6 N F V . N 6 F
345 159 SPC / W 7 O SPC G W / O 7 G
</pre>
RESPONSE IS 255 OR &HFF IF NO KEY IS PRESSED
<pre>
346 15A Right Joystick(0) - X value
347 15B Right Joystick(1) - Y value
348 15C Left Joystick (2) - X value
349 15D Left Joystick (3) - Y value

350 to 424 15E to 1A8 RAM HOOKS (each 3 bytes)
350/2 15E/160 Device Open- called just before OPEN command
353/5 161/3 Device Number-called when a DEVN is verified
356/8 164/6 Device Initialisation- called before setting
up the Device parameters in Loctn 106 to 109
359/61 167/9 OUTPUT CHAR TO DEVN:called just before out-
putting char in A Reg to DEVN
362/4 16A/C INPUT CHAR FROM DEVN: called just before
inputting a char from DEVN into A Register
365/7 16D/F INPUT FILE: called just before inputting a
file using INPUT
368/70 170/2 OUTPUT FILE: called just before outputting
to a file using PRINT
371/3 173/5 CLOSE ALL FILES: called before all files are
closed, action only taken if Cassette open
374/6 176/8 CLOSE FILE: called before device is CLOSED
action only taken if DEVN is -1 (tape)
377/9 179/B COMMAND INTERPRETER: called before interpret
of token in A Reg as command, used by Delta
380/2 17C/E RE-REQUEST INPUT. Called before requesting
more data from keyboard- ie before ?? prompt
383/5 17F/181 CHECK KEYS. Called before keyboard scanned
for BREAK and SHIFT/@. Keyboard not scanned
if DEVN is -1.
386/8 182/4 LINE INPUT FILE. Called before Line Input is
executed on current DEVN
389/91 185/7 CLOSE FILE & COMMAND. Called before closing
an ASCII file just read in as a Basic prog'm
by CLOAD & returning to COMMAND mode.
392/4 188/A CHECK EOF. Called before checking for EOF
for current DEVN
395/7 18B/D EVALUATE EXPRESSION. (obvious)
398/400 18E/190 USER ERROR TRAP. Can be patched by the user,
that is in Basic, to trap error messages.
401/3 191/3 SYSTEM ERROR TRAP. Can be patched by the
'system', ie Basic extension ROMs to trap
errors (used by Dragondos)
404/6 194/6 RUN LINK. Called when RUN command is about
to be executed. Patched by DDOS to allow a
disk filename to be specified.
407/9 197/9 RESET BASIC MEMORY. Called from two routines
in ROM before Basic Memory vectors are
changed, ie by entering or editing lines,
running programs etc.
410/2 19A/C GET NEXT COMMAND. Called before reading in
the next Basic command to be executed while
program is running.
413/5 19D/F ASSIGN STRING VARIABLE. (obvious)
416/8 1A0/2 SCREEN ACCESS. Called before the CLS,GET and
PUT commands are executed.
419/21 1A3/5 TOKENISE LINE. Called before an ASCII line
is tokenised in internal Basic format
422/4 1A6/8 DETOKENISE LINE. Called before a Tokenised
line is converted to ASCII characters
425/464 or 1A9/1D0 STRING BUFFER AREA
465 1D1 Cassette filename length
466/73 1D2/9 Cassette filename to search for/or write out
474/728 or 1DA/2D8 CASSETTE FILE DATA BUFFER
Area of memory used to load filename block &
ASCII data blocks - if this contains a file-
name block then this can be peeked (474-488)
474/81 1DA/1E1 Cassette filename (in buffer)
482 1E2 File type: 0=token basic 1=ASCII 2=binary
483 1E3 ASCII flag: 0=binary, non-zero=ASCII files.
484 1E4 Gap flag: 1=continuous, 255(FF)=gapped files
485/6 1E5/6 Execution address of machine code file
487/8 1E7/8 Load address of ungapped machine code file
729/33 2D9/C Basic line input buffer preamble
734/984 2DD/3D8 Basic line input buffer
985/1002 3D9/EA BUFFER space
1003/20 3EB/3FC Unused
1021/2 3FD/E End of line delay - RS 232 port on D64
1023 3FF D64 RS 232 port Baud rate controller port
1024) 400) TEXT SCREEN
1535) 5FF) Default area.
</pre>
The Coco Buffer areas are slightly different:
733/988 2DD/3DC 255 byte Keyboard buffer
737/827 2E1/33B 90 byte Screen buffer

