65 lines
1.2 KiB
ArmAsm
65 lines
1.2 KiB
ArmAsm
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; CBM/CMD virtual filesystem - reading the file
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;
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fs_cbm_read_file_open:
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; Get the first sector of the directory XXX deduplicate code, create a separate open directory routine
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lda #40
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sta PAR_TRACK
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lda #$03
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sta PAR_SECTOR
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jsr lowlevel_xx_readsector ; XXX handle read errors
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; Set variables to point to the 1st directory entry in the 2nd sector of the buffer
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lda #$08
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sta F0_DIRENT
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; Make sure the 1st sector in buffer points to 2nd one
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lda #40
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sta SHARED_BUF_1+0
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lda #03
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sta SHARED_BUF_1+1
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; XXX deduplicate code above with fs_cbm_read_dir_open
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; Try to find the file, has to be PRG
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@lp_find:
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jsr fs_cbm_nextdirentry
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+bcs dos_EXIT
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; Only accept files of type 'PRG', properly closed XXX deduplicate with fs_vfs
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lda PAR_FTYPE
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and #%10111111
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cmp #$82
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bne @lp_find
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; Check if file name matches the filter XXX deduplicate with fs_vfs
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jsr util_dir_filter
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bne @lp_find ; if does not match, try the next entry
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; Found the file, load it
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lda #$03 ; mode: read file
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sta F0_MODE
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lda F0_LOADTRACK
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sta PAR_TRACK
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lda F0_LOADSECTOR
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sta PAR_SECTOR
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jmp fs_cbm_nextfileblock_got_ts
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