Another of the simple boards, the 8K ROM board is little more than a breakout board for a 27C64 EPROM and little bit of decoding for the enable line
Data lines D0 – D7 and address lines A0 – A12 connect directly to the EPROM for 8K of addressable memory. Address lines A13, A14 & A15 need to all be low for the Chip Enable to be triggered, which places it in the ox000 – 0x1FFF address space. The RD and MREQ need to be low to trigger the Output Enable
Click the image below for schematics in PDF format
Bill of Materials
- PCB
- 34 pin R/A header
- 28 pin wide DIL socket
- 14 pin narrow DIL socket
- 27C64 EPROM
- 74ls32
