DDI-1DR Disk Controller

From The Dragon Archive


A DragonDOS compatible disk controller by P.N.P. Communications.

DDI-1DR Interface Pictures

IC Parts Lists

DDI-1DR Board IC list (with Datasheets)

Part Number Description Datasheet
2764 8Kb EPROM (pdf)
7407 Hex Buffers with High Voltage Open-Collector Outputs (pdf)
SN74LS00N Quad 2-input positive-NAND gates (pdf)
SN74LS04N Hex inverters (pdf)
SN74LS73N Dual JK negative edge-triggered flip-flop (pdf)
SN74LS139AN Dual 2-line to 4-line decoders / demultiplexers (pdf)
SN74LS273N Octal D Flip-Flop with clear (pdf)
TMS2797NL Floppy Disk Formatter/Controller (pdf)
ULN2003AN High-voltage High current Darlington transistor array (pdf)