cc65/libsrc/cbm610/kreadst.s

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;
; Ullrich von Bassewitz, 2003-12-19
;
; READST kernal call
;
.export READST
.import sys_bank, restore_bank
.import sysp0: zp, ktmp: zp
.include "cbm610.inc"
.proc READST
jsr sys_bank
sty ktmp ; Save Y register
ldy #ST
lda (sysp0),y ; Load ST from system bank
ldy ktmp
jmp restore_bank ; Will set condition codes on A
.endproc