From IRC
<Ex-Cyber> maybe a starting point for comparison:
http://hitmen.c02.at/files/docs/dc/aica_v08.txt
<Ex-Cyber> but I never really studied the SCSP
<Ex-Cyber> oh yeah, the SCSP manual has pretty much nothing on the DSP
<Ex-Cyber> just a block diagram and a really vague register map :/
<Ex-Cyber> hmm
<Ex-Cyber> not sure this is direct-linkable but:
http://koti.kapsi.fi/~antime/sega/files/ST-228-R1-030596.pdf
<Ex-Cyber> and it doesn't have real instruction encodings
<Ex-Cyber> but seems to give some idea of how it works
<Ex-Cyber> looks like you can basically do difference equations and memory load/store ops, though I could be misinterpreting
* Ex-Cyber takes another look at that block diagram
<Ex-Cyber> heh... the microcode memory is on there but just has an arrow vaguely pointing into the rest of the diagram
<Ex-Cyber> haha
<Ex-Cyber> that happens sometimes in block diagrams when the person drawing it wants to "cheat" and not actually connect two things with a line (e.g. if they're in opposite corners or otherwise would need a lot of snaking around)
<Ex-Cyber> but this one doesn't go anywhere
<Ex-Cyber> it's just like "MPRO(128Wx54b) ---->"
<Ex-Cyber> and I'm guessing that "54" is supposed to be "64"