The Disk Work area is from 1536 to 3071, or &H0600 to &H0BFF
Otherwise if disks are not installed these addresses are in
respect of the first of the Graphic pages, but with the DOS
installed the Graphics page 1 starts at 3072 (&H0C00).

== DRAGONDOS WORK SPACE ==
<pre>
1536 0600 Start of Disk work space or Graphics Page 1
when Disk cartridge not installed
1541 0605 Countdown to Disk motor off: Off when zero
1544 0608 Auto Verify ON/OFF: 0=off else checks sector
1546 060A Current Default drive No. Used when no Drive
number is specified in the command
1549/50 060D/E Auto command line number in use
1551/2 060F/10 Auto command increment value
1553 0611 Program LOAD/RUN flag: 0=Load else Load/RUN
1555 0613 Auto command ON/OFF flag: 0=off else Auto on
1556 0614 Error command ON/OFF flag: 0=off else ERR on
1557/8 0615/6 ERROR trap line number: Basic line error rtn
1559/60 0617/8 ERL: line number of last error
1561 0619 ERR: Error code of last basic error
1562/3 061A/B Address of start of statement in error
1564/9 061C/21 Drive 1 details
1570/5 0622/7 Drive 2 details
1576/81 0628/D Drive 3 details
1582/7 062E/33 Drive 4 details
1588) 0634) Disk Buffers 1 to 4 details, 7 bytes each
1615) 064F)
1616/66 0650/82 Current Drive information
1618/9 0652/3 Start address of program loaded
1620/1 1654/5 Length of program loaded
1622/3 1656/7 Entry (EXEC) address of M/code program
1667/86 1683/96 USR Vector table: relocated from 308-327(dec
1687 to 1706) Disk Drive Parameter table
0697 to 06AA) 4 bytes per parameter - 1 for each drive
1687/90 0697/A On Line Flag: Non zero means dive on line
1691/4 069B/E Current Track, if Drive on line
1695/8 069F/A2 Head Stepping rate: This should only be
changed if slower drives are used.
1699/702
06A3/6 Disk Tracks on each drive
1703/6 06A7/A Disk Sectors per track on each drive
1707/24 06AB/BC Directory Sector status
1725/2034 File Control Blocks: 10 in all: One for each
6BD/7F2 open file: Each FCB 32 bytes long
2035/47 7F3/F Temporary variables
2048/3071 )Disk Buffers: 4 in all, each 256 bytes long
800/BFF)

3072 0C00 Start of Graphic Page 1 when disks in place
otherwise start of Graphic Page 2 for tapes.
</pre>

== BASIC INTERPRETER CODES ==
<pre>
32768 8000 Hardware initialisation
32771 8003 Software initialisation
32774 8006 POLCAT:Keyboard input:put into Register A
32777 8009 Cursor Blink
32780 800C CHROUT:Write character in Reg A to screen
32783 800F Writes out character in Reg A to printer
32786 8012 Joystick input:stored in addresses 346/9 dec
32789 8015 Cassette on
32792 8018 Cassette off
32795 801B Write leader to cassette (or A00C)
32798 801E Output byte from Reg A to cassette
32801 8021 CSRDON:Cassette on, prepare for reading
32804 8024 Input one byte from cassette to Register A
32807 8027 Gets one bit in from cassette into carry
32810 802A Reads in a byte from another computer
32813 802D Sends a byte to another computer
32816 8030 Select Baud rate of communications line
</pre>
From here on the Coco equivalents are given in brackets and
only a few Hex addresses will be given
<pre>
33604 (44102) SYSERR: Generates appropriate action for
Error code in B Reg
33649 (44147) CMDMODE: prints OK prompt & returns to the
command mode
33773 (44271) BASVECT2: complete initialisation process
after Basic program loaded
33815 (44313) NEW Basic:removes current Basic program from
memory, resets stack & clears variables
33823 (44321) BASVECT1: Sets up various necessary vectors,
once a Basic program has been loaded
33844 (44339) RESETS STACK: Resets stack to initial position
all entries are lost
33951 (44446) RUN BASIC: runs a basic program in memory,
used to AUTORUN programs
34091 851B (44539) WAIT KEY: waits for a key press, and
when key pressed puts it in A Register
34935 (45382) GET EXPR: routine will evaluate & put VARPTR
address of following expression into 82/83
34951 (45398) GET STRG: compiles a string and puts it into
free string space
35236 (45671) CKCLBRAK: as for CKCOMA, but checks for a
closed bracket
35239 (45674) CKOPBRAK: as for above, but checks for an
open bracket
35242 (45677) CKCOMA: Checks to see next significant char
in command line is a comma, and if not it
produces a SYNTAX error
35244 (45679) CKCHAR: as for CKCOMA, but checks for char
in B Register
35476 (45911) GETVAR: Get VARPTR address of the follwing
variable's name
35625 (46057) GETUSR: Returns value of the argument in the
USR function as 16 bit number in D register
35632 INTCNV: pass parameters to M/code routine
35641 GIVABF:used to pass values from M/C to Basic
35893 (46322) ASSIGN-16-BIT:assigns value in D Register to
a numeric variable
35894 (46323) ASSIGN-8-BIT:assigns value in B register to
a numeric variable
36055 (46481) GARBAGE COLLECT: forces a controlled garbage
collection of string space
36255 (46681) DELVAR: frees space taken by a variable
36433 (46859) GET-8-BIT: returns value of the following
number in B Register
36483 (46909) GET-16-BIT: returns value of the following
number in X register
36522 (46948) LIST BASIC: lists basic program in memory to
to DEVN (device specified)
37025 90A1 (47448) PRINT CR/LE: moves cursor position
to start of a new line
37093 90E5 (47516) OUT STRING:Outputs a text string to
device number in DEVN
38266 957A (48588) PRINT NUMBER:outputs 16 bit number
in D Reg to DEVN
38798 978E RANDOM NUMBER: Generates an 8 bit random
number and puts it in location 278
39998 (34830) ASSIGN-16-BITB:alternative to 35893, assigns
value in Locs 82/83 to a variable
41194 A0EA (36038) WAIT WITH CURSOR:scans keyboard for
a keypress, flashing cursor at print pos.
43207 (38201) CLEAR GRAPHICS:clears current graphics
screen to data in B Register on entry
43304 (38298) SET COLOURS: sets up locations 180 & 181
43320 (38314) SELECT DISPLAY: Selects text or graphics
depending on Z condition code, if Z=1 text
43322 95AC (38316) RESET VDU: resets default VDU mode
43401 (38395) SET VDG MODE:sets VDG in mode given in A Reg
43421 (38415) SET VDG OFFSET: sets display offset for the
graphics mode
43428 (38422) SELECT VDG COL: selects required VDG colour
set from the data in location 193
