| FETCH MACRO MA,MB
FETCH FROM MEMORY
Four PDP-8 words are blocked into one CDC word. The macro first separates the PDP-8 address (MA) into two parts, a 10-bit block number (in X1) and a 2-bit word within block (in B6) scaled to be a multiple of 16.
The proper block is fetched from MEMORY. Then the desired word is extracted and returned in the desired X register (MB)..
| FETCH PS