Search found 90 matches

by Zarchos
Wed Dec 13, 2017 6:49 pm
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

Do you know what the FPGA uses to be able to have multiplcation completed in 1 cycle ?
I am intrigued, really.
by Zarchos
Wed Dec 13, 2017 4:22 pm
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

Except to shift 1 position only 8-) but ok it doesn't optimise anything, except it'll make the source easier to reuse on another 680x0 system ;-)
by Zarchos
Wed Dec 13, 2017 3:47 pm
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

Dave, by the way, it is likely that just adding cache to the Q68 would result in higher average performance than even a good 68030 system. This is because the 68030 needs minimum 2 cycles for a primitive instruction, while the Q68 needs only one (if run from cache or fast RAM). Also, for example, t...
by Zarchos
Tue Dec 12, 2017 4:25 pm
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

OK thanks.
Slightly but surely I understand more about the complexity of accelerator boards as far as the QL is concerned.
by Zarchos
Tue Dec 12, 2017 2:21 pm
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

There is a VHDL wizzard, Stephen Leary, aka TerribleFire, who has been working on FPGA 68000 core accelerator boards for the Amiga and the ST. I believe his boards could work with the 68000 based accelerator boards available for the QL. I don't have the time for a detailed look, but those seem just...
by Zarchos
Tue Dec 12, 2017 11:08 am
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

Re: TerribleFire accelerator for the QL accelerator card

I believe Stephen is quite an helpful guy, and he would be happy to answer your questions.
If sbdy has an EAB account, you can easily reach him from this web site.
by Zarchos
Tue Dec 12, 2017 8:16 am
Forum: Hardware
Topic: TerribleFire accelerator for the QL accelerator card
Replies: 30
Views: 634

TerribleFire accelerator for the QL accelerator card

Hi all. I haven't seen it on this board, so I start this thread. There is a VHDL wizzard, Stephen Leary, aka TerribleFire, who has been working on FPGA 68000 core accelerator boards for the Amiga and the ST. I believe his boards could work with the 68000 based accelerator boards available for the QL...
by Zarchos
Tue Dec 12, 2017 7:06 am
Forum: Software & Programming
Topic: Q68 Powered Arcade Game
Replies: 42
Views: 1421

Re: Q68 Powered Arcade Game

I am sorry but, to me, a standard QL won't have games like what can be found on the ST / Amiga. I do not know what can be achieved will the accelerator cards (I own a few, but never coded to check speed), or the QL clones, but porting from the Q68 source could be worth the effort. We will see. That ...
by Zarchos
Mon Dec 11, 2017 10:45 pm
Forum: Hardware
Topic: Hardware of the Q68 and programming examples
Replies: 9
Views: 402

Re: Hardware of the Q68 and programming examples

I'd be more interested in this, if there first was an actual game, and the optimization done later. ;) Ideal candidate, to me, is Pacmania. Simple and addictive. Understanding the code shouldn't be too difficult, and porting it to the Q68 could be, again, a great community project. You know which s...
by Zarchos
Mon Dec 11, 2017 10:11 pm
Forum: Hardware
Topic: Hardware of the Q68 and programming examples
Replies: 9
Views: 402

Re: Hardware of the Q68 and programming examples

- accessing directly the hardware can help save some precious CPU cycles and have mode change fast enough, using your 40 Mhz timer, to get that with a scanline precision. Sorry, I was not aware you want to switch video modes in realtime while the picture is built. Sounds crazy, but might actually w...

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