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CBDOS can now return floppy header

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This commit is contained in:
FeralChild64 committed 2021-03-04 18:22:36 +01:00
1 parent 70887cc53c
commit 52b2686f0e
6 files changed
+144 -93
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src/dos_m65/,aliases_dos.s
+42 -40
View File
@@ -109,14 +109,7 @@
!addr FD_STATUS_IDX = $806E ; - floppy
!addr RD_STATUS_IDX = $806F ; - ram disk
!addr DMAJOB_LIST = $8070 ; 15 bytes, a general purpose DMA list
!addr DMAJOB_SRC_MB = DMAJOB_LIST+2
!addr DMAJOB_DST_MB = DMAJOB_LIST+4
!addr DMAJOB_SIZE = DMAJOB_LIST+7 ; keep $0200 here
!addr DMAJOB_SRC_ADDR = DMAJOB_LIST+9
!addr DMAJOB_DST_ADDR = DMAJOB_LIST+12
!addr SD_DESC = $807F ; current file descriptor
!addr SD_DESC = $8070 ; current file descriptor
@@ -129,54 +122,63 @@
; BAM cache for floppy drives; 2 KB (4 blocks) each, to cover up to ED floppies - XXX implementation to be written
!addr FD_BAM_CACHE_0 = $8A00 ; - floppy drive 0
!addr FD_BAM_CACHE_1 = $8E00 ; - floppy drive 1
!addr FD_BAM_CACHE_0 = $8200 ; - floppy drive 0
!addr FD_BAM_CACHE_1 = $8600 ; - floppy drive 1
; General purpose buffers, 512 bytes each, each starts at page start - XXX dynamic alllocation to be written
!addr SHARED_BUF_0 = $9200 ; XXX temporarily hardcoded for usage by SD card
!addr SHARED_BUF_1 = $9400 ; XXX temporarily hardcoded for usage by floppy
!addr SHARED_BUF_2 = $9600
!addr SHARED_BUF_3 = $9800
!addr SHARED_BUF_4 = $9A00
!addr SHARED_BUF_5 = $9C00
!addr SHARED_BUF_6 = $9E00
!addr SHARED_BUF_7 = $A000
!addr SHARED_BUF_8 = $A200
!addr SHARED_BUF_9 = $A400
!addr SHARED_BUF_A = $A600
!addr SHARED_BUF_B = $A800
!addr SHARED_BUF_C = $AA00
!addr SHARED_BUF_D = $AC00
!addr SHARED_BUF_E = $AE00
!addr SHARED_BUF_F = $B000
!addr SHARED_BUF_0 = $8A00 ; XXX temporarily hardcoded for usage by SD card
!addr SHARED_BUF_1 = $8C00 ; XXX temporarily hardcoded for usage by floppy
!addr SHARED_BUF_2 = $8E00
!addr SHARED_BUF_3 = $9000
!addr SHARED_BUF_4 = $9200
!addr SHARED_BUF_5 = $9400
!addr SHARED_BUF_6 = $9600
!addr SHARED_BUF_7 = $9800
!addr SHARED_BUF_8 = $9A00
!addr SHARED_BUF_9 = $9C00
!addr SHARED_BUF_A = $9E00
!addr SHARED_BUF_B = $A000
!addr SHARED_BUF_C = $A200
!addr SHARED_BUF_D = $A400
!addr SHARED_BUF_E = $A600
!addr SHARED_BUF_F = $A800
; Memory shadow, needed for SD card support
!addr SD_MEMSHADOW_BUF = $8200 ; 256 byte buffer for preserving original memory content
!addr SD_MEMSHADOW_BUF = $AA00 ; 256 byte buffer for preserving original memory content
; Command/filename buffers, 128 bytes each - XXX extend to 256 bytes (change implementation)
!addr SD_CMDFN_BUF = $B300 ; - SD card
!addr FD_CMDFN_BUF = $B400 ; - floppy
!addr RD_CMDFN_BUF = $B500 ; - ram disk
!addr SD_CMDFN_BUF = $AB00 ; - SD card
!addr FD_CMDFN_BUF = $AC00 ; - floppy
!addr RD_CMDFN_BUF = $AD00 ; - ram disk
; Directory entry buffers, in BASIC format, $30 bytes each
!addr XX_DIRENT_BUF = $B600
!addr SD_DIRENT_BUF = $B600 ; - SD card
!addr FD_DIRENT_BUF = $B630 ; - floppy
!addr RD_DIRENT_BUF = $B660 ; - ram disk
!addr XX_DIRENT_BUF = $AE00
!addr SD_DIRENT_BUF = $AE00 ; - SD card
