I too am working on getting an 1110HD working. So far no luck.
The pic above confirms what I've found by probing the CP2024 drive. The DMA pins are oddball from IDE.
On starting the computer, the LED on the Pico flickers showing it's seeing activity.
This goes on for a few minutes and then the computer prints:
hard disk initialization failure has been noted...
Strike the F1 key to continue
It appears the Tandy BIOS is not getting the proper response and after some number of retries errors out.
The CP2024 uses the Cirrus CL-SH260 controller IC. Perhaps it's not register compatible with other XTA drives? I have the datasheet.
I've tried disconnecting the even numbered data and signal pins just in case. No luck there either.
Is there a way to have the XTA2SD log activity? It might help figure this out.
The pic above confirms what I've found by probing the CP2024 drive. The DMA pins are oddball from IDE.
On starting the computer, the LED on the Pico flickers showing it's seeing activity.
This goes on for a few minutes and then the computer prints:
hard disk initialization failure has been noted...
Strike the F1 key to continue
It appears the Tandy BIOS is not getting the proper response and after some number of retries errors out.
The CP2024 uses the Cirrus CL-SH260 controller IC. Perhaps it's not register compatible with other XTA drives? I have the datasheet.
I've tried disconnecting the even numbered data and signal pins just in case. No luck there either.
Is there a way to have the XTA2SD log activity? It might help figure this out.