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added cx16.rom_version() routine

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Irmen de Jong 2024-06-07 23:15:26 +02:00
parent c9a4235669
commit b3dba67405
1 changed files with 17 additions and 0 deletions
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17
compiler/res/prog8lib/cx16/syslib.p8
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@ -1322,6 +1322,23 @@ _continue iny
void cx16.i2c_write_byte($42, $05, cx16.r0L) void cx16.i2c_write_byte($42, $05, cx16.r0L)
} }
asmsub rom_version() clobbers(Y) -> ubyte @A, bool @Pc {
; Returns the KERNEL ROM version. Carry set if pre-release, clear if offical release.
%asm{{
; the ROM BANK is unknown on entry
ldy $01
stz $01 ; KERNEL ROM
clc ; prepare for released ROM
lda $FF80
bpl _final ; pre-release versions are negative
eor #$FF ; twos complement
ina
sec
_final:
sty $01
rts
}}
}
} }
sys { sys {