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SBC/README: Fix backwards description of the VP GND jumper 

Issue #29 from ea4eoz noted that this is backwards for the revision H
board. It's clearly must be backwards for _every_ revision, since
closing a jumper, rather than opening it, is the way to connect the
other side of the jumper to ground.

(This error was inserted by me when I originally wrote this section
of the documentation.)
This commit is contained in:
Curt J. Sampson 2021-12-07 18:14:08 +09:00
parent e395f2787f
commit 69f95e462e
1 changed files with 3 additions and 5 deletions
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8
RC6502 Apple 1 SBC/README.md
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@ -88,11 +88,9 @@ box around the pins that enable.
the expansion bus connector.
- `VP GND`
- Shorted: WD65C02 CPU. Leaves pin 1 of the CPU (`V̅P̅` on the
WD65C02) floating.
- Open: Original MOS 6502, UM6502, SY6502, R65C02. Connects pin 1 of
the CPU to ground, providing an additional ground connection for
the CPU.
- Shorted: Original MOS 6502, UM6502, SY6502, R65C02. Connects pin 1 of the
CPU to ground, providing an additional ground connection for the CPU.
- Open: WD65C02 CPU. Leaves pin 1 of the CPU (`V̅P̅` on the WD65C02) floating.
- `PIA_EN`
- Top pair shorted: Enable PIA. Connects `CS1` to Vcc.