!addr FD_DIRENT_BUF = $AE30 ; - floppy
!addr RD_DIRENT_BUF = $AE60 ; - ram disk
; Status buffers, content terminated by 0, $30 bytes each
!addr XX_STATUS_BUF = $B690
!addr SD_STATUS_BUF = $B690 ; - SD card
!addr FD_STATUS_BUF = $B6C0 ; - floppy
!addr RD_STATUS_BUF = $B6F0 ; - ram disk
!addr XX_STATUS_BUF = $AE90
!addr SD_STATUS_BUF = $AE90 ; - SD card
!addr FD_STATUS_BUF = $AEC0 ; - floppy
!addr RD_STATUS_BUF = $AEF0 ; - ram disk
; Common DMA list
!addr DMAJOB_LIST = $AF20 ; 15 bytes, a general purpose DMA list
!addr DMAJOB_SRC_MB = DMAJOB_LIST+2
!addr DMAJOB_DST_MB = DMAJOB_LIST+4
!addr DMAJOB_SIZE = DMAJOB_LIST+7 ; keep $0200 here
!addr DMAJOB_SRC_ADDR = DMAJOB_LIST+9
!addr DMAJOB_DST_ADDR = DMAJOB_LIST+12
;
; Reserved 18 KB for floppy track buffers + some area for track metadata
; Reserved 20 KB for floppy track buffers + some area for track metadata
;
!addr XX_REMAINING = $B720
!addr XX_REMAINING = $AF2F
src/dos_m65/assets/dos_parts_dir.s
+3 -3
View File
@@ -9,9 +9,9 @@ dir_hdr: ; 32 bytes - header
!byte $01, $01 ; link to the next line - dummy, will be regenerated by BASIC
!byte $00, $00 ; line number 0
!byte $12, $22 ; reverse mode, quote
!pet " " ; space for disk/directory name
!pet " " ; space for disk/directory name XXX should be space, or shift+space?
!byte $22, $20 ; quote, space
!pet "00 2a" ; default ID, disk format
!pet " 2a" ; default ID, disk format
!byte $00 ; end of the line
dir_hdr_sd: ; 32 bytes - header
@@ -20,7 +20,7 @@ dir_hdr_sd: ; 32 bytes - header
!byte $01, $01 ; link to the next line - dummy, will be regenerated by BASIC
!byte $00, $00 ; line number 0
!byte $12, $22 ; reverse mode, quote
!pet "sd card " ; space for disk/directory name
!pet "sd card " ; space for disk/directory name XXX should be space, or shift+space?
!byte $22, $20 ; quote, space
!pet "fat32" ; filesystem
!byte $00 ; end of the line
src/dos_m65/dev_floppy/dev_fd_cmd_open.s
-17
View File
@@ -58,20 +58,3 @@ dev_fd_cmd_OPEN_dir:
@lp1_end:
jmp fs_1581_read_dir_open
; XXX experimental code below
; Try to read track 40, sector 0 (disk header)
lda #40
sta PAR_TRACK
lda #$00
sta PAR_SECTOR
jsr dev_fd_util_readsector
; XXX continue implementation
jmp dos_EXIT_CLC
src/dos_m65/dev_floppy/dev_fd_util_readsector.s
+20 -27
View File
@@ -14,42 +14,35 @@ dev_fd_util_readsector:
; Select physical track and sector based on logical ones from PAR_TRACK and PAR_SECTOR
; lda PAR_TRACK
; dec
; sta FDC_TRACK ; $D084
lda PAR_TRACK
dec
sta FDC_TRACK ; $D084
; lda PAR_SECTOR
; cmp #20
; bcc @side0
lda PAR_SECTOR
cmp #20
bcc @side0
@side1:
; lda #%00001000 ; set side 1
; tsb FDC_CONTROL ; $D080
lda #%00001000 ; set side 1
tsb FDC_CONTROL ; $D080
; lda PAR_SECTOR
; sec
; sbc #20
lda PAR_SECTOR
sec
sbc #20
; ldx #$01
; +skip_2_bytes_trash_nvz
ldx #$01
+skip_2_bytes_trash_nvz
@side0:
; ldx #$00
; stx FDC_SIDE ; $D086
; clc
; ror
; sta FDC_SECTOR ; $D085
; XXX temporary code, just for testing (replacement for the commented-out code)
lda #39
sta FDC_TRACK ; $D084
lda #00
ldx #$00
stx FDC_SIDE ; $D086
clc
ror
inc
sta FDC_SECTOR ; $D085
lda #00
sta FDC_SIDE ; $D086
; Ask the controller to read the sector XXX how to detect errors, missing disk, etc.?