43489 (38483) SELECT PAGE: on entry B reg contains page no
43536 (38530) SELECT COL SET: selects colour set 0 or 1,
according to data in B reg
43555 (38549) RESERVE HRG RAM: reserves RAM for graphics
and moves basic if necessary
44698 (39639) PLAY NOTE: A Reg contains ASC code of note,
other parameters should be set up
45137 (40118) DRAW:allows access to all facilities of DRAW
46004 (40999) RESET:resets whole works, as if reset button
has been pressed
46080 (41142) BOOT BASIC: restarts the Basic interpreter
as if on power up or reset
46410 B54A (41602) OUTCHAR:outputs character in A Reg
to device number in DEVN (location 111)
46687 (42029) CLOSE FILES: closes any open tape stream and
flushes buffer
46757 (42089) WRITE BASIC: writes current basic program to
cassette
46920 (42257) READ BINARY: reads in BIN file from tape
47283 (42625) FIND FILE: searches tape for matching filename
47411 (42753) READ 1ST BLOCK:gets filename block into tape
buffer
47422 B93E (42763) BLKIN: reads a block of data into
cassette buffer
47505 (42981) WRITE 1ST BLOCK: (obvious)
47513 B999 (42996) BLKOUT: write block of data to tape
47583 (43149) SET LRG LEVEL:on entry the X Reg contains
Lo-res screen address, B Reg colour & loc184
the OR data
47623 (43189) RESET LRG PIXEL:as above but B Reg ignored,
Pixel reset to Black
47656 (43225) CALC PIXEL POS:on entry the top of stack
must contain Lo-res vertical co-ordinate,
preceded by horizontal co-ordinate
47735 BA77 (43304) CLEAR SCREEN: clears screen to space
and 'homes' cursor
47737 BA79 (43306) CLEAR SCREEN to CHR: clears screen
to character in B Reg
47776 (43345) BEEP:sound Beep for length held in B Reg and
pitch set by location 140
47811 (43380) AUDIO OFF: disables sound:clears bit 3 65315
47813 (43382) ENABLE SOUND: enables 6 bit sound by setting
Bit 3 of 65315
47828 (43397) RESET D/A: Puts value $7E into D/A converter
address
47830 (43399) WRITE D/A: puts contents of A Reg into D/A C
47852 (43421) AUDIO ON:on entry the B Reg must be zero
48000 BB80 BOOT BASIC64K: Boots 64 mode
48053 BBB5 (41369) UPDATE CURSOR: flashes cursor
48101 BBE5 (41409) POLCAT: scans keyboard and puts the
character in A Register
48288 BCA0 (41763) CLEAR VDU LINE: clears current VDU
line from the cursor position
48299 BCAB (41738) VDU OUT: prints char in A Reg to VDU
48373 BCF5 PRINTER DIR OUT: char in A Reg sent printer
48394 BD0A PCRLF:moves print head to start of next line
48410 BD1A (41663) PRINTER OUT:Char in Reg A to printer
48449 (43426) SELECT JSK:selects joystick sources (ports -
0 - 3) from A Register
48466 BD52 (43486) READ JSKS: Updates all joystick data
locations (346/9)
48549 BDA5 (42837) BIT IN:reads a single bit(see below)
48557 BDAD (42825) BYTE IN:reads a byte into A Reg(tape
48591 (42954) MOTOR ON: tape - sets bit 3 of $FF21
48604 (42987) MOTOR OFF: tape - clears bit 3 of $FF21
48615 (42876) READ LEADER: motor on & prepares COS to read
48658 (43050) BYTE OUT: writes byte in A Reg to tape
48746 BE6A WRTLDR:turns cassette on and writes a leader
</pre>
THE FOLLOWING ARE DRAGONDOS ROUTINES
<pre>
49166 C00E LENFIL: Report file length
49168 C010 CLOSAL: Close all files
49176 C018 GETFRE: Get free space
49178 C01A DELETE: Delete a file
49180 C01C PROTECT/UNPROTECT a file
49182 C01E RENAME a file
49184 C020 GETDIR: Get directory entry
49406 C0FC WRITE SECTOR: Writes 256 bytes to disk
49412 C104 READ SECTOR: reads 256 bytes from disk
49509 C165 DRIVE INIT: initialises DOS hardware
49513 C169 HARDWARE I/O: low level command to hardware
50108 C3BC FORMAT DISK: in the DEFD drive
53581 D14D GET FREE SPACE: free bytes on current drive
54033 D311 CONVERT SECTOR:converts LSN(Logical sect no)
in Y Reg to Track/Sector
55868 DA3C DIR DSK: directory of disk in DEFD drive to
DEVN
56229 DBA5 BEEP: on entry B Reg should contain number
of beeps
56267 DBCB WAIT TIME:on entry X Reg should contain the
number of milliseconds to wait
56330 DC0A BOOT DSK: boots an OS off disk in DEFD drive
</pre>

