Files
open-roms/c64/basic/cmd_sys.s
T
2019-09-28 11:59:15 +02:00

32 lines
398 B
ArmAsm

cmd_sys:
jsr basic_end_of_statement_check
bcc !+
// SYS requires an argument
jmp do_SYNTAX_error
!:
jsr basic_parse_line_number
// setup call
lda #$4C // JMP opcode
sta USRPOK
lda LINNUM+0
sta USRADD+0
lda LINNUM+1
sta USRADD+1
// Setup the register values
lda SPREG
pha
ldy SYREG
ldx SXREG
lda SAREG
plp
// Call the routine.
jsr USRPOK
jmp basic_execute_statement