exxos's Atari, Amiga & retro forum

PhilC wrote: 27 May 2019 12:19

Cyprian wrote: 27 May 2019 12:05 maybe we can buy the ST for TerribleFire, and he could improve the FPGA code?

He does already have one, hes just likes all and has lots of projects and not enough time.

I'm sure if more interest is paid my us Atari guys that TF will spend a little more time developing for it too.

I want to help TF bring a 030 to the ST, we talked about this much already previously in PM, but of course both of us simply do not have enough time to do it at the moment.

IIRC One of the issues with the current TF design is it does not have all the address bus rooted to the PLD to allow TOS to boot up on the TF card.. So right there we already need a redesign of the TF card.. again IIRC, the PLD used on TF's boards hasn't enough IO to do that.. But we may need some other routing with signals with the bus grant stuff etc as Amiga doesn't use those CPU features..

exxos wrote: 27 May 2019 13:07IIRC One of the issues with the current TF design is it does not have all the address bus rooted to the PLD to allow TOS to boot up on the TF card.. So right there we already need a redesign of the TF card.. again IIRC, the PLD used on TF's boards hasn't enough IO to do that.. But we may need some other routing with signals with the bus grant stuff etc as Amiga doesn't use those CPU features..

What address range is addressable by TF534?
I guess TF should see Amiga's Kickstart ROM, which according to https://www.amigacoding.com/index.php/Amiga_memory_map is located between:
F80000-FBFFFF - first 256kb
FC0000-FFFFFF - second 256kb

It would be possible to relocate TOS and EmuTOS to one of that address range

and finally, from performance point of view, would be good to copy TOS/EmuTOS to FC ram.

Cyprian wrote: 27 May 2019 14:01 What address range is addressable by TF534?
I guess TF should see Amiga's Kickstart ROM, which according to https://www.amigacoding.com/index.php/Amiga_memory_map is located between:
F80000-FBFFFF - first 256kb
FC0000-FFFFFF - second 256kb

It would be possible to relocate TOS and EmuTOS to one of that address range

I don't know much about the TF projects, it was some months ago when we was discussing it.. But we need to decode lower address lines to decode the start address which I think was the sticking point. I think A1-A5 wasn't on the TF board.. but again, this was months ago so don't remember much about it now.

The last Tf534 has all the address pins. As does the 536. No spare decode pins on the 536.

The 536 should be ST friendly with the clock switching stuff. How you’d use 64mb of ram on an ST is another question.

terriblefire wrote: 27 May 2019 14:55The 536 should be ST friendly with the clock switching stuff. How you’d use 64mb of ram on an ST is another question.

sounds really cool

New Board TF536

Cool, will have to get me one of those to play around with then :)

exxos wrote: 27 May 2019 15:22 Cool, will have to get me one of those to play around with then :)

I can send you a 534 if you like? You'll just need to fit an 030 to it. (Once I've got it booting that is)

PhilC wrote: 27 May 2019 16:14 I can send you a 534 if you like? You'll just need to fit an 030 to it. (Once I've got it booting that is)

Ohhh sounds nice :) I think I got a 030 somewhere :)

Ok, let me fix it and it's yours.

PhilC wrote: 27 May 2019 16:29 Ok, let me fix it and it's yours.

Sweet. Then I can rip apart TF's firmware and re-write it all, all in a language I never used before 8-) :lol: