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git-svn-id: http://svn.code.sf.net/p/netboot65/code@173 93682198-c243-4bdb-bd91-e943c89aac3b
This commit is contained in:
jonnosan
parent
79a6bcb04f
commit
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@ -12,6 +12,7 @@
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.export io_sector_no
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.export io_track_no
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.export io_read_sector
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.export io_read_catalogue
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.export io_read_file_with_callback
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.export io_filename
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@ -55,6 +56,16 @@ jmp_to_callback:
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io_callback=jmp_to_callback+1
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write_byte_to_buffer:
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tmp_buffer_ptr=write_byte_to_buffer+1
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sta $ffff
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inc tmp_buffer_ptr
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bne :+
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inc tmp_buffer_ptr
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:
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rts
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.code
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;routine to read a file with a callback after each 256 byte sector
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@ -91,8 +102,6 @@ io_read_file_with_callback:
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jsr open_error_channel
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@no_error_opening_error_channel:
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jsr check_error_channel
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lda #$30
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cmp error_buffer
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@ -120,7 +129,7 @@ io_read_file_with_callback:
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sta (buffer_ptr),y
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inc buffer_counter
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bne @get_next_byte
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ldy #$00;= 256 bytes
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jsr jmp_to_callback
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jmp @get_next_sector
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@ -138,7 +147,7 @@ io_read_file_with_callback:
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@close:
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lda #$02 ; filenumber 2
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jsr CLOSE
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ldx #$00
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ldx #$00 ;keyboard now used as input
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jsr CHKIN
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clc
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rts
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@ -167,6 +176,82 @@ parse_filename:
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ldy buffer_ptr+1
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rts
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;routine to catalogue disk
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; io_device_number set to specify drive to use ($00 = same as last time, $01 = first disk (i.e. #8), $02 = 2nd disk (drive #9))
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; AX - address of buffer to read catalogue into
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; outputs:
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; on errror, carry flag is set.
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io_read_catalogue:
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stax tmp_buffer_ptr
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;get the BAM
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lda #$12
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sta io_track_no
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lda #00
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sta io_sector_no
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ldax #output_buffer
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jsr io_read_sector
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bcs @end_catalogue
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@get_next_catalogue_sector:
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clc
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lda output_buffer
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beq @end_catalogue
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sta io_track_no
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lda output_buffer+1
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sta io_sector_no
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ldax #output_buffer
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jsr io_read_sector
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bcs @end_catalogue
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ldy #0
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@read_one_file:
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tya
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pha
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lda output_buffer+2,y ;file type
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and #$7f
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beq @skip_to_next_file
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; bpl @skip_to_next_file
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@get_next_char:
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lda output_buffer+5,y ;file type
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beq @end_of_filename
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cmp #$a0
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beq @end_of_filename
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jsr write_byte_to_buffer
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iny
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jmp @get_next_char
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@end_of_filename:
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lda #0
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jsr write_byte_to_buffer
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pla
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pha
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tay ;get Y back to start of this file entry
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lda output_buffer+2,y ;file type
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jsr write_byte_to_buffer
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lda output_buffer+30,y ;lo byte of file length in sectors
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jsr write_byte_to_buffer
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lda output_buffer+31,y ;hi byte of file length in sectors
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jsr write_byte_to_buffer
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@skip_to_next_file:
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pla
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clc
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adc #$20
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tay
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bne @read_one_file
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jmp @get_next_catalogue_sector
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@end_catalogue:
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lda #0
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jsr write_byte_to_buffer
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jsr write_byte_to_buffer
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rts
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;routine to read a sector
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;cribbed from http://codebase64.org/doku.php?id=base:reading_a_sector_from_disk
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;inputs:
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@ -20,20 +20,20 @@ allowed_ptr=copy_src ;reuse zero page
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;inputs: none
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;outputs: A contains ASCII value of key just pressed
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get_key:
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jsr $ffe4
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jsr get_key_if_available
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beq get_key
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rts
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;use C64 Kernel ROM function to read a key
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;inputs: none
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;outputs: A contains ASCII value of key just pressed (0 if no key pressed)
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get_key_if_available=$ffe4
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get_key_if_available=$f142 ;not officially documented - where F13E (GETIN) falls through to if device # is 0 (KEYBD)
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;process inbound ip packets while waiting for a keypress
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get_key_ip65:
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jsr ip65_process
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jsr $ffe4
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jsr get_key_if_available
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beq get_key_ip65
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rts
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@ -48,7 +48,7 @@ check_for_abort_key:
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cmp #$3F
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bne @not_abort
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@flush_loop:
