MC6845 - Revision history

Alastair: Typo correction.

2014-08-05T23:28:08Z

Typo correction.

Jedie at 14:41, 5 August 2014

2014-08-05T14:41:24Z

Jedie at 14:39, 5 August 2014

2014-08-05T14:39:52Z

Admin at 17:29, 10 February 2010

2010-02-10T17:29:28Z

Admin at 17:29, 10 February 2010

2010-02-10T17:29:13Z

Admin: Created page with 'The MC6845 CRT Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluste...'

2010-02-10T17:28:35Z

Created page with 'The MC6845 CRT Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluste...'

New page

The [[MC6845 CRT]] Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluster configurations. The CRTC is optimized for hardware/software balance in order to achieve integration of all key functions and maintain flexibility. Forinstance, all keyboard functions, R/W, cursor movements, and editingare under processor control; whereas the CRTC provides video timing and Refresh Memory Addressing.

• Applications include "glass-teletype," smart, programmable, intel-ligent CRT terminals; video games; information display.
• Alphanumeric, semi-graphic, and full graphic capability.
• Fully programmable via processor data bus. Can generate timing for almost any alphanumeric screen density, e.g. 80 x 24, 72 x 64,132 x 20, etc.
• Single +5 volt supply. TTL/6800 compatible I/O.
• Hardware scroll (paging or by line or by character)
• Compatible with CPU's and MPU's which provide a means forsynchronizing external devices.
• Cursor register and compare circuitry.
• Cursor format and blink are programmable.
• Light pen register.
• Line buffer-less operation. No external DMA required. RefreshMemory is multiplexed between CRTC and MPU.
• Programmable Interlace or non-interlace scan.
• 14-bit wide refresh address

@@ Line 1: / Line 1: @@
-The [[MC6845]] CRT Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluster configurations. The CRTC is optimized for hardware/software balance in order to achieve integration of all key functions and maintain flexibility. Forinstance, all keyboard functions, R/W, cursor movements, and editingare under processor control; whereas the CRTC provides video timing and Refresh Memory Addressing.
+The [[MC6845]] CRT Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in standalone or cluster configurations. The CRTC is optimized for hardware/software balance in order to achieve integration of all key functions and maintain flexibility. For instance, all keyboard functions, R/W, cursor movements, and editing are under processor control; whereas the CRTC provides video timing and Refresh Memory Addressing.
-• Applications include "glass-teletype," smart, programmable, intel-ligent CRT terminals; video games; information display.
+• Applications include "glass-teletype," smart, programmable, intelligent CRT terminals; video games; information display.
 • Alphanumeric, semi-graphic, and full graphic capability.
@@ Line 11: / Line 11: @@
 • Hardware scroll (paging or by line or by character).
-• Compatible with CPU's and MPU's which provide a means forsynchronizing external devices.
+• Compatible with CPU's and MPU's which provide a means for synchronizing external devices.
 • Cursor register and compare circuitry.
@@ Line 19: / Line 19: @@
 • Light pen register.
-• Line buffer-less operation. No external DMA required. RefreshMemory is multiplexed between CRTC and MPU.
+• Line buffer-less operation. No external DMA required. Refresh Memory is multiplexed between CRTC and MPU.
 • Programmable Interlace or non-interlace scan.

← Older revision		Revision as of 14:41, 5 August 2014
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	* https://en.wikipedia.org/wiki/Motorola_6845		* https://en.wikipedia.org/wiki/Motorola_6845
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		+	[[Category:Documentation]] [[Category:Hardware]]

← Older revision		Revision as of 14:39, 5 August 2014
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	• 14-bit wide refresh address		• 14-bit wide refresh address
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		+
		+	Links:
		+
		+	* https://en.wikipedia.org/wiki/Motorola_6845

← Older revision		Revision as of 17:29, 10 February 2010
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−	The [[MC6845 ~~CRT~~]] Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluster configurations. The CRTC is optimized for hardware/software balance in order to achieve integration of all key functions and maintain flexibility. Forinstance, all keyboard functions, R/W, cursor movements, and editingare under processor control; whereas the CRTC provides video timing and Refresh Memory Addressing.	+	The [[MC6845]] CRT Controller performs the interface to raster scan CRT displays. It is intended for use in processor-based controllers for CRT terminals in stand-alone or cluster configurations. The CRTC is optimized for hardware/software balance in order to achieve integration of all key functions and maintain flexibility. Forinstance, all keyboard functions, R/W, cursor movements, and editingare under processor control; whereas the CRTC provides video timing and Refresh Memory Addressing.

	• Applications include "glass-teletype," smart, programmable, intel-ligent CRT terminals; video games; information display.		• Applications include "glass-teletype," smart, programmable, intel-ligent CRT terminals; video games; information display.