Search found 75 matches

by keli
Wed Sep 06, 2017 12:53 pm
Forum: ALPHA DEVELOPMENT INFO
Topic: CURRENT SCHEMATIC
Replies: 7
Views: 2064

Re: CURRENT SCHEMATIC

How does the RAM circuit select between the upper and lower half of its 32 bit data bus? I looks like you've just connected each pin of the 16 bit bus twice.
by keli
Tue Sep 05, 2017 12:37 pm
Forum: STE V1 32MHz BOOSTER
Topic: STE BOOSTER POWERED BY ALTERA TEST
Replies: 7
Views: 2447

Re: STE BOOSTER POWERED BY ALTERA TEST

First of all, excuse me if this has been discussed before, but I have a few questions about speed throttling and the asynchronous nature of the 68000 bus. I notice that all of your boosters (and most other solutions I've seen floating around on the net*) work by lowering the CPU clock frequency when...
by keli
Mon Sep 04, 2017 3:35 pm
Forum: CHAT FORUM
Topic: cool retro music tune
Replies: 11
Views: 2138

Re: cool retro music tune

exxos wrote:
Mon Sep 04, 2017 3:10 pm
Pretty cool :)

There is Atari Music Network for music promotion. Oddly it seems to get huge amounts of traffic, even though it also seems to have been dead for years :shrug:
Well mine was not really made on an Atari, just a YM2149 emulator (not even a full ST emu) on a PC.
by keli
Mon Sep 04, 2017 3:04 pm
Forum: CHAT FORUM
Topic: cool retro music tune
Replies: 11
Views: 2138

Re: cool retro music tune

BEGIN blatant self-promotion

I recently YM2149-ified one of my compositions. Even though it's not recorded off authentic hardware, I'm pretty pleased with the results:



END self-promotion;
by keli
Thu Aug 24, 2017 10:05 am
Forum: HARDWARE DISCUSSIONS
Topic: BLITTER RE-CREATION THOUGHTS
Replies: 225
Views: 28258

Re: BLITTER RE-CREATION THOUGHTS

I've been scratching my head over these schematics as well. The STE glue/MMC combo schematics contain similar weirdnesses. I think you're right in assuming the multiple inverters were added to fine-tune timing issues and as buffers for fan-out of some signals. (Even though a buffer would have done t...

Go to advanced search