Search found 5 matches

by mk79
Mon Mar 04, 2019 5:02 pm
Forum: MiST
Topic: Sinclair QL
Replies: 62
Views: 24537

Re: Sinclair QL

slingshot wrote:What requires that much of BRAM?
240kb for VRAM alone (Aurora graphic modes). 128kB for ROM images and various other stuff. Had to rewrite the MDV code to use DDRAM to make space.
by mk79
Mon Mar 04, 2019 1:52 pm
Forum: MiST
Topic: Sinclair QL
Replies: 62
Views: 24537

Re: Sinclair QL

Somebody on the MiSTer forum managed to change the CPU to FX68K, maybe someone who wants to develop on MiST (dream on), should ask for it, and port it. That was me. The MiSTer QL core will get a major upgrade from me, but as far as I can see the MiST's Cyclone III is too limited for any of the new ...
by mk79
Thu Feb 14, 2019 8:11 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 38
Views: 14018

Re: FX68K Cycle accurate 68000 core

But the bug seems to affect the previous operation before applying the decimal correction factor. Will send you a fixed code to test it later if you can. Please watch your PM. Apparently I don't have the right to answer via PM (yet), but I have tested the patch now and it works as expected, thank y...
by mk79
Wed Feb 13, 2019 1:32 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 38
Views: 14018

Re: FX68K Cycle accurate 68000 core

This might be a bit off topic, but running stable for days is not the correct way to verify a core. You have to make a proper timing analysis. Of course you're right, but that's the point where I'm out of my depth, knowledge wise. On the other hand, for a pure fun hobby project without any service ...
by mk79
Sun Feb 10, 2019 11:40 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 38
Views: 14018

Re: FX68K Cycle accurate 68000 core

Thanks a lot for this core! Without any prior knowledge of FPGA development I eventually managed to integrate FX68K into MiSTer's Sinclair QL core. 25 years ago I've developed a 68k emulator and I'm the main developer of the current QL operating systems, so I'm generally comfortable with logic, but ...

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