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jsr $ffe4
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jsr get_key_if_available
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bne @flush_loop
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lda $cb ;current key pressed
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cmp #$3F
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@ -17,6 +17,7 @@
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.import io_callback
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.import get_key
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.import ip65_error
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.import io_read_catalogue
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.macro cout arg
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lda arg
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@ -33,6 +34,8 @@ current_byte_in_row: .res 1
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current_byte_in_sector: .res 1
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start_of_current_row: .res 1
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directory_buffer: .res 4096
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.segment "STARTUP" ;this is what gets put at the start of the file on the C64
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.word basicstub ; load address
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@ -51,6 +54,30 @@ basicstub:
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init:
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ldax #read_catalogue
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jsr print
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; ldax #dummy_catalogue
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; jsr print_catalogue
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; rts
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lda #01
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sta io_device_no
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ldax #directory_buffer
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jsr io_read_catalogue
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bcc @no_error_on_catalogue
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jsr print_error_code
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rts
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@no_error_on_catalogue:
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ldax #directory_buffer
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jsr print_catalogue
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rts
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ldax #loading
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jsr print
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ldax #fname
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@ -119,6 +146,51 @@ init:
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jsr print_hex
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rts
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;print catalogue pointed at by AX
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print_catalogue:
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stax tmp_buffer_ptr
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@print_one_filename:
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jsr read_byte_from_buffer
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beq @catalogue_done
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@print_one_char:
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jsr print_a
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jsr read_byte_from_buffer
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beq @end_of_filename
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jmp @print_one_char
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@end_of_filename:
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jsr print_cr
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ldax #filetype
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jsr print
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jsr read_byte_from_buffer
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jsr print_hex
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ldax #sectors
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jsr print
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jsr read_byte_from_buffer
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pha
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jsr read_byte_from_buffer
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jsr print_hex
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pla
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jsr print_hex
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jsr print_cr
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jmp @print_one_filename
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@catalogue_done:
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rts
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read_byte_from_buffer:
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tmp_buffer_ptr=read_byte_from_buffer+1
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lda $ffff
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inc tmp_buffer_ptr
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bne :+
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inc tmp_buffer_ptr
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:
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pha
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pla ;reload A so flags are set correctly
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rts
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readfile_callback:
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tya
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jsr print_hex
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@ -136,6 +208,14 @@ print_error_code:
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jsr print_cr
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rts
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wait_for_keypress:
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lda #0
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sta $c6 ;set the keyboard buffer to be empty
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ldax #press_a_key_to_continue
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jsr print
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jsr get_key
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rts
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dump_sector:
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;hex dump sector
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lda #0
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@ -143,7 +223,13 @@ dump_sector:
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sta start_of_current_row
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@one_row:
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lda #$80
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cmp current_byte_in_sector
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bne @dont_wait_for_key
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jsr wait_for_keypress
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@dont_wait_for_key:
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lda current_byte_in_sector
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sta start_of_current_row
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jsr print_hex
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lda #':'
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@ -187,14 +273,18 @@ dump_sector:
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bne @print_byte
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jsr print_cr
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jmp @one_row
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@last_byte:
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@last_byte:
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jsr print_cr
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jsr wait_for_keypress
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rts
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fname: .byte "$"
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fname_end:
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.byte 0
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read_catalogue:
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.byte "READING CATALOGUE",13,0
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fname:
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.byte "TEST_DISK_IO.PRG",0
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loading: .byte "LOADING ",0
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.rodata
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@ -202,6 +292,11 @@ loading: .byte "LOADING ",0
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press_a_key_to_continue:
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.byte "PRESS A KEY TO CONTINUE",13,0
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filetype:
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.byte "TYPE: $",0
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sectors:
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.byte " SECTORS: $",0
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error:
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.byte "ERROR - $", 0
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@ -214,8 +309,7 @@ ok:
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bytes:
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.byte "BYTES.",13, 0
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dirname:
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.byte "$" ; filename used to access directory
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dirname_end:
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cname: .byte '#'
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dummy_catalogue:
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.byte"FILE 1",0,$81,$34,$12
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.byte "FILE 2",0,$82,$f0,$0d
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.byte 0
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