26 Feb
2008
26 Feb
'08
11:23 p.m.
On 26 Feb 2008 at 12:27, Jeff Erwin wrote:
sui 3ch ; subtract the ascii base
cpi 0ah ; check for 0-9
rc
sui 07h ; subtract further for A-F
ret
Has to be invoked by a CALL to work and has a conditional return, so
it's not a no-branch solution. Mine works for both upper- and lower-
case alpha and always yields a result from 0 to 15.
Any more candidates?
Cheers,
Chuck