126 lines
2.5 KiB
ArmAsm
126 lines
2.5 KiB
ArmAsm
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;; START wedge support
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wedge_dos:
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;; Close all the channels, so that wedge has full control
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jsr via_ICLALL
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;; Set file parameters, channel 15 is a typical one for commands
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jsr select_device ; sets X register
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lda #$0F
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ldy #$0F
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jsr JSETFLS
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;; Now we have to check what the user wants us to do
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;; Check if user asked for a status
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ldy #$00
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lda (basic_current_statement_ptr), y
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beq wedge_dos_status
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cmp #$20
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beq wedge_dos_status
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;; XXX consider SYNTAX ERROR if anything besides spaces is there
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;; Check if asked for a directory
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cmp #$24
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beq wedge_dos_directory
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*
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;; Check if asked to change drive number, or if it is a regular command
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cmp #$30
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bmi wedge_dos_command ; char code before 0
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cmp #$3A
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bpl wedge_dos_command ; char code after 9
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iny
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lda (basic_current_statement_ptr), y
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beq wedge_dos_change_drive ; end of buffer
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cmp #$20
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beq wedge_dos_change_drive
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;; XXX consider SYNTAX ERROR if anything besides spaces is there
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jmp -
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wedge_dos_command:
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;; Set remaining file parameters, open the channel
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lda #$00 ; empty file name
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jsr JSETNAM
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jsr via_IOPEN
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bcc +
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jmp do_DEVICE_NOT_PRESENT_error
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*
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;; Set channel for output
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ldx #$0F
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jsr via_ICKOUT
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*
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jsr JREADST ; retrieve errors
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;; XXX error in case of status != 0
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*
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jsr basic_fetch_and_consume_character
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beq +
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jsr JCHROUT
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;; XXX check errors here
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jmp -
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*
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;; XXX check status - print it if not OK
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;; Clean-up and exit
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jmp wedge_dos_clean_exit
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wedge_dos_change_drive:
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;; Reuse the line number parser for device number retrieval
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jsr basic_parse_line_number
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lda basic_line_number+1
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beq +
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jmp do_ILLEGAL_QUANTITY_error
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*
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lda basic_line_number+0
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cmp #$08
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bpl +
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bcs +
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jmp do_ILLEGAL_DEVICE_NUMBER_error
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*
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sta current_device_number
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jmp basic_end_of_line
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wedge_dos_status:
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;; Here the flow is mostly the same as in the example from
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;; https://codebase64.org/doku.php?id=base:reading_the_error_channel_of_a_disk_drive
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;; Set remaining file parameters, open the channel
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lda #$00 ; empty file name
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jsr JSETNAM
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jsr via_IOPEN
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bcc +
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jmp do_DEVICE_NOT_PRESENT_error
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*
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;; Set channel for input
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ldx #$0F
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jsr via_ICHKIN
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*
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jsr JREADST ; retrieve errors
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;; XXX error in case of status != 0
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*
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;; Print out everything retrieved from the drive
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bne +
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jsr JCHRIN
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jsr JCHROUT
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jmp -
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*
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;; Clean-up and exit
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jmp wedge_dos_clean_exit
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wedge_dos_directory:
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;; XXX - implement this
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jsr printf
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.byte "DBG: DIR", 0
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jmp do_NOT_IMPLEMENTED_error
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wedge_dos_clean_exit:
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jsr via_ICLALL
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jsr via_ICLRCH
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jmp basic_end_of_line
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;; END wedge support
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