So I've also been taking a look at the DMA capable P82C612. This is what the MCA Sound Blaster used so I've been seeing if maybe it could be used to make something more capable than an adlib clone. So far I've been playing with the idea of connecting it to something like an ES1668 which is what the …

So based on what's been said so far here's an updated version: https://i.imgur.com/kQX3WXc.png

Well it's not just the POS stuff it simplifies, it's intended to make it easy to convert ISA boards to MCA by converting MCA signals into ISA style signals. While for the Adlib it might be overkill, my thought process was figuring it out might be enough of a learning process to try something a bit …

So if I remember correctly it is possible to make a "dumb" MCA card that does nothing in the POS. I think you'll find that's what the Roland MPU-IMC does.

So I've been messing around with KiCAD lately as I've been reading into some of the MCA documentation, the datasheets for hte P82C611/612, as well as looking into the schematics for the Adlib clone available here: http://www.malinov.com/Home/sergeys-projects/isa-opl2-card I think I might have come …

So using QEMM 7.3 and SoftMPU 1.91 I was able to get Warcraft 2 to work on my Roland SC-88 over the Serial Connection on my IBM PS/2 Model 50 486. That surprised me quite a bit as things like Doom didn't work which I expected after hearing that protected mode games didn't work. All I did to get …

So I've been looking at other MCA sound cards as well and I'm starting to think the Sound Piper might not be a bad choice to look at either for making a clone or using it as guidance for making a new MCA sound card entirely. Looking at it, it uses either an ES688 with an OPL3 chip or the later …

On the subject of an MCA bus board, after some reading I'm not sure how useful it would really be. The main issue being IRQ 9 is used by the hard drive controller in the PS/2 systems, and some games are hardcoded to use IRQ 2/9. Honestly even if it was no better or worse than the original Roland …

Hmm, actually after looking at the bus spec and the MPU-IMC schematic, this looks deceptively simple. The biggest worry I had was implementing the automatic configuration stuff, but it seems that Roland just provides a card ID to the system and otherwise doesn't support "soft" configuration the I/O …

For those who don't know this is the IBM Microchannel version of the MPU-IPC-T. With this information is it at all possible an MCA version of HardMPU could be made? Doesn't look especially difficult. When life calms down a bit (in the next month or so probably) I may have to look at getting a …

Keropi requested we don't discuss an MCA MPU-401 compatible in the Music Quest topic. I hope this is the correct topic for it :-). I just wanted to clarify my post there, as I wasn't clear enough. UART MPU-401 might be possible with 74series logic but good luck implementing the Roland features with …

Keropi, would you at all be interested in doing a Microchannel version of this card? I agree with the people in the vcfed thread who think that a HardMPU MCA version would be easier to realize. Why do you prefer a Music Quest version of this? It seems more difficult because you can't easily make …

Keropi, would you at all be interested in doing a Microchannel version of this card? I ask because a few of us had been been discussing in other threads the idea of cloning existing Microchannel sound cards due to how rare they are. Turns out the schematics and technical info for the Roland MPU-IMC …

So a couple things to update on. First the technical manual for the Roland MPU-IMC was posted over on the Vintage Computer forums by the user eeguru. These actually have the full PCB scans and schematics: https://www.retrotronics.org/vcf/Roland_MPU-IMC_Service.pdf So with that you could probably …

So over at Vintage Computer Forums the service docs for the MPU-IMC were posted and they have the schematics for the board, the breakout box, and pictures of the board: https://www.retrotronics.org/vcf/Roland_MPU-IMC_Service.pdf For those who don't know this is the IBM Microchannel version of the …

So looking at the Roland card, as that's the only one I can really find a good picture of the front and back of it, this appears to be the pins used: A1 - CD Setup A3 - GND A4 - A11 A5 - A10 A6 - A09 A7 - +5Vdc A8 - A08 A9 - A07 A10 - A06 A11 - +5Vdc A12 - A05 A13 - A04 A14 - A03 A15 - +5Vdc A16 - …

Datasheets love, Datasheets don't judge - use them: http://pdf.datasheet.live/f3687abb/intel.com/82C611.pdf Would probably be best to stick to the one I posted earlier. It actually has the full thing as opposed to the one that's only 2 pages floating around everywhere. From the thread on vcfed, it …

So I actually just made a topic about this on VCFed: http://www.vcfed.org/forum/showthread.php?61834-Possibility-of-making-clone-MCA-sound-cards I'd say probably the two best candidates for making a clone would be the AdLib card and the Sound Blaster CT5320. Both these cards seem to use off the …