cclist at sydex.com
Fri Dec 12 16:19:26 CST 2008
On 12 Dec 2008 at 14:31, bfranchuk at jetnet.ab.ca wrote:
> That is 3 opcode bits and a indirect bit. Going to 4 opcode bits
> gives you 32K of memory and would make a nice small machine
> that dates around the early 60's.
> The problem is that I want to have local function variables, and that
I suppose that a 16-bit (or 20-bit 3-(16/32 register) address design
would be too complex. But it would give you the flexibility you need
without an explicitly-implemented hardware stack. Make one of the
registers PC and branches get interesting.
Who needs registers or indirect addressing anyway? IA was an
*option* on the CADET. Instruction modification was a way of life.
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