mirror of
https://github.com/irmen/prog8.git
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093be9f2dd
this means that all of the syslib.p8 library files no longer contain all those stack related asmsubs
255 lines
6.2 KiB
Lua
255 lines
6.2 KiB
Lua
%option no_symbol_prefixing, ignore_unused
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; Tiny syslib for minimalistic programs that can run on a X16
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%import shared_sys_functions
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sys {
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extsub $FFD2 = CHROUT(ubyte character @ A) ; output a character
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; these push/pop routines are always required by the compiler:
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asmsub reset_system() {
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; Soft-reset the system back to initial power-on Basic prompt.
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; We do this via the SMC so that a true reset is performed that also resets the Vera fully.
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; (note: this is an asmsub on purpose! don't change into a normal sub)
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%asm {{
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sei
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ldx #$42
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ldy #2
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lda #0
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jmp $fec9 ; i2c_write_byte
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}}
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}
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asmsub exit(ubyte returnvalue @A) {
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; -- immediately exit the program with a return code in the A register
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%asm {{
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sta p8_sys_startup.cleanup_at_exit._exitcode
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ldx prog8_lib.orig_stackpointer
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txs
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jmp p8_sys_startup.cleanup_at_exit
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}}
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}
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asmsub exit2(ubyte resulta @A, ubyte resultx @X, ubyte resulty @Y) {
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; -- immediately exit the program with result values in the A, X and Y registers.
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%asm {{
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sta p8_sys_startup.cleanup_at_exit._exitcode
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stx p8_sys_startup.cleanup_at_exit._exitcodeX
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sty p8_sys_startup.cleanup_at_exit._exitcodeY
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ldx prog8_lib.orig_stackpointer
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txs
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jmp p8_sys_startup.cleanup_at_exit
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}}
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}
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asmsub exit3(ubyte resulta @A, ubyte resultx @X, ubyte resulty @Y, bool carry @Pc) {
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; -- immediately exit the program with result values in the A, X and Y registers, and the Carry flag in the status register.
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%asm {{
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sta p8_sys_startup.cleanup_at_exit._exitcode
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lda #0
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rol a
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sta p8_sys_startup.cleanup_at_exit._exitcarry
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stx p8_sys_startup.cleanup_at_exit._exitcodeX
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sty p8_sys_startup.cleanup_at_exit._exitcodeY
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ldx prog8_lib.orig_stackpointer
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txs
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jmp p8_sys_startup.cleanup_at_exit
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}}
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}
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}
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p8_sys_startup {
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%option force_output
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asmsub init_system() {
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%asm {{
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rts
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}}
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}
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asmsub init_system_phase2() {
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%asm {{
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rts
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}}
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}
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asmsub cleanup_at_exit() {
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; executed when the main subroutine does rts
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%asm {{
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lda _exitcarry
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lsr a
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lda _exitcode
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ldx _exitcodeX
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ldy _exitcodeY
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rts
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.section BSS
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_exitcarry .byte ?
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_exitcode .byte ?
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_exitcodeX .byte ?
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_exitcodeY .byte ?
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.send BSS
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; !notreached!
