Search found 178 matches

by notaz
Mon Oct 01, 2018 11:24 am
Forum: Megadrive/Genesis
Topic: IO access differences in MD mode vs SMS
Replies: 4
Views: 197

Re: IO access differences in MD mode vs SMS

AFAIK PORT accesses are not doing anything in MD mode.
by notaz
Mon Aug 27, 2018 9:11 am
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 234
Views: 17767

Re: Tänzer, a "ninja" game (Dev Diary thread)

VDP_waitVSync(); colorCyclePressStart(colorCycleTimer++); All that other function do is a few VDP_setPaletteColor. I get CRAM dots somewhere around line 192...what's up with that? Uninformed guess (since I don't know if you are using interrupts): You wait for vsync, vblank flag gets set, VDP_waitVS...
by notaz
Mon Mar 19, 2018 12:47 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 234
Views: 17767

Re: Unnamed "ninja" game (Dev Diary thread)

If your build process keeps the elf file you can do "addr2line -e yourgame.elf 42c0" to find the line of code, or you can look up the address in the map file. Not sure if SGDK produces those, I use custom makefiles for my stuff.
by notaz
Mon Feb 05, 2018 3:01 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 234
Views: 17767

Re: Unnamed "ninja" game (Dev Diary thread)

mix256 wrote:
Mon Feb 05, 2018 2:08 pm
Yeah, want to go the "non-soldering" route, if I can. Because I really suck at it and is close to blind...or something.
Is running through the internet for PCB suppliers now, so far I've got these:
*shameless plug*
viewtopic.php?f=21&t=2635
by notaz
Mon Nov 06, 2017 1:56 pm
Forum: Super 32X
Topic: "The Question" ported to 32X
Replies: 19
Views: 1996

Re: "The Question" ported to 32X

Chilly Willy wrote:
Sun Nov 05, 2017 5:50 pm
EDIT2: The current NeoMyth menu mirrors rom data to make certain games work that expect mirroring.
Could you share an example of such a game?
I'm not aware of any games that are relying on mirroring.
by notaz
Sun Oct 01, 2017 11:03 pm
Forum: Video Display Processor
Topic: vcounter corruption
Replies: 3
Views: 1431

vcounter corruption

I don't remember if this has been reported, but if you read the vcounter at the moment it's changing (presumably?), you'll get a corrupted value. Usually bit1 is set when it shouldn't be, at least on my VA6 MD1. It's very rare, but if you do reads in a tight loop, you'll get up to several bad reads ...
by notaz
Wed Sep 20, 2017 7:48 pm
Forum: Megadrive/Genesis
Topic: Undefined behavior for ABCD and SBCD
Replies: 36
Views: 6849

Re: Undefined behavior for ABCD and SBCD

Small update to flamewing's test to trigger a bug in Genesis-Plus-GX at least:
https://github.com/flamewing/68k-bcd-ve ... e3afd720bf
http://notaz.gp2x.de/md/rel/bcd-verifier-u1.zip
by notaz
Wed Sep 13, 2017 9:46 pm
Forum: Megadrive/Genesis
Topic: M68k opcode sizes test ROM
Replies: 19
Views: 2470

Re: M68k opcode sizes test ROM

r57shell wrote:
Wed Sep 13, 2017 3:09 pm
Here is test new version: http://www.mediafire.com/file/jl2227tc4 ... s_test.bin
Tell me if it fails or success.
It's fine now on MED but on raw flashcart it still black screens ~80% of the time.
by notaz
Wed Sep 13, 2017 2:37 pm
Forum: Megadrive/Genesis
Topic: M68k opcode sizes test ROM
Replies: 19
Views: 2470

Re: M68k opcode sizes test ROM

I'd say there is no benefit of handling warm boot differently in a test like this, unless you want to also test effects of reset.
by notaz
Sun Sep 10, 2017 8:47 pm
Forum: Megadrive/Genesis
Topic: M68k opcode sizes test ROM
Replies: 19
Views: 2470

Re: M68k opcode sizes test ROM

Yes it's a proper German MD1: http://notaz.gp2x.de/img/hw/megadrive_model1.jpg Note that I also have MegaCD + 32X attached, I know those have effect on open bus at least. The purple screen is on a Mega Everdrive v1, consistently getting it every time on the same spot. I haven't seen any other proble...
by notaz
Sun Sep 10, 2017 2:45 pm
Forum: Megadrive/Genesis
Topic: M68k opcode sizes test ROM
Replies: 19
Views: 2470

Re: M68k opcode sizes test ROM

The purple screen means failure, right?
This is what I get on my PAL MD with Hitachi 68k:
http://notaz.gp2x.de/img/mess/megadrive ... _sizes.jpg
by notaz
Tue Jun 13, 2017 3:52 pm
Forum: Collaboration
Topic: dragonbox.de cartridge production service
Replies: 4
Views: 770

Re: dragonbox.de cartridge production service

themrcul wrote:With the custom cart you are developing, I assume it will have save capability in it? And what is the largest ROM size you are targeting? (hopefully 4MB will be enough for this project).
Yes, 4MB with saves is the goal.
by notaz
Mon Jun 12, 2017 8:56 pm
Forum: Collaboration
Topic: dragonbox.de cartridge production service
Replies: 4
Views: 770

dragonbox.de cartridge production service

In support of homebrew development, dragonbox.de is announcing cartridge production service. The set includes: the PCB (up to 4MiB, currently the one from krikzz , but custom one is in development) plastic shell for the PCB (black or transparent) with a sticker instruction manual paper box packaging...
by notaz
Sun Apr 23, 2017 4:55 pm
Forum: Demos
Topic: Star J - new SHMUP for Genesis
Replies: 17
Views: 3646

Re: Star J - SHMUP in development

MD1 VA6 TMSS with all addons here, but not much time, so could run your (or anyone's) stuff once a week or so...
You may want to try sega-16 or everdrive forums to find someone more dedicated.