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Re: I de-CQMed my AWE32 PnP CT3990...!

Posted on 2022-11-05, 06:19

I see those chips can be bought. If values for the passives are known it can be done. I've got a CT3600 with CQM. I'm certainly capable of the soldering, but that card just never shined for me. My understanding is that it has to do with TSR and protected mode games, being useless unless implemented …

Re: 16-bit ISA EGA card?

Posted on 2022-11-05, 04:47

Thanks for the history lesson, you guys, definitely something I didn't know. The upgrade path certainly makes sense. I have heard the term "MDA" before, but being a text-only output I never gave it much thought, and didn't remember it's specs. Do you know why IBM chose 350 lines for MDA? As the EGA …

SC-55 questions

Posted on 2022-11-05, 04:08

Newly-minted SC-55 owner here. Got various questions. I daily-drive a 10-year old PC with no MIDI or joystick interface. The newest discrete sound card I have in a pile is an EMU10K-powered (terrible digital resampling) CT4780 SB Live!, think I could get the MIDI interface on that play ball with …

Re: 16-bit ISA EGA card?

Posted on 2022-11-04, 05:25

there's two signals (!IOCS16 and !MCS16) that the card signals in response to IO or memory cycle to turn them from 8bits to 16bit. When you do a 16bit or even a 32bit out, you get it automagically transformed into two or four 8 bit transactions, unless the card signals that it'll be able to take …

Re: 16-bit ISA EGA card?

Posted on 2022-11-04, 02:41

EGA is a bunch of custom stuff like VGA Many programmers didn’t move video data 16 bits at a time even with vga Curious, since there are 8-bit VGA cards, how does a 16-bit data transfer work, or rather how is it negotiated? This is conceptually important for me to understand for my project. How do …

16-bit ISA EGA card?

Posted on 2022-11-03, 23:54

I've been wondering why most EGA cards weren't made for 16-bit ISA, as they debuted in AT systems with 16-bit ISA bus. Considering the amount of memory (128KB or more for 16 colors at 640x350 resolution) an EGA card can have it's odd that they were given only an 8-bit bus. There are lots of dual …

Re: Anybody tried this with your MT-32?

Posted on 2022-10-29, 05:07

I also tried it with Heretic but that was a miss for me, granted most devices don't sound great in that game, there are only a few soundfonts that I like with it, otherwise OPL3 is better for that one. Bit of a derail, but IMHO the best module for Heretic is the Roland JV-1010. Huh, thanks for the …

Differences between MT-32 variants

Posted on 2022-10-29, 03:24

Was looking at the compatibility table on Wikipedia, these things seem to be somewhat problematic between the two major revisions of MT-32 and CM/LAPC-I. Some games work better with old, some with new, and some with other flavors. Has anyone come up with modifications that would make, say, the new …

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