== INPUT/OUTPUT ROUTINES ==

<pre>
65280 FF00 Bits 0 to 6 Keyboard row input
Bit 7 joystick comparator input
FF01 PIA
65282 FF02 Bits 0 to 7 keyboard column output
FF03 PIA
FF04 ACIA - D64/Alpha
FF05 ACIA - D64/Alpha
FF06 ACIA - D64/Alpha
FF07 ACIA - D64/Alpha

65312 FF20 Bit 0 - cassette data input
1 - RS232 data output
2/7 - 6 bit D/A(.25 to 4.75 volts out)
65313 FF21 Bit 0 - control of CD
0=FIRQ to CPU disabled, 1=enabled
Bit 1 - RS 232 status input - 0=set flag falling edge CD, 1=rising edge
Bit 2 - normal Data Direction Register addsd - 0=change FF20 to DDR
Bit 3 - Cass Motor control, 0=off, 1=on
4 - always 1
5 - always 1
6 - not used
7 - CD interrupt flag
65314 FF22 Bit 0 - RS 232 data input
1 - single bit cound output
2 - RAM size input
3 - VDG Control Output CSS(color set ct)
4 - VDG Control Output GM0&NOT(INT)/EXT
5 - VDG Cont Output GM1
6 - VDG Cont Output GM2
7 - VDG Cont Output NOT(A)/G
65315 FF23 (Coco) POKE 54 to disable auto exec of cartridge
POKE 55 to enable auto execute of cartridge
Not certain re above for Dragon
Bit 0 - control of cartridge
0=FIRQ to CPU disabled, 1= enabled
Bit 1 - Interrupt input
0=sets flag on falling edge of cartridge
1=sets flag on rising edge of cartridge
Bit 2 - Normally 1, 0=changes FF22 to DDReg
3 - 6 bit sound enable
4 - always 1
5 - always 1
6 - not used
7 - Cartridge Interrupt Flag
65316 FF24 - Dragon Alpha PIA
FF25 - Dragon Alpha PIA
FF26 - Dragon Alpha PIA
FF27 - Dragon Alpha PIA
FF28 - Dragon Alpha 6850 Modem Port

</pre>

== DISK CONTROLLERS ==

<pre>

FF2C - Dragon Alpha FDC
FF2D - Dragon Alpha FDC
FF2E - Dragon Alpha FDC
FF2F - Dragon Alpha FDC

FF40 - Dragon FDC | CoCo FDC | CoCo SDC
FF41 - Dragon FDC | CoCo FDC | CoCo SDC | Becker Port (DriveWire)
FF42 - Dragon FDC | CoCo FDC | CoCo SDC | Becker Port (DriveWire)
FF43 - Dragon FDC | CoCo FDC | CoCo SDC
FF48 - Latch

</pre>

== DIY PROJECTS ==

<pre>
FF50 - DragonMMC
FF54 - DragonMMC
FF56 - Dragon-MSX2+ | DragonMMC
FF57 - Dragon-MSX2+
FF58 - Dragon-MSX2+
FF59 - Dragon-MSX2+
FF5A - Dragon-MSX2+
FF5B - Dragon-MSX2+
FF5C - Dragon-MSX2+
FF5D - Dragon-MSX2+
FF5E - Dragon MSX2+

FF76 - Dragon-MSX2+
FF77 - Dragon-MSX2+
FF78 - Dragon-MSX2+
FF79 - Dragon-MSX2+
FF7A - Dragon-MSX2+ | Orchestra 90
FF7B - Dragon-MSX2+ | Orchestra 90
FF7C - Dragon-MSX2+
FF7D - Dragon-MSX2+
FF7E - Dragon-MSX2+

FF90 - MooH
FF91 - MooH
FFA0 - MooH
FFA1 - MooH
FFA2 - MooH
FFA3 - MooH
FFA4 - MooH
FFA5 - MooH
FFA6 - MooH
FFA7 - MooH
FFA8 - MooH
FFA9 - MooH
FFAA - MooH
FFAB - MooH
FFAC - MooH
FFAD - MooH
FFAE - MooH
FFAF - MooH

