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https://github.com/a2stuff/prodos-path.git
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wip
This commit is contained in:
Joshua Bell
parent
6c0f888b07
commit
f9a63cea8b
79
path.s
79
path.s
@ -16,7 +16,7 @@
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;;;
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;;; Installed command memory structure:
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;;; * 2 pages - code, path buffer
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;;; * 2 pages - I/O buffer
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;;; * 4 pages - I/O buffer
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;;; TODO:
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;;; * Dynamically allocate I/O buffer
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@ -58,9 +58,9 @@ CASE_MASK = $DF
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lda EXTRNCMD+2
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sta next_command+1
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;; Request a 4-page buffer - two pages for handler,
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;; two pages for I/O buffer.
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lda #4
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;; Request a 6-page buffer - 2 pages for handler,
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;; 4 pages for I/O buffer.
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lda #6
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jsr GETBUFR
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bcc :+
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lda #$C ; NO BUFFERS AVAILABLE
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@ -68,9 +68,8 @@ CASE_MASK = $DF
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: sta new_page ; A = MSB of new page
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;; Compute move delta in pages
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lda #>handler
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sec
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sbc new_page
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sbc #>handler
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sta page_delta
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;; Relocatable routine is aligned to page boundary so only MSB changes
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@ -83,10 +82,10 @@ CASE_MASK = $DF
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lda relocation_table+2,y
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sta ptr+1
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lda (ptr),y
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lda (ptr)
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clc
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adc page_delta
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sta (ptr),y
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sta (ptr)
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inx
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cpx relocation_table
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bne :-
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@ -162,7 +161,7 @@ nxtchr: lda INBUF,x
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;; Set accepted parameter flags (Name, Slot/Drive)
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lda #PBitsFlags::FN1 ; Filename
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lda #PBitsFlags::FNOPT | PBitsFlags::FN1 ; Filename (optional)
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sta PBITS
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lda #PBitsFlags::SD ; Slot & Drive handling
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@ -175,6 +174,7 @@ nxtchr: lda INBUF,x
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check_if_token:
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;; Is a PATH set?
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page_num18 := *+2 ; address needing updating
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lda path_buffer
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beq not_ours
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@ -248,7 +248,7 @@ access: .byte 0
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file_type: .byte 0
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aux_type: .word 0
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storage_type: .byte 0
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blocks_used: .byte 0
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blocks_used: .word 0
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mod_date: .word 0
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mod_time: .word 0
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create_date: .word 0
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@ -281,47 +281,56 @@ ref_num: .byte 0
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maybe_invoke:
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;; Compose path
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ldx #0
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: lda path_buffer+1,x ; TODO: absolute refs
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sta command_path_buffer+1,x ; TODO: absolute refs
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page_num12 := *+2 ; address needing updating
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: lda path_buffer+1,x
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page_num13 := *+2 ; address needing updating
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sta command_path_buffer+1,x
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inx
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page_num14 := *+2 ; address needing updating
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cpx path_buffer
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bne :-
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lda #'/'
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page_num15 := *+2 ; address needing updating
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sta command_path_buffer+1,x
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inx
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ldy #0
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: lda INBUF,y
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cmp #'.'|$80
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beq @ok
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and #$7F
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cmp #'.'
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beq ok
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cmp #'0'
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bcc @notok
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bcc notok
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cmp #'9'+1
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bcc @ok
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bcc ok
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cmp #'A'
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bcc @notok
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bcc notok
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cmp #'Z'+1
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bcc @ok
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bcc ok
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cmp #'a'
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bcc @notok
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bcc notok
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cmp #'z'+1
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bcs @notok
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bcs notok
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@ok: sta command_path_buffer+1,x
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page_num16 := *+2 ; address needing updating
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ok: sta command_path_buffer+1,x
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inx
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iny
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bne :-
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@notok: stx command_path_buffer
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page_num17 := *+2 ; address needing updating
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notok: stx command_path_buffer
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jsr MLI
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.byte GET_FILE_INFO
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page_num19 := *+1
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.addr get_file_info_params
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beq :+
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sec ; no such file - signal it's not us
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rts
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page_num23 := *+2
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: lda get_file_info_params::file_type
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cmp #$F0 ; CMD
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beq :+
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@ -343,17 +352,22 @@ maybe_invoke:
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;; Now try to open/read/close and invoke it
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jsr MLI
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.byte OPEN
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page_num20 := *+1
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.addr open_params
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beq :+
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lda #8 ; I/O ERROR - TODO: is this used???
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sec
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rts
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page_num24 := *+2
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: lda open_params::ref_num
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page_num25 := *+2
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sta read_params::ref_num
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page_num26 := *+2
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sta close_params::ref_num
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jsr MLI
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.byte READ
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page_num21 := *+1
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.addr read_params
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beq :+
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lda #8 ; I/O ERROR - TODO: is this used???
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@ -362,6 +376,7 @@ maybe_invoke:
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: jsr MLI
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.byte CLOSE
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page_num22 := *+1
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.addr close_params
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;; Invoke command
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@ -404,7 +419,7 @@ done: clc
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set_path:
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lda VPATH1
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sta ptr
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ldx VPATH1+1
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lda VPATH1+1
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sta ptr+1
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ldy #0
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@ -452,7 +467,7 @@ page_delta:
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.byte 0
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relocation_table:
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.byte 5
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.byte (table_end - *) / 2
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.addr handler::page_num1
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.addr handler::page_num2
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.addr handler::page_num3
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@ -464,3 +479,19 @@ relocation_table:
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.addr handler::page_num9
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.addr handler::page_num10
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.addr handler::page_num11
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.addr handler::page_num12
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.addr handler::page_num13
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.addr handler::page_num14
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.addr handler::page_num15
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.addr handler::page_num16
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.addr handler::page_num17
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.addr handler::page_num18
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.addr handler::page_num19
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.addr handler::page_num20
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.addr handler::page_num21
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.addr handler::page_num22
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.addr handler::page_num23
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.addr handler::page_num24
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.addr handler::page_num25
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.addr handler::page_num26
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table_end := *
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