First post, by Glendower
The PicoGUS I ordered arrived this week, and I haven't had a ton of time to play with it, but I feel like I have the (super)basics down, but I am unable to get any digital audio out of it (Tandy 3-voice is absurdly quiet, but I'm thinking that it might be a setting issue that I just haven't found yet). I've tried it in 2 systems so far a 486DX4 and a P200MMX.
What definitely works: MPU-401 both
GUS Music: Pentium only
FM: Both
Digital audio doesn't work in GUS or SB mode. I haven't tried the CD emulation, mouse, or anything but audio functions.
As far as I can tell, the ISA bus on the 486 is running c. 7.15mHz (based off of a clock crystal of 14.31mhz that I assume is for the ISA bus and halved. The main clock crystal is halved, so I'm really just assuming).
I have tried it on ports 220, 240 and 260 for both GUS and SB. I've set the p0rt with /sbport and /gusport.
I've also used IRQs that have worked with a few different SB cards (5 and 7).
On the 486, the system hardlocks when I try to start any game using anything but adlib-compatibility.
Is there a utility i can use that can help me determine ISA bus clock? I'd like to be able to rule that out and there's no way to see it in either system's BIOS.
I'm bummed-- I really just wanted an ISA card that could do digital audio, since I have FM and midi available on separate cards, so all of that capability is gravy... but now I just have a bowl of delicious gravy. 😀