@@ -73,7 +66,7 @@ dev_fd_util_readsector:
@lp3:
lda FDC_STATUS_A ; $D082
and #%01100000
cmp #%01100000 ; XXX is this correct? .A seems to stay at $40 at this point
cmp #%01000000 ; XXX is this correct? .A seems to stay at $40 at this point
bne @lp3
; Copy sector to buffer in RAM
src/dos_m65/dev_floppy/fs_1581_read_dir.s
+50 -1
View File
@@ -15,10 +15,59 @@ fs_1581_read_dir_open:
jsr dev_fd_util_readsector ; XXX handle read errors
; Create the first directory listing entry (title, id)
ldx #$1F ; first fetch the template
@lp1:
lda dir_hdr,x
sta FD_DIRENT_BUF,x
dex
bpl @lp1
ldx #$0F ; file name
@lp2:
lda SHARED_BUF_1+$04,x
sta FD_DIRENT_BUF+$08,x
dex
bpl @lp2
lda SHARED_BUF_1+$16 ; disk ID XXX test this on a disk with ID
cmp #$A0
beq @skip1
sta FD_DIRENT_BUF+$1A
@skip1:
lda SHARED_BUF_1+$17
cmp #$A0
beq @skip2
sta FD_DIRENT_BUF+$1B
@skip2:
; XXX continue implementation
lda SHARED_BUF_1+$19 ; dos version
sta FD_DIRENT_BUF+$1D
lda SHARED_BUF_1+$1A
sta FD_DIRENT_BUF+$1E
; Provide pointer to the header
lda #$20
sta FD_ACPTR_LEN+0
lda #$00
sta FD_ACPTR_LEN+1
lda #<FD_DIRENT_BUF
sta FD_ACPTR_PTR+0
lda #>FD_DIRENT_BUF
sta FD_ACPTR_PTR+1
; Set directory phase to 'file name'
lda #$01
sta FD_DIR_PHASE
; XXX copy 1st half of BAM
; XXX preload the next entry
; XXX copy 2nd half of BAM
; End
jmp dos_EXIT_CLC
src/dos_m65/msg_acptr.s
+29 -5
View File
@@ -11,13 +11,13 @@ msg_ACPTR:
; Check if there is a talker active
ldx IDX1_TALKER
bmi msg_ACPTR_fail_no_talker
+bmi msg_ACPTR_fail_no_talker
; Check if active channel is status one
lda XX_CHANNEL, X
cmp #$0F
beq msg_ACPTR_status
+beq msg_ACPTR_status
; XXX add support for read contexts (multiple channels)
@@ -26,7 +26,7 @@ msg_ACPTR:
ldx IDX2_TALKER
lda XX_ACPTR_LEN+0,x
ora XX_ACPTR_LEN+1,x
beq msg_ACPTR_fail_no_data
+beq msg_ACPTR_fail_no_data
; Read a byte of data from the buffer
@@ -62,11 +62,35 @@ msg_ACPTR_read_SD:
@3:
jmp dos_EXIT_CLC
msg_ACPTR_read_FD:
; XXX provide implementation
; Read and return one byte
jsr FD_ACPTR_helper
sta TBTCNT
sta REG_A
; Increment pointer, decrement length
inc FD_ACPTR_PTR+0
bne @1
inc FD_ACPTR_PTR+1
@1:
dec FD_ACPTR_LEN+0
lda FD_ACPTR_LEN+0
cmp #$FF
bne @2
dec FD_ACPTR_LEN+1
@2:
; If new length is 0, try to read next block of data
ora FD_ACPTR_LEN+1
bne @3
jsr dev_fd_cmd_READ
bcc @3
jsr kernalstatus_EOI
@3:
jmp dos_EXIT_CLC
msg_ACPTR_read_RD: