Search found 82 matches

by Ti_
Sun Apr 07, 2019 8:13 pm
Forum: Video Display Processor
Topic: Help scale and rotation sega genesis
Replies: 33
Views: 6093

Re: Help scale and rotation sega genesis

"Rock n' Roll Racing Hack v16beta" rotation:
Software: https://youtu.be/9SdOBw-8VQU
Hardware(with sega-cd): https://www.youtube.com/watch?v=AxFOkC1cCLg
by Ti_
Sun Mar 24, 2019 7:32 am
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

Would be nice to have a version showing speed from different area : ROM / RAM / comm registers... :) You might add more speed tests for the sub cpu showing the speed in program ram vs word ram vs communication regs. Here's a new version, now can select different areas: Also sub-cpu now shows correc...
by Ti_
Tue Mar 19, 2019 9:11 pm
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

I made it from VRAM... (filled all vram with code: add_tacts add.l d2,d0 bra.s add_tacts). also 'rte' after v-int, was replaced with manual returing (in 50% happens returning to $c00002 but with first opcode?) test non-repeatable , goes only 2 seconds: , after I load numbers to vram to show result. ...
by Ti_
Mon Mar 18, 2019 8:54 pm
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

Got 7,645 by code executing from a12010-a12013 (scd registers area):
also tested $200000 (sram) and $600000 (scd word-ram) - 7,525 same as rom.
by Ti_
Sun Mar 17, 2019 8:26 pm
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

"Ram" version:

Tested - yes, it even more slowly:
by Ti_
Sat Mar 16, 2019 12:34 pm
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

Test goes 1 second, counter - 50 vblanks for PAL, and 60 vblanks for NTSC. Code executed from ROM.
About RAM I did not know, maybe I will do this too.
by Ti_
Sat Feb 16, 2019 11:04 am
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Re: Cpu speed test rom (md+scd)

Yes, it's count number of cycles for 1 second, then repeat again.
for gfx processor it's repeats 128x128 conversion in a loop.
by Ti_
Sat Feb 16, 2019 10:14 am
Forum: Demos
Topic: Cpu speed test rom (md+scd)
Replies: 19
Views: 3988

Cpu speed test rom (md+scd)

screenshot from asian md2 + mega-cd 2. (mega everdrive 1)
by Ti_
Tue Jun 13, 2017 5:03 pm
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 35735

Re: SEGA CD Mode 1

Sik wrote:...OK I think now that I'm looking at the docs I see the problem. Does anybody know what's the BIOS call you need to use to tell if a track is being played? (・・?)
Or get track time, and use it as counter to start next track.
by Ti_
Sun Jun 11, 2017 7:24 am
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 35735

Re: SEGA CD Mode 1

Still boils down to the same case, you just need a random number when you're going to decide which track to play next. No, I not just need a 'random number'. I need to know that one track stops playing, to start playing next. How can I do it? EDIT: also wait, seeing what post you quoted, are you co...
by Ti_
Sun May 28, 2017 6:15 am
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 35735

Re: SEGA CD Mode 1

No. I don't need to start play random track once\repeated\or from random track to last track.
I ask for random-B mode (when track ends, next is random) - infinite disk play.
by Ti_
Sat Jun 18, 2016 11:35 am
Forum: Mega/SegaCD
Topic: SEGA CD Mode 1
Replies: 46
Views: 35735

Re: SEGA CD Mode 1

Chilly Willy wrote: Controls:
A - play from current track to end of disc
B - play current track once
C - stop playing
X - show current track info
Y - play current track repeatedly
Z - pause/resume
START - check disc
How can I make "play random track?" (same as RANDOM-B in Japanese bios player?)
by Ti_
Fri Jan 01, 2016 1:59 pm
Forum: Megadrive/Genesis
Topic: Question on SRAM
Replies: 14
Views: 5078

Re: Question on SRAM

On Mega Everdrive (with 16-bit sram) most(or all) byte instructions doesn't work on odd addresses.
by Ti_
Fri Mar 20, 2015 2:29 pm
Forum: Demos
Topic: GEMS Jukebox
Replies: 42
Views: 10238

Here's my compilation for r57shell's player: Tracklist: Vectorman 1, Earthworm Jim 2, Doom Troopers, Comix Zone, Dune2. gems_compilation_wip.rar Some bugs of GEMS_Player.bin: Some wrong in rom header, code starts from (0x1F4 instead of 0x200). When you play combined song (example: DT: Nero) , and if...
by Ti_
Fri Nov 22, 2013 6:38 pm
Forum: Megadrive/Genesis
Topic: Determining the timing of a piece of code
Replies: 36
Views: 7041

Anyway, there is so many emulators, and no method to get timings of code chunk :( Gens standart debugger shows how cycles each command takes. ) hotkey 't' is step into. O_o ? Did i put that feature ?? I only remember about execute 1/10/100/1000 instructions shortcut but nothing about cycles... Yep,...