From 6b8fa61b8ccb6b62510619545873ddf4cdb81276 Mon Sep 17 00:00:00 2001 From: "Curt J. Sampson" Date: Tue, 7 Dec 2021 18:18:46 +0900 Subject: [PATCH] SBC/README: RAM_EN jumper is vertical on newer versions of the board Issue #29 from ea4eoz noted this, and I've confirmed myself that the latest revision as of this commit (e395f27) has moved the jumper to a vertical orientation with the lowest pin connected to Vcc. --- RC6502 Apple 1 SBC/README.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/RC6502 Apple 1 SBC/README.md b/RC6502 Apple 1 SBC/README.md index 7a50ced..2b3396f 100644 --- a/RC6502 Apple 1 SBC/README.md +++ b/RC6502 Apple 1 SBC/README.md @@ -97,9 +97,9 @@ 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 address + - Left or upper 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. + - Right or lower pair shorted: Disable RAM. Connects RAM `C̅S̅`/`O̅E̅` to Vcc. - `ROM_EN` - Top pair shorted: Enable ROM. Connects ROM `C̅E̅`/`O̅E̅` to address