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The four signal and power lines can be seen connecting the card to the breadboard.
Plan view showing all the connections.
Oscilloscope Readings
This produced the signals required.
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The latest software was tried again in a standard 512K/512K Flash/RAM Card and I Vic could not make the games software go wrong.
There is no point testing the fast decode circuit unless it improves the situation. There was only one other test I could think of trying and that was to use an older copy of OZ 4.7 to see if that still fails.
| OZ 4.7 | Version | Date | |
|---|---|---|---|
| 0F2E5776 | 07/04/2016 | ||
| 01F0E215 | 31/08/2016 | PASS |
The older version is all right as well.
I DO NOT UNDERSTAND THIS
Why doesn't it fail any more?prototype board was packed and sent to Mr T who had a failing Z88 and 512K/512K Flash/RAM Card.