The Sinclair QL Forum

ones' complement wrote: Thu Jun 06, 2024 9:53 pm If only ROMOEH had been like ZX ROMCS and could be usurped. Need to remove internal ROMs to put 64K on ROM port.

Oh, I guess I misunderstood and thought the internal ROM could stay put and would be bypassed...then it's not as useful.

ones' complement wrote: Thu Jun 06, 2024 10:46 pmI suppose it's not impossible to do a mod to that effect now but I guess QIMSI has bagged that pin now

But could be more usefully reemployed so even QIMSI could provide host QL OS ?

(I would think ROMOEH mod would be no more messy than beeper mod. ZX style via 680 ohm?).

I now have an internal 68K/OS ROM board, with my 16KB Utility ROM, installed in my spare QL (many thanks Chr$!)

This frees up the expansion port so I can try and get a floppy drive working (unlikely but worth a try)

t0nyt wrote: Mon Jun 17, 2024 2:07 pm I now have an internal 68K/OS ROM board, with my 16KB Utility ROM, installed in my spare QL (many thanks Chr$!)

This frees up the expansion port so I can try and get a floppy drive working (unlikely but worth a try)

The more I look at the disk.driver file the more I think it was actually written for a hard drive (e.g. dkinit routine), though with glaring errors like Do instead of D0 I doubt the file ever worked (maybe someones attempt at a driver rather than something that was on the original Assembler MD. If anyone else has access to another original Assembler MD for 68K/OS it would interesting to find out if it's on there too)

It's such a shame there isn't more information available for 68K/OS

Maybe the next approach would be to try and disassemble the OS itself, but that sounds a nightmare

Just for the fun of it, it's not much use as you can't access 68K/OS MDV's, but this is 68K/OS running on MIST

Just use the QL.rbf MIST Core, but replace the QL.rom with the one in the attached zip

t0nyt wrote: Sun Nov 24, 2024 3:09 pm Just use the QL.rbf MIST Core, but replace the QL.rom with the one in the attached zip


ql.rom.zip

Were you ever able to get the disk driver loaded and working? I'm assuming that driver would have to be understood in order to get it to work with Q-emuLator.

bwinkel67 wrote: Thu Dec 26, 2024 12:26 am

t0nyt wrote: Sun Nov 24, 2024 3:09 pm Just use the QL.rbf MIST Core, but replace the QL.rom with the one in the attached zip


ql.rom.zip

Were you ever able to get the disk driver loaded and working? I'm assuming that driver would have to be understood in order to get it to work with Q-emuLator.

Sadly not so far. There are references in the small amount of code to things that don’t exist. And a couple of spelling mistakes, don’t think the file was part of the original distribution

The 68k/os card also has no pass-thru so I don’t think they ever really planned for floppy, unless they hoped someone else would make a floppy controller with pass-thru (I’ve not come across one so far) to plug it into

To use with a floppy controller in the QL it means replacing the ROMS internally and to be honest I’ve got fed up swapping (& occasionally breaking) ROM boards

Until I can find a ROM swapper I can’t see me doing any more with 68K/OS on real hardware (the ROMs won’t work side loaded in a SGC)

t0nyt wrote: Thu Dec 26, 2024 9:03 am Until I can find a ROM swapper I can’t see me doing any more with 68K/OS on real hardware (the ROMs won’t work side loaded in a SGC)

I don't have a QIMSI but does that have the ability to load and hot-swap ROMs?

If we ever get an emulator to support those ROMs so they can emulate file I/O, that would make things easier.

I’ve not tried the ROMS on QIMSI gold as it can’t access MDVs and I don’t believe it could access a floppy controller either

I need to get a good signal read of the ASM cart using a PC to help progress things on the emulator front, but life’s been getting in the way. Will give it another go in the next couple of weeks though.