mirror of https://github.com/a2-4am/4cade.git
80 lines
1.8 KiB
Plaintext
80 lines
1.8 KiB
Plaintext
;license:MIT
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;(c) 2018-9 by 4am
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;
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; ProDOS - functions for constructing and passing around ProDOS pathnames
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;
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; Public functions
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; - SetPath
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; - AddToPath
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;
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kHGRTitleDirectory
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!byte 10
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!raw "TITLE.HGR/"
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kDHGRTitleDirectory
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!byte 11
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!raw "TITLE.DHGR/"
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kHGRActionDirectory
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!byte 11
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!raw "ACTION.HGR/"
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kDHGRActionDirectory
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!byte 12
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!raw "ACTION.DHGR/"
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kSHRArtworkDirectory
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!byte 12
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!raw "ARTWORK.SHR/"
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kAttractModeSlideshowDirectory
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!byte 3
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!raw "SS/"
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kDemoDirectory
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!byte 5
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!raw "DEMO/"
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kGameDirectory
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!byte 2
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!raw "X/"
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kFXDirectory
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!byte 3
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!raw "FX/"
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;------------------------------------------------------------------------------
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; SetPath/AddToPath
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; append a length-prefixed string to gPathname
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; SetPath will reset the path first
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;
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; in: A contains low byte of address of length-prefixed string to append
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; Y contains high byte of address of length-prefixed string to append
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; out: all registers and flags clobbered
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; $00/$01 clobbered
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; gPathname updated with concatenated length-prefixed string
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;------------------------------------------------------------------------------
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SetPath
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ldx #0
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stx gPathname
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; execution falls through here
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AddToPath
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+STAY $00
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ldx gPathname ; current pathname length
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ldy #0
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lda ($00),y ; length of this segment
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tay
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iny
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sty @len
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ldy #$01
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- lda ($00),y
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sta gPathname+1,x
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inx
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iny
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@len=*+1
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cpy #$FD ; SMC
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bcc -
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stx gPathname
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rts
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