Last Updated: November 09, 2005 09:48:34 PM
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REV. A of the card the 6845 card. The top RCA connector is for composite video, the 9 pin connector provide video, horizontal drive, vertical drive for an Electrohome monitor. This card replaces System-4 video card. This card is based on a design that appeared in BYTE Magazine May 1979.
Description
Issues/todo log
| Date | Description | Status | |
| Remove Divide 6 or 7 dot clock jumper | |||
| Add lower case character set | |||
| Remove divide by character clock 7490 and jumpers | |||
| Fix schematic 74163 and remove jumpers | |||
| Add DB9 pin connector to PCB | |||
| A11 Pin 21 of EPROM should be tied low not high | Fixed via double socket | Rev. A | |
Schematics, board layout, and operational description
| Revision | Production Date | Schematic | Layout | Operational Description | Font EPROM |
| A | Feb. 15/2005 | v6845-a.sch | v6845-a.brd | TBD | |
| B | In development *untested* | v6845-b.sch | v6845-b.brd |
TBD |