3 May
2009
3 May
'09
10:08 a.m.
Michael B. Brutman wrote:
The PCjr Speech Adapter sidecar is rumored to be identical to the PS/2
version, at least as far as the BIOS support on the adapter goes.
Ok - it looks like nobody has ready access to a tech ref for the PCjr
version or the PS/2 version of the speech adapter. I am sure its buried
in a nice binder with a slipcover somewhere but I don't have the PS/2
set - I only have the PC family set of docs and they didn't make one of
these for the PC or XT.
The part of the adapter I'm interested in is driven by a MC3418. This
chip does CVSD encoding and decoding of waveforms. I understand the
principle behind CVSD encoding and decoding, but not enough to start
writing code. I want to write some code takes CVSD encoded data and
displays the waveform on a screen, for a sound editor. Does anybody
have any experience reading MC3418 encoded data?
Thanks,
Mike