Apple-1-HW
/
RC6502-Apple-1-Replica
mirror of https://github.com/tebl/RC6502-Apple-1-Replica.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

FIXUP SBC/README: Correct RAM/ROM enable descriptions.

This commit is contained in:
Curt J. Sampson 2020-05-20 10:03:13 +09:00
parent a51092e409
commit a983746b85
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
RC6502 Apple 1 SBC/README.md
View File

@ -95,11 +95,13 @@ box around the pins that enable.
- Bottom pair shorted: Disable PIA. Connects `CS1` to ground.
- `RAM_EN`
- Left pair shorted: Enable RAM. Connects RAM `C̅S̅`/`O̅E̅` to ground.
- Left pair shorted: Enable RAM. Connects RAM `C̅S̅`/`O̅E̅` to address
decoding logic (`CS_RAM`).
- Right pair shorted: Disable RAM. Connects RAM `C̅S̅`/`O̅E̅` to Vcc.
- `ROM_EN`
- Top pair shorted: Enable ROM. Connects ROM `C̅E̅`/`O̅E̅` to ground.
- Top pair shorted: Enable ROM. Connects ROM `C̅E̅`/`O̅E̅` to address
decoding logic (`CS_ROM`).
- Bottom pair shorted: Enable ROM. Connects ROM `C̅E̅`/`O̅E̅` to Vcc.
- `A14_W`, `A13_W`