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}}
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}
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}
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cx16 {
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; the sixteen virtual 16-bit registers that the CX16 has defined in the zeropage
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&uword r0 = $0002
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&uword r1 = $0004
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&uword r2 = $0006
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&uword r3 = $0008
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&uword r4 = $000a
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&uword r5 = $000c
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&uword r6 = $000e
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&uword r7 = $0010
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&uword r8 = $0012
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&uword r9 = $0014
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&uword r10 = $0016
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&uword r11 = $0018
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&uword r12 = $001a
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&uword r13 = $001c
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&uword r14 = $001e
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&uword r15 = $0020
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; signed word versions
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&word r0s = $0002
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&word r1s = $0004
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&word r2s = $0006
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&word r3s = $0008
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&word r4s = $000a
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&word r5s = $000c
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&word r6s = $000e
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&word r7s = $0010
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&word r8s = $0012
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&word r9s = $0014
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&word r10s = $0016
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&word r11s = $0018
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&word r12s = $001a
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&word r13s = $001c
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&word r14s = $001e
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&word r15s = $0020
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; signed long versions
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&long r0r1sl = $0002
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&long r2r3sl = $0006
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&long r4r5sl = $000a
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&long r6r7sl = $000e
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&long r8r9sl = $0012
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&long r10r11sl = $0016
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&long r12r13sl = $001a
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&long r14r15sl = $001e
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; ubyte versions (low and high bytes)
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&ubyte r0L = $0002
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&ubyte r1L = $0004
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&ubyte r2L = $0006
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&ubyte r3L = $0008
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&ubyte r4L = $000a
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&ubyte r5L = $000c
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&ubyte r6L = $000e
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&ubyte r7L = $0010
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&ubyte r8L = $0012
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&ubyte r9L = $0014
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&ubyte r10L = $0016
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&ubyte r11L = $0018
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&ubyte r12L = $001a
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&ubyte r13L = $001c
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&ubyte r14L = $001e
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&ubyte r15L = $0020
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&ubyte r0H = $0003
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&ubyte r1H = $0005
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&ubyte r2H = $0007
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&ubyte r3H = $0009
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&ubyte r4H = $000b
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&ubyte r5H = $000d
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&ubyte r6H = $000f
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&ubyte r7H = $0011
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&ubyte r8H = $0013
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&ubyte r9H = $0015
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&ubyte r10H = $0017
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&ubyte r11H = $0019
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&ubyte r12H = $001b
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&ubyte r13H = $001d
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&ubyte r14H = $001f
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&ubyte r15H = $0021
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; signed byte versions (low and high bytes)
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&byte r0sL = $0002
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&byte r1sL = $0004
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&byte r2sL = $0006
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&byte r3sL = $0008
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&byte r4sL = $000a
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&byte r5sL = $000c
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&byte r6sL = $000e
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&byte r7sL = $0010
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&byte r8sL = $0012
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&byte r9sL = $0014
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&byte r10sL = $0016
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&byte r11sL = $0018
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&byte r12sL = $001a
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&byte r13sL = $001c
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&byte r14sL = $001e
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&byte r15sL = $0020
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&byte r0sH = $0003
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&byte r1sH = $0005
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&byte r2sH = $0007
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&byte r3sH = $0009
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&byte r4sH = $000b
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&byte r5sH = $000d
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&byte r6sH = $000f
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&byte r7sH = $0011
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&byte r8sH = $0013
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&byte r9sH = $0015
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&byte r10sH = $0017
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&byte r11sH = $0019
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&byte r12sH = $001b
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&byte r13sH = $001d
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&byte r14sH = $001f
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&byte r15sH = $0021
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; boolean versions
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&bool r0bL = $0002
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&bool r1bL = $0004
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&bool r2bL = $0006
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&bool r3bL = $0008
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&bool r4bL = $000a
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&bool r5bL = $000c
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&bool r6bL = $000e
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&bool r7bL = $0010
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&bool r8bL = $0012
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&bool r9bL = $0014
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&bool r10bL = $0016
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&bool r11bL = $0018
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&bool r12bL = $001a
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&bool r13bL = $001c
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&bool r14bL = $001e
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&bool r15bL = $0020
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&bool r0bH = $0003
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&bool r1bH = $0005
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&bool r2bH = $0007
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&bool r3bH = $0009
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&bool r4bH = $000b
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&bool r5bH = $000d
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&bool r6bH = $000f
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&bool r7bH = $0011
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&bool r8bH = $0013
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&bool r9bH = $0015
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&bool r10bH = $0017
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&bool r11bH = $0019
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&bool r12bH = $001b
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&bool r13bH = $001d
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&bool r14bH = $001f
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&bool r15bH = $0021
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}
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