mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2025-02-07 21:30:32 +00:00
9b12b6fd9b
- getting ready for major changes for 0.6.0. - be sure to download the 0.5.0 release to ensure proper functionality, as these rountines will not work together in the SRC or BIN folder during the transition - Beginning to significantly alter documentation
39 lines
856 B
NASM
39 lines
856 B
NASM
]MCAND EQU WPAR1
|
|
]MLIER EQU WPAR2
|
|
]HPROD EQU WPAR3
|
|
MULT16
|
|
LDA #0
|
|
STA ]HPROD
|
|
STA ]HPROD+1
|
|
LDX #17
|
|
|
|
CLC
|
|
|
|
:MLP
|
|
ROR ]HPROD+1
|
|
ROR ]HPROD
|
|
ROR ]MLIER+1
|
|
ROR ]MLIER
|
|
BCC :DX
|
|
CLC
|
|
LDA ]MCAND
|
|
ADC ]HPROD
|
|
STA ]HPROD
|
|
LDA ]MCAND+1
|
|
ADC ]HPROD+1
|
|
STA ]HPROD+1
|
|
:DX
|
|
DEX
|
|
BNE :MLP
|
|
LDA #4
|
|
STA RETLEN
|
|
LDA ]HPROD+1
|
|
STA RETURN+3
|
|
LDA ]HPROD
|
|
STA RETURN+2
|
|
LDX ]MLIER+1
|
|
STX RETURN+1
|
|
LDA ]MLIER
|
|
STA RETURN
|
|
RTS
|