Makin 2.35 ROM for the A570

[HomeLate]

To make sure your A570 works, did it boot with rom 2.30 and the original 68k in the A500?

I had similar behavior with my old A590 (bought another one here on Amibay). The A500 would boot and the 2Mb memory of the A590 was detected, but the hard drive was never found because it couldn't find scsc.device.

 

[Xanxi]

I came home early before children today and couldn't help trying it again.

So, the A570 does work with rom 2.35 and a 68000.
Back with the Spitfire, it boots to the WB with the A570 shut off with the knob, but still black screen with the device on.
Except if i jumper the Spitfire to 7 MHz, then it works, boots to CDTV screen, escapes to the Workbench, reads an audio CD (apparently because i have no speakers at hand).
Again at 14 MHz black screen.

It doesn't like 14 MHz, or maybe the 68010 i have fitted on this one which works perfect without the CD drive.

I need to further test everything but that's a big progress and proves the A570 to be working.
About the 14 MHz problem, i don't know if that should be investigated in the ROM or in the Spitfire's firmware, but i am already in contact with both authors.
@levo-ace , could you tell if you are running 7 or 14 MHz, 68000 or 68010?

 

[levo-ace]

Updated rom .

By the way , I had to change the stock 68k for a 16mhz version .

 

[Xanxi]

Yes i have 2.35 too now.
You have a 16 MHz capable 68000 so i take it you are running 14 MHz?
I have a 68010 rated for 12 MHz, 14 MHz is a small overclock and it has been fine so far.
I have been in touch with jbilander who thinks there could be the need of a firmware ajustement of the DMA arbitration. I need to try to switch from 7 to 14 MHz while running but i don't have a switch for now, only the jumper. Will try it soon.

 

[Lamaman1971]

Ive recently had some fun with an A570. The upgrade ROM was a bit of challenge for me too - I got there in the end. In actuality, two other things caught me out a bit - first I had a couple of blown through hole caps on the CD ROM drive rear pcb. That got it working. However, I quickly realized that if I wanted to use the CDTV end of things to play around with those old CD's it didnt really matter which clever ROM I had in there, some titles simpley didnt work without using the A500 as stock and period correct as possible.

 

[Xanxi]

Hello.
Still working on this problem, as the request of jbilander, i have made myself a switch to change from 7 MHz to 14 MHz and back during operations.
The A570 boots to CDTV screen at 7 MHz, doesn't crash when switching live to 14 MHz, then i can escape and load the WB from the harddrive. From there at 14 MHz, calling CDPlay (A570 WB utility) at 14 MHz makes it crash. At 7 MHz it works.

This is now an ultra niche problem to solve, out of 20000 A570 made by Commodore, how many are still working and used? And amongst those, how many are using the Spitfire.
I feel like the problem is with accelerator still running on the mobo clock, as it seems 68030 accelerators with their own clock like TF536 work with latest ROMs.
I hope a solution can be found because i prefer that computer, my original one from 1991, to still feel like the 90's, it already have other vastly accelereted Amiga computers.