65471 FFBF
</pre>

== SAM CONTROL BITS ==
<pre>
65472/7 FFC0/5 VDG Control Registers for 6883 SAM
Contains 3 pairs of addresses (V0-V2), and
poking any value to EVEN addresses sets Bit
Off(0) in VDG circuitry. Poking value to ODD
addresses set Bit ON(1) in 6847 VDG circuit
65472/3 FFC0/1 Control of Bit 0 (V0)
65474/5 FFC2/3 1 (V1)
65476/7 FFC4/5 2 (V2)
65478/91 Page Select Register contains 7 pairs of
FFC6/D3 (F0-F6) control Display Start address (Bin)
Address os upper left most display element=
0000+1/2*OFFSET. Poking any value to even
addresses sets Bit OFF (0) in Page select.
Poking any value to ODD addresses sets Bit
ON(1) in Page Select Circuitry.
Also BASEPAGE is set by converting binary
value of F (Bits F0 to F6) to decimal and
multiplying this decimal number by 512.
65478/9 FFC6/7 Control of Bit 0 (F0)
65480/1 FFC8/9 1 (F1)
65482/3 FFCA/B 2 (F2)
65484/5 FFCC/D 3 (F3)
65486/7 FFCE/F 4 (F4)
65488/9 FFD0/1 5 (F5)
65490/1 FFD2/3 6 (F6)

65492/3 FFD4/5 Page #1 P1 control of Bit 7: (F7) 0=Normal
65494/7 FFD6/9 Clock Speed (R0-R1) Poking any value to even
addresses sets Bit OFF (0). Poking any value
to ODD addresses sets bit ON (1).
65494/5 FFD6/7 Control of Bit R0
65496/7 FFD8/9 Control of Bit R1
R0=0, R1=0 (slow mode defa
</pre>

== MPU VECTORS ==

<pre>
65522/3 FFF2/3 SWI 3 Vector mapped to 49138/9 BFF2/3
65524/5 FFF4/5 SWI 2 vector 49140/1 BFF4/5
65526/7 FFF6/7 FIRQ vector 49142/3 BFF6/7
65528/9 FFF8/9 IRQ vector 49144/5 BFF8/9
65530/1 FFFA/B SWI 1 vector 49146/7 BFFA/B
65532/3 FFFC/D NMI vector 49148/9 BFFC/D
65534/5 FFFE/F RESET vector 49150/1 BFFE/F
</pre>

Dragon 200

2020-05-30T21:22:10Z

Dublevay: /* Dragon 200E */

== Dragon 100 ==

Mentioned several times in Dragon User the Dragon 100 was a Spanish market only machine, probably based on the Dragon 32. Nobody has been able to confirm if these ever existed.

The Dragon 100 is also mentioned in the Dragon 200 Reference Manual ([[Dragón 200 : Manual de referencia]]), on page 13. It says that the Dragon 200 memory map 0 configuration is identical to that of the Dragon 100.

== Dragon 200 ==

The Dragon 200 is functionally and technically the same as a [[Dragon 64]]. The differences between the two are purely cosmetic with the new owners ([[Eurohard SA]]) changing the branding and look of the Dragon. The Dragon 200 was very successful in Spain and was introduced to many educational channels.

<gallery name="Dragon 200">
Image:Dragon200.jpg|Dragon 200
Image:Dragon200Box.jpg|Dragon 200 Box
Image:Dragon200ad.jpg|Dragon 200 Advertisement
Image:Dragon200_SoftwarePack.jpg|Dragon 200 Software Pack
</gallery>

The Software Pack that came with the computer contained the following titles:
* [[A Contar]]
* [[Dragon Selection 1]]
* [[Dragon Selection 2]]
* [[Flag]]
* [[Synther 7]]
* [[Viking]]

== Dragon 200E ==

This machine was a version of the Dragon 200 (thus, of the Dragon 64) for the spanish market.

