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Behave more like BASIC.SYSTEM and allow for argv[0].

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Oliver Schmidt 2015-04-19 21:59:05 +02:00
parent 24e902059c
commit ae4f9336b3
1 changed files with 14 additions and 11 deletions
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25
libsrc/apple2/exec.s
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@ -28,6 +28,20 @@ _exec:
jsr pushname
bne oserr
; ProDOS TechRefMan, chapter 5.1.5.1:
; "The complete or partial pathname of the system program
; is stored at $280, starting with a length byte."
; In fact BASIC.SYSTEM does the same for BLOAD and BRUN of
; binary programs so we should do the same too in any case
; especially as _we_ rely on it in mainargs.s for argv[0].
ldy #$00
lda (sp),y
tay
: lda (sp),y
sta $0280,y
dey
bpl :-
; Set pushed name
lda sp
ldx sp+1
@ -53,17 +67,6 @@ _exec:
cmp #$FF ; SYS file?
bne binary ; No, check for BIN file
; ProDOS TechRefMan, chapter 5.1.5.1:
; "The complete or partial pathname of the system program
; is stored at $280, starting with a length byte."
ldy #$00
lda (sp),y
tay
: lda (sp),y
sta $0280,y
dey
bpl :-
; SYS programs replace BASIC.SYSTEM so set in the ProDOS system bit map
; protection for pages $80 - $BF just in case BASIC.SYSTEM is there now
ldx #$0F ; Start with protection for pages $B8 - $BF