Search found 86 matches

by mikejmoffitt
Tue Oct 06, 2015 11:06 pm
Forum: SGDK
Topic: Spliting into several source files.
Replies: 8
Views: 2058

Re: Spliting into several source files.

For reference, the reason "inc" works is because the Makefile is adding it to the header search path. You could have added -Ihed to your Makefile, but 'inc' and 'include' are de-facto standard names so it is best to use those. Your project root would have worked as well but it's more organized to ke...
by mikejmoffitt
Tue Oct 06, 2015 11:03 pm
Forum: SGDK
Topic: Light init?
Replies: 5
Views: 1834

Re: Light init?

I see; I'll look into modifying it myself then. As for internal functions which rely on it, I'm really only using SGDK for these things: -Init the VDP -Set up some VDP registers for configuration (Plane / sprite table locations, display width/height, etc) -Perform a DMA Everything else I am doing ma...
by mikejmoffitt
Tue Oct 06, 2015 12:35 am
Forum: SGDK
Topic: Spliting into several source files.
Replies: 8
Views: 2058

Re: Spliting into several source files.

That is absolutely fine and considered best practice for splitting code across areas of functionality and data. You will want a header for every source file you create to declare your functions and data structures. This tells the compiler "there exist these functions" so when other files #include yo...
by mikejmoffitt
Mon Oct 05, 2015 9:10 pm
Forum: SGDK
Topic: SGDK Linux with limited internet.
Replies: 1
Views: 1075

Re: SGDK Linux with limited internet.

I know I am late, but if you can get to a 64-bit machine I put together a package of a prebuilt Gendev+SGDK setup for Linux 64-bit.

http://csh.rit.edu/~moffitt/gendev64/
by mikejmoffitt
Mon Oct 05, 2015 8:55 pm
Forum: SGDK
Topic: Light init?
Replies: 5
Views: 1834

Light init?

I like using SGDK for ease of some hardware functions but there is a lot going on I'd like the ability to disable. Is there an easy way to disable the following without modifying SGDK? -Transfer of font into VRAM; subsequent linking of font into ROM (little bit of space saving) -Ext, V, or H interru...
by mikejmoffitt
Thu Oct 01, 2015 4:26 pm
Forum: Sound
Topic: New Documentation: An authoritative reference on the YM2612
Replies: 859
Views: 507937

Re: New Documentation: An authoritative reference on the YM2612

I played with clocking the YM2612 with a function generator. At a VERY low frequency it seemed to lose its internal state, and it may have been around 1/4. The use of DRAM would explain that. Naturally a high speed clock caused issues as well, though it went remarkably high before issues appeared.
by mikejmoffitt
Wed Sep 30, 2015 4:34 pm
Forum: Collaboration
Topic: Chaos Tracker (formerly YMDj/Prodigy) Genesis/MD/32x/SegaCD
Replies: 2
Views: 4802

Re: Chaos Tracker (formerly YMDj/Prodigy) Genesis/MD/32x/SegaCD

I'm fully interested in this. If you are going to be doing any of this in C, I'd be interested in contributing if you are looking for collaborators.
by mikejmoffitt
Tue Sep 29, 2015 9:16 pm
Forum: Megadrive/Genesis
Topic: What happens if the VBLANK int code takes too long?
Replies: 2
Views: 1269

Re: What happens if the VBLANK int code takes too long?

I don't remember if that is what will happen in that situation, but one solution is to have your vblank routine set a flag that vblank is active, which will let your main code spin on that flag until VBlank sets it, at which point your vblank logic can occur.
by mikejmoffitt
Tue Sep 29, 2015 6:46 pm
Forum: Hardware
Topic: Potentiometer Genesis Overclocking and ramifications.
Replies: 3
Views: 5678

Re: Potentiometer Genesis Overclocking and ramifications.

I clocked my YM2612 with a function generator. It did exactly what you expected - controlling output frequency. I suspect the envelope generator will be scaled accordingly as well.

https://www.youtube.com/watch?v=ve5YBiFyLX4
by mikejmoffitt
Mon Sep 28, 2015 4:34 pm
Forum: Sound
Topic: Sega CD Mode 1 support functions for SGDK
Replies: 25
Views: 12002

Re: Sega CD Mode 1 support functions for SGDK

I'm just calling it what people are already calling it, I don't care what name it's given as long as it's consistent.
by mikejmoffitt
Sat Sep 26, 2015 9:48 pm
Forum: Sound
Topic: Sega CD Mode 1 support functions for SGDK
Replies: 25
Views: 12002

Sega CD Mode 1 support functions for SGDK

Hi everyone, first post here but it looks like the place to go for Sega development. I've been working on porting Lyle in Cube Sector to Sega Genesis and I thought it would be neat to offer the ability to put in a deluxe soundtrack CD to get the original game audio, so I set about implementing Mode ...