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Brain-Board-II
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Update README.md

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Alex Kwiecinski 2023-10-31 16:52:18 -04:00 committed by GitHub
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@ -18,23 +18,33 @@ Lastly, it is imperative to use a 27C512 or SST 27SF512 with this design in plac
Normal operation is the same if you follow the quick start guide from the original Brain Board manual. bb-v5_1.pdf is provided in this repository, but for convenience, these are the 2 most common settings.
# SETTING 1: QUICK START - Use ApplesoftInteger.BIN or QuickStart.BIN
# SETTING 1: QUICK START
**Use ApplesoftInteger.BIN or QuickStart.BIN**
DIPS:
1,3,5,8: ON
4,6,7 OFF
When using ApplesoftInteger.BIN:
**When using ApplesoftInteger.BIN:**
DIP2 doesn't matter if you use the ApplesoftInteger.bin ROM, since the wozaniam pack is in the same relative location in both banks that this DIP controls.
In this mode, the back toggle will switch between normal system ROM, and the Wozaniam (apple 1 emulation) mode.
If you don't need Applesoft on the ROM card (i.e. you have a IIe with good ROMS on the motherboard), you can use the QuickStart.ROM. See more on Rom Layout below.
When using QuickStart.BIN
**When using QuickStart.BIN:**
DIP2 changes the visible low bank to the brain board between integer BASIC and Wozaniam / Apple 1 mode.
In this mode, the back toggle will switch between normal system ROM, and the Wozaniam (apple 1 emulation) mode OR Integer BASIC, depending on the position of DIP 2. This makes the card a handy Integer BASIC ROM card with an optional Apple 1 mode.
# SETTING 2: APPLESOFT / INTEGER BASIC - Use ApplesoftInteger.BIN only
# SETTING 2: APPLESOFT / INTEGER BASIC
**Use ApplesoftInteger.BIN only**
1,4,5,7 ON
@ -44,7 +54,9 @@ In this mode, the back toggle will switch between normal system ROM, and the Woz
When dips are set this way, the system ROMS are entirely on the Brain Board (this is done by inverting switches 3/4 from the previous settings). This means that you should be able to run an Apple II logic board with no onboard ROMs.
In this mode, the back toggle will still enable Wozaniam (Apple 1 mode) when up, but when flipped down, it will boot either Applesoft or Integer BASIC from the Brainboard's ROM depending on the position of DIP2. DIP2 was unused in the original Brainboard design/documentation. SETTING 1 is most compatible with other expansion cards and accessories, since it uses the system rom when the main switch is disabled. The second config makes the brain board more versatile by accessing the other slots of the ROM, but it may cause conflict with some expansion cards.
In this mode, the back toggle will still enable Wozaniam (Apple 1 mode) when up, but when flipped down, it will boot either Applesoft or Integer BASIC from the Brainboard's ROM depending on the position of DIP2. DIP2 was unused in the original Brainboard design/documentation.
SETTING 1 is most compatible with other expansion cards and accessories, since it uses the system rom when the main switch is disabled. The second config makes the brain board more versatile by accessing the other slots of the ROM, but it may cause conflict with some expansion cards.
# ROM Layout