Re: A83: Assembly commands
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Re: A83: Assembly commands
HOPE THIS HELPS:
-Phelan 'Amen' Wolf
ldir,djnz,sbc,rra,drl, and rr I have no idea.
and (binary):
01000101 and
10011101
OUTPUT: 00100111
EXPLANATION: If bit = bit output 1, if bit (not)= bit output 0
xor (binary):
01000101 xor
10011101
OUTPUT: 11011000
EXPLANATION If bit or bit on, but not both on output 1, else 0
or (binary):
01000101 or
10011101
OUTPUT: 11011101
EXPLANATION: If bit or bit on or both on, output 1, else 0
push:
SYNTAX:
push 16bitregister
OUTPUT: none
EXPLANATION: Puts a 16bit register on the stack.
NOTE: You may only use 16bit registers, nothing else.
pop:
SYNTAX:
pop 16bitregister
OUTPUT: 16bitregister set at XX
EXPLANATION: Takes the last number off the stack and stores it into a
16bit register.
ei:
SYNTAX:
EI
OUTPUT: interupts enabled
EXPLANATION: [re]Enables interupts.
jp:
SYNTAX:
jp label
jp z,label
jp nz,label
jp c,label
jp nc,label
jp o,label
jp no,label
OUTPUT:
jp label:
jumps to specified label
jp z,label:
jumps to specified label if zero flag set
jp nz,label:
jumps to specified label if zero flag isn't set
jp c,label:
jumps to specified label if the carry flag is set
jp nc,label:
jumps to specified label if the carry flag isn't set
jp o,label:
jumps to specified label if the overflow flag is set
jp no,label:
jumps to specified label if the overflow flag in't set
OUTPUT: jumps to label or goes to next command
EXPLANATION: All but jp label are jumps if the previous command set a
certain flag, if the previous command subtracts 5 from 5, then the zero
flag will be set, if an 8bit + 8bit > 8bit then the carry flag is set. If
the previous operation results in a number too large then the overflow flag
is set.
jr:
SYNTAX:
jr label
OUTPUT: jumps to a close label, actual range I do not know.
EXPLANATION: Jumps to a close label.
References: