Search found 88 matches

by tomaitheous
Sat Jul 19, 2014 4:18 am
Forum: PC-Engine
Topic: Hardware Resources
Replies: 6
Views: 4284

Re: Hardware Resources

That's what my tests showed. I did writes to vram (ST1/2 opcodes), incremented a counter, and used the Timer interrupt to measure this for active display VS vblank area. I saw no difference in speed. Even with ST2 opcodes (writes to MSB only), the cpu can't saturate all the access slots of the VDC p...
by tomaitheous
Sat Jul 19, 2014 4:02 am
Forum: PC-Engine
Topic: new version of HuC!
Replies: 8
Views: 3143

Re: new version of HuC!

Ahh ok, I see. It is. But, there's a possible incompatibility with old PCEAS generated code here; local label names used in high lever expressions. I added the ability to do .- and .+ (.+, .++, .---, .----, etc) for local labels. And you can use this just fine in expressions.. *IF* you use a space. ...
by tomaitheous
Tue Jul 15, 2014 10:54 pm
Forum: PC-Engine
Topic: new version of HuC!
Replies: 8
Views: 3143

Re: new version of HuC!

Did some of the PCEAS bugs get fixed as well? Specifically, the bug where if an opcode of more than 1byte, crosses a 8k page boundary.
by tomaitheous
Tue Jul 15, 2014 10:40 pm
Forum: PC-Engine
Topic: Hardware Resources
Replies: 6
Views: 4284

Re: Hardware Resources

The VDC has more CPU vram access slots during active display, then what the cpu can saturate. But if there's a slight out of alignment, the cpu will be stalled for a 'master clock' time slice. Of course, that's on the latch (MSB) and there's ~supposed~ to be a 1 word buffer as well. So to the progra...
by tomaitheous
Thu Jan 02, 2014 6:03 pm
Forum: PC-Engine
Topic: [Maps] Son Son II
Replies: 4
Views: 2391

Re: [Maps] Son Son II

This is great info. Thanks for posting this :D
by tomaitheous
Tue Dec 31, 2013 8:11 pm
Forum: PC-Engine
Topic: ZEdit: the ultimate PCE dev tool
Replies: 54
Views: 14989

Re: ZEdit: the ultimate PCE dev tool

No download link??
by tomaitheous
Tue Dec 31, 2013 7:52 pm
Forum: PC-Engine
Topic: [Tools] Etripator
Replies: 17
Views: 6644

Re: [Tools] Etripator

Have you thought about doing a tracer? It's part dissassembler and part cpu emulator. It basically starts from the reset vector, and follows every possible code path it can take. I started writing one many years ago, but it quick quite complex.
by tomaitheous
Wed Feb 08, 2012 1:49 am
Forum: PC-Engine
Topic: Problem with _cd_execoverlay
Replies: 10
Views: 3538

Re: Problem with _cd_execoverlay

Can you give a small example code so I can look at it? Doesn't have to be your current game WIP code.
by tomaitheous
Tue Jan 31, 2012 3:07 am
Forum: PC-Engine
Topic: Problem with _cd_execoverlay
Replies: 10
Views: 3538

Re: Problem with _cd_execoverlay

Ok, so what's the problem? CD_EXEC bios function won't load to bank $68 or $69 (00 or 01)?
by tomaitheous
Sun Jan 29, 2012 8:29 pm
Forum: PC-Engine
Topic: [TOOLS] PCEas design document.
Replies: 5
Views: 2996

Re: [TOOLS] PCEas design document.

No problem :)