Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2023-03-30, 10:56
If anyone is interested, dosbox-staging have added IMFC support in their latest dev builds 😀 https://dosbox-staging.github.io/downloads/de … lopment-builds/
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2023-03-30, 08:51
Hi guys, It's been a while since I posted any updates. I have completed the first (and major) part of the full IMF emulation in dosbox :). It currently allows you to play (probably) all the sierra games purely in dosbox. As you might have already read between the lines, it's not compete yet. There …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2020-01-08, 12:08
Hi guys, It's been a while since I posted any updates. I have completed the first (and major) part of the full IMF emulation in dosbox :). It currently allows you to play (probably) all the sierra games purely in dosbox. As you might have already read between the lines, it's not compete yet. There …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-08-09, 12:50
Did you know: The (undocumented) system command message 1F6 allows you to write to the card memory (RAM - not the standard buffers). That also includes code! It's even intended to have code in 0xc000 that can be executed - Nice! But not emulatable 🙁.
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-08-04, 04:10
Scali, I've gotten further as well in terms of reverse-engineering. I'm not completely done, but I've got a big portion as well. In the google drive https://drive.google.com/drive/folders/0B-ppgg8G9MVWWEMta3RxeDdTX2M you'll find the "01-CODE (original clean enhanced).asm". It's a auto-gererated file …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-07-09, 19:20
I made a quick decompile of the fb-01 code (it's in the google drive / file called "Yamaha_FB01 (original clean enhanced).asm"). Hadn't had time to find any names. But what you can certainly see is what is code and what is data. My post-processor sets the segment to ".code" if it was able to reach …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-07-06, 10:52
It's really amazing how many bugs I already found! How could it have been that complicated?! There's a sysex command to dump a source memory (Node Dump Request Message with Source 1 and 6). Source 1 and 6 represent the configuration buffer 1 and 2. It's nice to see that DumpSource1 and DumpSource6 …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-07-05, 05:40
In the emulation, should we also emulate all the stack overflows that are in the IMF code? 😉 Already found one "hidden" sysex command 😀
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-07-04, 10:11
Just to keep you up-to-date: I'm reverse engineering the IMF ROM code. It's really simple; no assembly optimizations 😀. I'm not finished yet, but getting there.
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-06-30, 14:55
Guess who 😀. github would be a good starting point
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-06-30, 14:30
Nice! If you can get silpheed or space quest 3 to sound like the originals I would be severly impressed 😉 http://www.crossfire-designs.de/index.php?lan … undcards&page=6
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-06-30, 13:20
I'm confused... why do you need MUNT? I've been looking a bit how the GUS implementation is done in dosbox. It looks like it only needs a "MixerChan.Install(GUS_CallBack,GUS_RATE,"GUS")" and the callback calculates the next MIXER_BUFFER_SIZE samples and sends them back to the channel mixer via "gus_ …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-06-29, 10:47
> And I now have it working, yay! You mean, you've got dosbox to actually output sound when playing through the IMF?! Wow! That's great news!!
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-06-29, 05:28
Scali, I just had a look at the mame code for the ym2151... All the changes starting with the objectifying commit can be discarded. You could use the ym2151 from mame commit id ec5b9deadee9a2f95e0691f7246a8f4663ba3ba9. But you could also use the real C version from commit …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-05-12, 07:15
It's has been a long time since I've played with my IMF, but I *thought* that sierra games had their own custom instrument configurations. That's why the SQ3 sounded great, because it used non-default instruments. If you had a "raw" IMF emulator without the default instruments, then I *think* sierra …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-04-20, 13:06
If it has some handwriting on page "8-11" then it came from me 😉. I always loved to tamper around the registers and create new instruments with the IMF.
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2017-04-20, 12:25
Fixed were two instances of sysex data read with DI+offset in a loop and neglecting to initialize DI to zero, which caused a large amount of junk to be written as MIDI data before DI finally wrapped around. I checked that other instances of DI+offset, SI+offset, and BX+offset don't make the same …
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2013-12-10, 14:45
@Cloudschatze or @Davis: I've long been trying to get a dosbox with IMF emulation working. Since Davis was able to record the youtube videos, there must be a version available. The question is just: where?
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2008-12-10, 16:58
Sorry.. it's my home server and I guess a couple of people are downloading it simultaniously 🙁
Re: IBM Music Feature Card/Yamaha FB-01
Posted on 2008-12-10, 12:20
Just in case someone is interested: I have scanned the original "IBM PC Music Feature Technical Reference" manual that I got along with my IMF card back in the 80s. You can find it here: http://www.gargamel.ch/IMFTechnicalReference.pdf Watch out: it's 50MB!
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