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100 lines
2.1 KiB
ArmAsm
100 lines
2.1 KiB
ArmAsm
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; Stefan Haubenthal, 2005-12-24
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; Based on on code by Christian Groessler
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;
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; unsigned char __fastcall__ _syschdir (const char* name);
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; for SpartaDOS, RealDOS, and MyDOS
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;
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.include "atari.inc"
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.import findfreeiocb
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.import __dos_type
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.import initcwd
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.importzp tmp4
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.ifdef UCASE_FILENAME
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.importzp tmp3
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.import addysp
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.import ucase_fn
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.ifdef DEFAULT_DEVICE
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.importzp tmp2
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.endif
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.endif
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.export __syschdir
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.proc __syschdir
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pha ; save input parameter
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txa
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pha
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jsr findfreeiocb
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beq iocbok ; we found one
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pla
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pla ; fix up stack
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lda #TMOF ; too many open files
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rts
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iocbok: stx tmp4 ; remember IOCB index
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pla
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tax
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pla ; get argument again
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.ifdef UCASE_FILENAME
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.ifdef DEFAULT_DEVICE
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ldy #$80
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sty tmp2 ; set flag for ucase_fn
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.endif
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jsr ucase_fn
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bcc ucok1
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lda #183 ; see oserror.s
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rts
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ucok1:
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.endif ; defined UCASE_FILENAME
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ldy tmp4 ; IOCB index
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sta ICBAL,y ; store pointer to filename
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txa
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sta ICBAH,y
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tya
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tax
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lda __dos_type
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cmp #SPARTADOS
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beq :+
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cmp #REALDOS
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beq :+
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cmp #BWDOS
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beq :+
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lda #CHDIR_MYDOS
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.byte $2C ; BIT <abs>
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: lda #CHDIR_SPDOS
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sta ICCOM,x
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lda #0
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sta ICAX1,x
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sta ICAX2,x
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sta ICBLL,x
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sta ICBLH,x
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jsr CIOV
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.ifdef UCASE_FILENAME
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tya
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pha
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ldy tmp3 ; get size
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jsr addysp ; free used space on the stack
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pla
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tay
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.endif ; defined UCASE_FILENAME
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bmi cioerr
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jsr initcwd
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lda #0
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rts
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cioerr: tya
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rts
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.endproc ; __syschdir
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