FeralChild64
86a7af378d
Retrieving the status (@) should teoretically work, but several KERNAL routines are still missing or incomplete
125 lines
2.4 KiB
ArmAsm
125 lines
2.4 KiB
ArmAsm
|
|
;; START wedge support
|
|
|
|
wedge_dos:
|
|
|
|
;; Close all the channels, so that wedge has full control
|
|
jsr wedge_dos_CLALL
|
|
|
|
;; Take last device number, make sure it's a drive
|
|
;; If not, set to 8 (first drive number)
|
|
ldx DFLTN
|
|
cpx #$07
|
|
bpl +
|
|
bcs +
|
|
ldx #$08
|
|
*
|
|
;; Set remaining file parameters; channel 15 is a typical one for commands
|
|
lda #$0F
|
|
ldy #$0F
|
|
jsr $FFBA ; SETLFS
|
|
|
|
;; Now we have to check what the user wants us to do
|
|
|
|
;; Check if user asked for a status
|
|
ldy #$00
|
|
lda (basic_current_statement_ptr), y
|
|
beq wedge_dos_status
|
|
cmp #$20
|
|
beq wedge_dos_status
|
|
;; XXX consider SYNTAX ERROR if anything besides spaces is there
|
|
|
|
;; Check if asked for a directory
|
|
cmp #$24
|
|
beq wedge_dos_directory
|
|
*
|
|
;; Check if asked to change drive number, or if it is a regular command
|
|
cmp #$30
|
|
bmi wedge_dos_command ; char code before 0
|
|
cmp #$3A
|
|
bpl wedge_dos_command ; char code after 9
|
|
iny
|
|
lda (basic_current_statement_ptr), y
|
|
beq wedge_dos_change_drive ; end of buffer
|
|
cmp #$20
|
|
beq wedge_dos_change_drive
|
|
;; XXX consider SYNTAX ERROR if anything besides spaces is there
|
|
jmp -
|
|
|
|
wedge_dos_command: ; default
|
|
|
|
;; XXX - implement this
|
|
jsr printf
|
|
.byte "DBG: CMD", 0
|
|
jmp do_NOT_IMPLEMENTED_error
|
|
|
|
wedge_dos_change_drive:
|
|
|
|
;; Reuse the line number parser for device number retrieval
|
|
jsr basic_parse_line_number
|
|
lda basic_line_number+1
|
|
beq +
|
|
jmp do_ILLEGAL_QUANTITY_error
|
|
*
|
|
lda basic_line_number+0
|
|
cmp #$08
|
|
bpl +
|
|
bcs +
|
|
jmp do_ILLEGAL_DEVICE_NUMBER_error
|
|
*
|
|
sta DFLTN
|
|
jmp basic_end_of_line
|
|
|
|
wedge_dos_status:
|
|
|
|
;; Here the flow is mostly the same as in the example from
|
|
;; https://codebase64.org/doku.php?id=base:reading_the_error_channel_of_a_disk_drive
|
|
|
|
;; Set remaining file parameters, open the channel
|
|
lda #$00 ; empty file name
|
|
jsr $FFBD ; SETNAM
|
|
jsr wedge_dos_OPEN
|
|
bcc +
|
|
jmp do_DEVICE_NOT_PRESENT_error
|
|
*
|
|
;; Set channel for input
|
|
ldx #$0F
|
|
jsr wedge_dos_CHKIN
|
|
*
|
|
jsr $FFB7 ; READST - to retrieve errors
|
|
*
|
|
;; Print out everything retrieved from the drive
|
|
bne +
|
|
jsr $FFCF ; CHRIN
|
|
jsr $FFD2 ; CHROUT
|
|
jmp -
|
|
*
|
|
;; Clean-up and exit
|
|
jmp wedge_dos_clean_exit
|
|
|
|
wedge_dos_directory:
|
|
|
|
;; XXX - implement this
|
|
jsr printf
|
|
.byte "DBG: DIR", 0
|
|
jmp do_NOT_IMPLEMENTED_error
|
|
|
|
wedge_dos_CLALL:
|
|
jmp (ICLALL)
|
|
|
|
wedge_dos_CHKIN:
|
|
jmp (ICHKIN)
|
|
|
|
wedge_dos_CLRCHR:
|
|
jmp (ICLRCH)
|
|
|
|
wedge_dos_OPEN:
|
|
jmp (IOPEN)
|
|
|
|
wedge_dos_clean_exit:
|
|
jsr wedge_dos_CLALL
|
|
jsr wedge_dos_CLRCHR
|
|
jmp basic_end_of_line
|
|
|
|
;; END wedge support
|