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Re: SBVGM (DOS) VGM Player

Yes, there are two versions of the SN76489, the early one, and the SN76489A. There is also the SN76496, which has an extra audio input pin for mixing with other audio sources, but is otherwise equal to the SN76489A. So if you support both types of noise generation, you should be okay with all the …

Re: SBVGM (DOS) VGM Player

will there be a way to force game blaster for sa1099? It looks like you found a bug in the auto detection. :depressed: I see that there could be a variation where a Sound Blaster (or compatible) device is detected before it checks for a Game Blaster (SB is of higher priority). I'll see what I can …

Re: SBVGM (DOS) VGM Player

Be very careful when assuming the Tandy 3 Voice is the same as the Master System and Genesis\MegaDrive. Variations of the SN76489 have differing noise generation if I'm not mistaken, which can prove problematic. The noise generation pattern is different so a VGM that doesn't have the same pattern …

Re: SBVGM (DOS) VGM Player

hello, I have a few sugestions for new features: 1. ay8910 support (there's a pretty good dos ay emulator by marsel de cogel that some old emulators use) 2. for sn77489: add tandy 3 voice support, it's the same sound chip. Thank you for the feedback. I actually am planning to support the SN76489 on …

SBVGM (DOS) VGM Player

In case anyone is interested, I recently released a VGM player for DOS that can be downloaded here . Supported Sound Hardware IBM PCJr Tandy 1000 Tandy Sound (SN76489) Adapter IBM PS/1 Audio Adlib Music Synthesizer Card Game Blaster Sound Blaster 1.x/2.x Sound BLaster Pro 1 Sound Blaster Pro 2 Sound …

Re: CMS/Gameblaster Rewrite and accuracy

I really wish I had one to test on! I have a Sound Blaster 1.x with CMS chips installed, so if you want me to record your tests, I will. Just make sure your test program does not require 386 instructions, because the computer in which the SB card is installed is a Tandy 1000 TX, whose CPU is an …

Re: CMS/Gameblaster Rewrite and accuracy

I do not know of any game that uses the envelope generators. The omission of the envelope generators from the official Creative documentation is inexplicable when they are documented in the data sheet. But given the contempt for which most PC music programmers must have held the card, I doubt they …

Re: CMS/Gameblaster Rewrite and accuracy

Historically, there are 85 known games supporting the Game Blaster, but World of SAM lists 80 games published for the SAM Coupé. I guess that makes the Game Blaster the most popular device using the SAA-1099 PSGs :) The base frequency for the SAA-1099s must be that of the Game Blaster (7.159MHz), …

Re: CMS/Gameblaster Rewrite and accuracy

I hope it's that simple ... but I have the feeling that it won't be since the actual values sent to the frequency registers from the VGM are based off of the input clock. If I ever manage to get a chance, I might try that or something to see what works. Thank you for the suggestion! :happy: It …

Re: CMS/Gameblaster Rewrite and accuracy

but unfortunately the hardware that they are used on is clocked different from the Gameblaster Frequency can be adjustable for SAA1099 VGMs like every other VGM. Which means you can adjust an SAA1099 VGM to have the exact frequency of a Game Blaster. I hope it's that simple ... but I have the …

Re: CMS/Gameblaster Rewrite and accuracy

Too bad the .VGM format has no CMS chip support, so my feature request would be to have DosBox output .DRO-like format for recording CMS music. The VGM format recently(?) added support for the SAA1099 ... but unfortunately the hardware that they are used on is clocked different from the Gameblaster …

Re: CMS/Gameblaster Rewrite and accuracy

The SAA1099 code is already accurate, it's the clock that needs to be corrected. On the hand, the MCUs on the card need to be dumped as well and need to be emulated in the card interface, because they do weird detection behaviors with the Tandy 1000 and a generic 486.... Aside from the incorrect …

Re: Patch for SAA1099/Gameblaster emulation...

in DOSBox Patches
Thanks for updating the patch! I'm not sure if there are any games that used the envelope generators; it would be very nice if there was one out there. I also updated my initial post by changing "clock_multiplier" to "sample_frequency" per the information I was recently reading about here: OPL chip …

Re: Patch for SAA1099/Gameblaster emulation...

in DOSBox Patches
Thank you for moving the thread over to the patches forum; it is unfortunate that there were not too many games that used the Gameblaster option. :) Thank you also for the information about the oscillator's frequency; everything makes sense now. I had been doing some tests with an actual SAA1099 (@ …

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