So you've tried with Full operating mode disabled and enabled?
Have you tried different boot loader types (to disable boot menu)? If not, try other boot loaders with Full Operating mode enabled and be sure to use AT build.
Yes, I had tried many possible combinations, including those elements.
I have just now retried various combinations and seen the same result.
I list those combinations below.
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The XTIDE card has the AT version of 1.1.5 loaded.
Minimum hardware configuration: motherboard / CGA card / floppy controller / XTIDE card / PSU / keyboard / battery
With the AMI BIOS in place, the XTIDE card works as expected.
That verifies that I haven't introduced a second problem (e.g. bad cable).
When I then swap the AMI BIOS for the first revision IBM one - problem appears as expected.
I then experiment with the XTIDE BIOS configuration as follows:
* Full=yes - Menu - interrupts off - block transfers on
* Full=yes - Menu - interrupts off - block transfers off
* Full=yes - Menu - interrupt=3 - block transfers on (for this test, jumper on XTIDE card added for IRQ3)
* Full=yes - Menu - interrupt=3 - block transfers off (for this test, jumper on XTIDE card added for IRQ3)
* Full=yes - 'A then C' - interrupts off - block transfers on
* Full=yes - System - interrupts off - block transfers on (if no boot floppy present, this boots to BASIC)
* Full=no - Menu - interrupts off - block transfers on
None of the combinations work.
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SOMETHING POSSIBLY RELEVANT
I'd noticed this before, and have just verified it.
Whenever the EEPROM is flashed, the message "EEPROM was written successfully. Press any key to reboot." appears.
With the first revision IBM BIOS on the motherboard, pressing any key results in the screen going blank, but nothing more - no restart.
With the first revision IBM BIOS on the motherboard, GSETUP can successfully restart the 5170.
If I then upgrade the motherboard BIOS to the second revision one, XTIDECFG can then restart the 5170.
A bug in the first revision IBM BIOS for the 5170 ?