Search found 69 matches

by MrD
Sun Feb 02, 2014 4:04 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

I'm still getting a garbled display on my own PAL Mega Drive 1 when loading the instmaker from my custom EEPROM-based PCB. I'm fairly sure it's not a problem with my hardware as UWOL The Quest for Money runs flawlessly from it, as does Gigasoft MD Music Demo 1 . I'm getting a screen of garbage chara...
by MrD
Wed Jan 29, 2014 7:46 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Thanks, I'll take a look. I don't have a MED so I probably won't implement it though.
by MrD
Wed Jan 29, 2014 7:11 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Where would be the best place to read about that interface?
by MrD
Wed Jan 29, 2014 5:03 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

This version has the background and won't crash in Regen.

http://www.mrdictionary.net/stuff/2014/ ... tmaker.zip
by MrD
Wed Jan 29, 2014 2:22 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Wow, that background looks amazing! I'll get to work in integrating it right away. Thank you very much for the test in hardware as well! I noticed that I'd done something that made Regen unhappy, but it worked in Fusion. A Regen crash usually means I've not balanced the stack correctly or somehow ex...
by MrD
Tue Jan 28, 2014 11:14 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

I had no idea. It's good to know that I'm in the presence of an expert. :) I only briefly looked at the available FM related tools when I started porting my Master System Z80 player (anybody play Gravity Beam Master Gaiden ? :P) to the Mega Drive a few days ago. I wanted the smallest, easy to use op...
by MrD
Tue Jan 28, 2014 4:16 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Yep, I figured it out, but thanks for taking a look at it anyway. I hope it's useful to anybody who quickly needs to be able to test basic static FM voice patches on the real-deal system. I use a free VST called VOPM to do this in Windows (and a free program called vsthost to run the VST like a stan...
by MrD
Sun Jan 26, 2014 6:11 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Okie dokie, so the DT1 MUL...SSG-EG value block has the operators 2 and 3 switched round. I was working from this when I wrote the original program, which doesn't say that.

Here's the fixed version if anybody is curious and wants to quickly poke some FM values.
by MrD
Sun Jan 26, 2014 5:18 pm
Forum: Sound
Topic: Help with setting FM patch values
Replies: 34
Views: 18749

Help with setting FM patch values

Hi, I'm writing a music player for the Mega Drive, but I'm having some unusual problems that I don't understand. I've written a simple FM patch editor which exposes all the values for the operator lines so I can make new instruments and see what they sound like. ( zip ) A and B increase or decrease ...