[LMH]Raven Microcode Questions
Mon Nov 10 18:01:02 2003
Over the past couple weeks I've been working on figuring out how the
Raven (Explorer I) processor interprets it's microcode. I've got some of
it figured out, but I have a few questions.
I'm figuring that the condition field of the jump instruction
selectively disables the main jump action, in favor of the abbrev-jump
field action (if specified).
My first question is how do the condition and abbrev-jump fields
interact on alu and byte instructions? How does the condition field
operate on these instructions without the abbrev-jump field?
My second question is what is the encoding for where to store the data
when using the jump instruction to read I-Memory?
I'm sure there are more questions waiting in the wings. Oh well.
If someone could shed some light on these subjects it would be much