LIV2/GottaGoFastRAM2000
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Add memory layout to aid troubleshooting

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Matt Harlum 2022-05-25 13:18:11 +00:00
parent 4fb2d0c7f3
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README.md
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@ -71,4 +71,17 @@ For best results the boards should be manufactured with the "Gold Fingers" optio
On Kick 1.3-3.1 the system will not alert you to this happening and will continue to boot (this is used to do the autosizing) but newer versions "helpfully" tell you about this condition.
If using one of these newer kickstart versions with a Bridgeboard I'd recommend flashing the [6MB Firmware](https://github.com/LIV2/GottaGoFastRAM2000/raw/master/Binary/gottagofast2000-6MB.jed)
Another option would be to write the firmware to offer multiple 2MB blocks until it is shut up which unfortunately doesn't work, because Kickstart 1.3-3.1 will throw a yellow screen if the last board in the chain was shut up, and newer versions will throw the gray screen telling us the board has been shut-up.
* **Problem**: With the board installed I get a red screen saying that this board is defective
**Solution**: This usually means that one of the RAM chips are faulty or there could be bad soldering.
Remove all other Zorro cards, boot up [ATK](https://github.com/keirf/amiga-stuff/releases) or Diagrom and do a manual memory test with the individual ranges listed in the memory map below.
Consult the memory map below to figure out which RAM chip is being reported faulty.
If the same bits are reported as faulty across multiple of the address ranges check for bad soldering around the RAM chips and the buffers at U3&U4.
### Memory Map
|Address range|Chip|
|-------------|----|
|200000-3FFFFF|U6|
|400000-5FFFFF|U7|
|600000-7FFFFF|U8|
|800000-9FFFFF|U9|