[Coco] Speech and Sound Cartridge under NitrOS9
pruittk at roadrunner.com
Wed Dec 30 11:34:47 EST 2015
Is it at all possible to operate an UNMODIFIED speech and sound cartridge
under NitrOS9 Level 2?
Here's what I am doing... I am halting the interrupts and dropping the CoCo
down to 0.89Mhz. This allows the Speech and Sound cartridge to speak under
I'm happy to post the code I am using, but it's just the BASIC listing
starting on page 5 of the device's manual translated in to assembly.
This works fine under stock Level 2 OS-9 but leaves the system unstable. It
works on NitrOS9 fine as far as speaking goes, but it never gets to the
point of turning the interrupts back on and returning the CoCo to 1.79Mhz. A
reset is required to recover from the hang-up as the interrupts are off
By the way, I use this method of turning off the interrupts and dropping the
CoCo down to 0.89Mhz quite successfully with the Plug 'n Power controller.
I've been running it for a couple of years now under NitrOS9 and is hasn't
failed me once or caused any issues with the OS.
I installed the speech and sound cartridge drivers to play around with them
(I assume they are for the modified cartridge) but when they are installed
NitrOS9 won't boot for me. If I just load the drivers I get an error 207
when I try and send something to them. This takes place no matter if the
Speech and Sound cartridge is plugged in or not.
I'm just screwing around with the sound and speech cartridge here and am
just curious if what I an trying is even possible to pull off. If anybody
would care to chime in on the speech and sound cartridge I would really
appreciate the input.
More information about the Coco