Search found 2755 matches

by Chilly Willy
Sat Apr 06, 2019 1:52 pm
Forum: Exodus
Topic: Active Disassembly - Post Processor
Replies: 14
Views: 906

Re: Active Disassembly - Post Processor

I use the Amiga program "ReSource" to disassemble MD games. It doesn't handle Z80, but that's rarely an issue. It's VERY easy to deal with 68000 code and data mixed as it is in MD roms. Well, I always thought it was easier than IDA. And cheaper.

http://amiga-dev.wikidot.com/tool:resource
by Chilly Willy
Sat Apr 06, 2019 1:48 pm
Forum: SGDK
Topic: dealing with matrices (arrays)
Replies: 52
Views: 6351

Re: dealing with matrices (arrays)

Game looks pretty cool. The purple colored skin is a bit odd, but Sega is chock-full of odd characters. :lol:
by Chilly Willy
Thu Apr 04, 2019 8:20 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 35588

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

Sounds like one of those "old MD1" problems. Certain older console revs seem to have issues that were later fixed. I've seen them talked about over on discord.
by Chilly Willy
Wed Apr 03, 2019 1:01 am
Forum: Cartridge
Topic: EEPROM mapping for homebrew
Replies: 9
Views: 958

Re: EEPROM mapping for homebrew

That's nice. Always wondered what some of those bits were for. Yeah, I'd say using the reserved bits for something like a shift value would probably be the way to go.
by Chilly Willy
Wed Apr 03, 2019 12:53 am
Forum: MegaLD
Topic: MegaLD Dumping Project
Replies: 73
Views: 37695

Re: MegaLD Dumping Project

Another good question is - is this standard vblank data as specified for closed caption and other uses?

https://en.wikipedia.org/wiki/EIA-608
by Chilly Willy
Tue Apr 02, 2019 5:19 pm
Forum: SGDK
Topic: Timer interrupts
Replies: 10
Views: 950

Re: Timer interrupts

There ARE timers on the YM2612, but in their infinite wisdom, SEGA didn't connect the INT line from the 2612 to the Z80. People still use the 2612 timers in some cases, but it won't interrupt the Z80 or 68000, so you have to poll it periodically. Given most games don't need that kind of timing, near...
by Chilly Willy
Tue Apr 02, 2019 1:43 pm
Forum: Cartridge
Topic: EEPROM mapping for homebrew
Replies: 9
Views: 958

Re: EEPROM mapping for homebrew

Having a custom EEPROM spec for homebrew is probably a good idea. Most existing EEPROM games use a single byte at $200001, and it's reflected in the header. Emulators, and the NeoMyth menu, generally look for a save ram space of one byte to auto-select EEPROM mode as no actual battery backed up ram ...
by Chilly Willy
Tue Apr 02, 2019 1:23 pm
Forum: MegaLD
Topic: MegaLD Dumping Project
Replies: 73
Views: 37695

Re: MegaLD Dumping Project

Nice summary. That's a LOT of work! ld-decode looks like a good long-term solution, but have you thought about a short-term makeshift of capturing the vblank data separate from the video? Pair that with a standard capture card might get you going until ld-decode works out the bugs.
by Chilly Willy
Mon Apr 01, 2019 3:27 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 35588

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

Funny, page 7 IS cut off. Didn't notice, but then I rarely ever look at game manuals, and when I do, it's only the controller mapping page. :lol: I've run the demo for over half an hour on both my Nomad and my Gen2/CD2/32X without a crash. I'd say it's either the cart or his 32X. One of my 32Xs will...
by Chilly Willy
Sat Mar 30, 2019 1:32 pm
Forum: Video Display Processor
Topic: Help scale and rotation sega genesis
Replies: 33
Views: 3784

Re: Help scale and rotation sega genesis

Most emus, and the Mega EverDrive and MD Pro flash carts. The rest have only byte-wide save ram. You could fetch byte-wide save ram via movep to avoid the issue, but that would slow the routines a bit.
by Chilly Willy
Fri Mar 29, 2019 11:40 am
Forum: Announcement
Topic: Tanglewood - now on Kickstarter!
Replies: 19
Views: 6437

Re: Tanglewood - now on Kickstarter!

Got my Tanglewood cart yesterday. I love having a nice case and a physical cart. Very nice quality item, well worth the money to any Sega enthusiast. And coming right on the heels of my Tanzer cart arriving, it's like Christmas in March! :D
by Chilly Willy
Thu Mar 28, 2019 8:11 pm
Forum: Video Display Processor
Topic: Help scale and rotation sega genesis
Replies: 33
Views: 3784

Re: Help scale and rotation sega genesis

Very nice. Amazing what you can do on the Genesis with a bit of effort.
by Chilly Willy
Wed Mar 27, 2019 3:37 pm
Forum: Blabla
Topic: New EU copyright directive
Replies: 2
Views: 550

Re: New EU copyright directive

I imagine at this point, most people are going to take a wait and see stance on this. I really hope it doesn't affect SpritesMind - it's my home away from home. :D
by Chilly Willy
Tue Mar 26, 2019 1:24 pm
Forum: Blabla
Topic: New EU copyright directive
Replies: 2
Views: 550

New EU copyright directive

Given the passage of the new EU directive with both articles 11 and 13, how long until the forum is removed? I rather doubt SpritesMind can afford a filter, nor spend the time manually approving every post. It's too bad, but all our EU friends are going to be lost for the next few years until they c...
by Chilly Willy
Sun Mar 24, 2019 5:43 pm
Forum: Mega/SegaCD
Topic: Compiling a bootable ISO?
Replies: 5
Views: 1377

Re: Compiling a bootable ISO?

Oh, shoot, so it's actually a little of both then? The BIOS automatically loads some code for both CPUs, but it's limited to a small enough amount that the real bulk of the *actual* program needs to then be loaded BY that initial program? Yes, exactly. What is the actual limitation that determines ...