top | item 45490159

(no title)

clausecker | 4 months ago

Also, the VAX instruction encoding is a class of horror above that of x86.

discuss

order

p_l|4 months ago

few classes above.

Only ISA where I've seen a single instruction span two memory pages despite being page aligned

brucehoult|4 months ago

Two cache lines, sure, on earlier models, but not two VM pages!!

Maximum instruction length is 56 bytes. Early models had 8 byte cache lines, later ones 64 bytes. VM page 512 bytes.