2 Apr
2006
2 Apr
'06
9:30 p.m.
On 4/2/2006 at 7:12 PM Roy J. Tellason wrote:
And why it was necessary to stuff parameters into
registers, when it's
easy enough to put 'em on the stack, among other things.
Well, memory fetches are slower than register references for one. It
requires stack space, for another. And the 8080 code to access the
arguments, while not awful, is somewhat clumsy:
lxi h, 2
dad sp
mov c,m
inx h
mov b,m
....or something like that to grab a word off the stack into BC.
Cheers,
Chuck