The popular belief was that it had an 80-column display card and may have been similar in specification to the Compusense [[Dragon Plus]] add-on, but it has a piggyback board that sits on the 6847 VDG socket and contains said VDG and a new character rom. Scans of the boards are available [http://archive.worldofdragon.org/index.php?title=Motherboard_Pictures#Dragon_200E here].

The character rom changes the inverse video characters for lowercase, spanish characters such as ñ, ü and ç, and other symbols and accents.

The piggyback board also has a jumper to allow the character set to be seen in standard or inverse video.

A reproduction version of this board has been created by [https://www.dragonplus-electronics.co.uk/?product_cat=hardware DragonPlus Electronics].

<gallery name="Dragon 200E">
Image:Dragon200E_TopAngled.jpg
Image:Dragon200E_Top.jpg
Image:Dragon200E_TopOpen.jpg
Image:Dragon200E_Bottom.jpg
Image:Dragon200E_Back.jpg
Image:Dragon200E_Right.jpg
Image:Dragon200E_Left.jpg
Image:Dragon200E_Keyboard.jpg
Image:Dragon200E_Font.jpg
Image:Dragon200E_Font_InverseVideo.jpg
</gallery>

== Dragon 300 ==

Several mentions in Dragon User but no evidence that it even got to prototype stage - This was supposed to be something similar to the Dragon Alpha/Professional which Eurohard had decided not to continue with and instead concentrated on a Dragon MSX machine.

[[Category:Documentation]] [[Category:Hardware]]

Oojamaflip by DragonPlus Electronics

2020-05-30T21:18:13Z

Dublevay: Add Oojamaflip 2020 with description and link to sale site

The Oojamaflip is a remake of a device manufactured in the late 1980s for the Dragon computer by Richard Sutcliffe of Sutcliffe Electronics. His original boards were very ingenious and well made devices which have stood the test of time.

The Oojamaflip permits the connection of some of the newer peripherals alongside one of the virtual disk solutions, like DragonMMC, DragonDrive or CocoSDC. My main use so far has been for connecting the V9958 Wordpak 2+ board to a Dragon 64 at the same time as the DragonMMC or CocoSDC.

It won’t work for everything – but it does certainly allow more flexibility on the cartridge port.

The Oojamaflip is available from [https://www.dragonplus-electronics.co.uk/?product_cat=hardware DragonPlus Electronics].

DIY Projects

2020-05-30T21:16:12Z

Dublevay: /* Cartridges & Expansions */

The Dragon series of computers offers programming models and a cartridge expansion connector that are ideally suited to hardware hackers and hobbyist experimenters. Below, you can find a selection of projects that have been created by members of the Dragon community.

Click the item to learn more about it, buy one or download schematics and associated software (where applicable).

== Adapters & Cables ==
* [[Replacement power supply unit]]
* [[Dragon32/iPhone Bi-Directional Data Cable (Rink)]]
* [[Dragon 32/64 Drivewire Adapter]]
* [[Floppy Cable]]

== Cartridges & Expansions ==
* [[Multicart by Prime (Phill Harvey-Smith)]]
* [[DragonMMC SDCard Interface by Prime (Phill Harvey-Smith)]]
* [[Oojamaflip by DragonPlus Electronics]]
* [[Dragon ROM/RAM Cartridge (Rink)]]
* [[Dragon I/O Cartridge (Rink)]]
* [[Dragon Multi Cartridge version 1.0 (Rolo)]]
* [[Dragon Multi Cartridge version 1.5 (Rolo)]]
* [[80 Column WordPak]] (CoCoDemus)
* [[Dragon Lab-Cartridge version 1.0 (Rolo)]]
* [[uDW SD-card DriveWire microserver]] (Tormod)
* [[Dragon Multi Cartridge version 1.6 (Rolo)]]

== 6809 DIY construction kits ==
Here a list of external DIY instructions to build a own 6809 based computer:

