Imagedisk and the PCJR

[VERAULT]

So I am trying to run Image Disk 1.18 on my PC-JR and I keep getting "No interrupt from FDC"

I take it the obvious must be true; IMAGE DISK does not support the PCJR? Has anyone patched a version that does work, because pulling out my 5160 just to use image disk is going to be a pain.

 

[Chuck(G)]

Here's the reason:

The floppy controller on the PCjr also had its I/O registers mapped into different ports than on the PC, and since the PCjr did not have DMA, the BIOS routines for handling floppy access were different and more complex than those on the PC. Software that tried to perform direct, low-level disk access (mainly utilities, but also the occasional game such as Dunzhin: Warrior of Ras) would not work unless it was rewritten for the PCjr.

 

[VERAULT]

Thanks Chuck, I figured something along those lines. Just wanted to be sure.