* [http://searle.hostei.com/grant/Multicomp/ Grant's Low-cost FPGA project "MULTICOMP"]
* [http://searle.hostei.com/grant/6809/Simple6809.html Grant's 6-chip 6809 computer]
* [http://www.msarnoff.org/projects/6809/ Ultim809: Homebrew 8-Bit Computer]
* [http://www.8bitforce.com/simon6809/ Simon 6809]
* [http://laurent68k.free.fr/Site/RedBoard6809.html HOMEBREW Computer 6809: RedBoard]

See also forums thread related to this list: http://archive.worldofdragon.org/phpBB3/viewtopic.php?f=8&t=4338

[[Category:Documentation]] [[Category:Hardware]] [[Category:DIY_Projects]]

Dragon Plus

2020-05-30T21:14:16Z

Dublevay: Add mention and link to reproduction DragonPlus boards

The Dragon Plus was an add-inboard for the Dragon 32 or 64. It provided an additional 64KB of RAM and an 80 column text mode driven by an MC6845 with its own 2KB buffer. The board plugged into the SAM socket on the motherboard, with the SAM being placed on the Dragon Plus board and also required one of the BASIC roms to be moved to the Dragon Plus board with a ribbon cable plugging into the vacated socket. The 80 column display required an additional monitor socket to be provided on the Dragon case as this used its own composite video output circuit.

There was also an IDE interface planned to allow connection of a hard disk drive - the 40-pin header for the IDE interface can be seen on the Dragon Plus circuit board, along with what appears to be space for a missing IC.

A special version of Edit+ was available, along with drvers for OS-9 Level 1 and a special version of Flex. Both the OS-9 and Flex implementations used the additional 64KB as a RAM disk so the main OS ran completely from RAM, thus speeding up operating and allowing disk 0 to be changed. Both OS-9 and Flex also supported the use of the 80 column display.

== PCB Pictures ==
[[File:DragonPlus_PCB_Top_Empty.jpg|300px]][[File:DragonPlus_PCB_Bottom_Empty.jpg|300px]][[File:DragonPlus_PCB_Top_Empty_Annotated.jpg|300px]][[File:DragonPlus_PCB_Empty.jpg|300px]][[File:DragonPlus_Clone_Mask_Bottom.jpg|300px]][[File:DragonPlus_Clone_Mask_Top.jpg|300px]][[File:DragonPlus_Clone_Mask_Composite.jpg|300px]]

== Other Pictures ==
<gallery>
Image:DragonPlus_Mounted.jpg|Mounted board
Image:DragonPlus Clone PCB Top Perspective.jpg|Clonic board
Image:DragonPlus_PCB_Top_Perspective02.jpg
Image:DragonPlus_Components.jpg
Image:DragonPlus_Components02.jpg
Image:DragonPlus_Diagrams01.jpg
Image:DragonPlus_Diagrams02.jpg
Image:DragonPlus_OS9Drivers.jpg
Image:DragonPlus_TechnicalInfo01.jpg
Image:DragonPlus_TechnicalInfo02.jpg
Image:DragonPlus_TechnicalInfo03.jpg
Image:DragonPlus_TechnicalInfo04.jpg
Image:DragonPlus_Charset.png|Character set
</gallery>

== Advertisement ==
<gallery>
Image:Dragonplus.jpg
</gallery>

== Downloads ==
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Compusense%20-%20Dragon%20Plus%20-%20Chargen.zip Dragon Plus Character ROM] (zipped ROM file)
* [http://archive.worldofdragon.org/archive/index.php?dir=Roms/Dragon/&file=Compusense%20-%20Dragon%20Plus%20-%20PROM.zip Dragon Plus PROM] (zipped binary file)

== Reproduction Boards ==
A near replica of these boards was launched in early 2019 by John Whitworth, with the approval of Ted Opyrchal, ex-MD of Compusense. The boards are functionally identical though they do not have the empty expansion pinout at the bottom, which was never utilised anyway. The boards can be purchased, in kit form, [https://www.dragonplus-electronics.co.uk/?product_cat=hardware here].

[[Category:Hardware]]