slimmer RWTS mode
This commit is contained in:
Peter Ferrie
parent
7f7d664737
commit
ec57592a57
134
PRORWTS2.S
134
PRORWTS2.S
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@ -58,8 +58,8 @@ ver_02 = 1
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rwts_mode = 0 ;set to 1 to enable emulation of DOS RWTS when running from hard disk
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;uses a one-time open of a tree file, no other file access allowed
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;use unique volume numbers to distinguish between images in the same file
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;requires override_adr, enable_seek, allow_trees, always_trees
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;not compatible with enable_floppy, aligned_read, allow_subdir, might_exist, bounds_check
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;requires override_adr, allow_trees, always_trees
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;not compatible with enable_floppy, allow_subdir, might_exist, bounds_check
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load_high = 0 ;set to 1 to load to top of RAM (either main or banked, enables a himem check)
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load_aux = 0 ;load to aux memory
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load_banked = 1 ;set to 1 to load into banked RAM instead of main RAM (can be combined with load_aux for aux banked)
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@ -1843,29 +1843,29 @@ unrelochdd
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sty namlo
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!if ver_02 = 1 {
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lda #0
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sta reqcmd ;seek
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sta sizehi
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} else { ;ver_02
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stz reqcmd ;seek
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stz sizehi
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} ;ver_02
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ldy #$0c ;command
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!if enable_write = 1 {
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lda (namlo),y
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cmp #2 ;write (or format if greater)
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php
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bcc skipinit ;read
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beq skipinit ;write
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ldy #5 ;sector
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!if ver_02 = 1 {
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!if ver_02 = 1 {
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txa
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} else { ;ver_02
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} else { ;ver_02
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lda #0
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} ;ver_02
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} ;ver_02
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sta (namlo),y
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dey ;track
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sta (namlo),y
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skipinit
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!if allow_multi = 1 {
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} ;enable_write
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!if allow_multi = 1 {
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ldy #3 ;volume
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lda (namlo),y
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bne +
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@ -1873,14 +1873,14 @@ skipinit
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+ cmp lastvol
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sta lastvol
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bne +
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ror adrhi ;bit 7 set if same volume
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ror unit ;bit 7 set if same volume
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+ ldy #$0e ;returned volume
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sta (namlo),y
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ldx #vollist_e-vollist_b
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- dex
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cmp vollist_b,x
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bne -
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} ;allow_multi
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} ;allow_multi
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ldy #4 ;track
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lda (namlo),y
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asl
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@ -1892,7 +1892,7 @@ skipinit
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iny ;sector
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ora (namlo),y
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ldy sizehi
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!if allow_multi = 1 {
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!if allow_multi = 1 {
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- dex
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bmi ++
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clc
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@ -1903,7 +1903,7 @@ skipinit
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iny
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bne -
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++
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} ;allow_multi
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} ;allow_multi
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tax
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tya
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lsr
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@ -1912,7 +1912,24 @@ skipinit
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txa
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ror
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php
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bit unit
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bpl newtree
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cpy lasttree
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beq newblock
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;volume or tree changed, so tree changed
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newtree tax
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beq newblock ;block zero will automatically read tree
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pha
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lda #0
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jsr seek1
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pla
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;block changed, read it
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newblock jsr seek1
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plp
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bcc +
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inc adrhi
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@ -1922,17 +1939,24 @@ skipinit
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dey ;adrlo
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lda (namlo),y
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sta bloklo
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ldx #0
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ldy #0
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!if enable_write = 1 {
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ldx #0
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plp
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bcs runinit
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} ;enable_write
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- lda (adrlo),y
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sta (bloklo),y
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iny
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bne -
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!if swap_zp = 0 {
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bcc hddcopycache
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clc
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rts
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} else { ;swap_zp
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jsr hddcopycache
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beq swap_zpg
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} ;swap_zp
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!if enable_write = 1 {
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runinit bne format
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- lda (bloklo),y
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sta (adrlo),y
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@ -1961,19 +1985,18 @@ writesec sta namlo
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lda adrhi
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and #$fe
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sta adrhi
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- lda #cmdwrite
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lda #cmdwrite
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sta reqcmd
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inc lastblk ;force mismatch
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jsr hddrdwrloopx
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dec adrhi
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dec adrhi
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dec namlo
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- jsr hddrdwrloopx
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inc blkidx
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bne +
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inc treeidx
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+ dec namlo
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bne -
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dec namhi
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bpl -
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!if no_interrupts = 0 {
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clc
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} ;no_interrupts
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} ;enable_write
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!if swap_zp = 1 {
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swap_zpg
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@ -1991,20 +2014,17 @@ swap_zpg
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tay
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pla
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} ;swap_zp
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rts
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hddcopycache
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- lda (adrlo),y
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sta (bloklo),y
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iny
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bne -
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!if enable_write = 1 {
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!if no_interrupts = 0 {
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clc
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} ;no_interrupts
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rts
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blanksec !text "SAN INC."
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} ;enable_write
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seek1 sta blkidx
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lda #1
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sta sizehi
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} else { ;rwts_mode
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!if (enable_readseq + allow_subdir) > 0 {
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hddrdwrpart jmp hddrdwrfile
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@ -2473,14 +2493,14 @@ hddrdwrloop
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!if ver_02 = 1 {
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ldx #0
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stx adrlo
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!if ((enable_write + enable_seek) and (rwts_mode - 1)) > 0 {
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!if (enable_write + enable_seek) > 0 {
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inx ;ldx #cmdread
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} ;(enable_write or enable_seek) and not rwts_mode
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} ;enable_write or enable_seek
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} else { ;ver_02 = 0
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stz adrlo
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!if ((enable_write + enable_seek) and (rwts_mode - 1)) > 0 {
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!if (enable_write + enable_seek) > 0 {
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ldx #cmdread
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} ;(enable_write or enable_seek) and not rwts_mode
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} ;enable_write or enable_seek
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} ;ver_02
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+
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} ;aligned_read and rwts_mode
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@ -2517,12 +2537,6 @@ hddrdwrloop
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} else { ;rwts_mode = 1
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;or in this case, read whenever tree index changes
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!if ver_02 = 1 {
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lda #0
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sta adrlo
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} else { ;ver_02 = 0
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stz adrlo
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} ;ver_02
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ldy treeidx
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cpy lasttree
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beq skiptree
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@ -2530,8 +2544,6 @@ hddrdwrloop
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ldx blkidx
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inx
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stx lastblk
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lda #>hdddirbuf
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sta adrhi
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} ;rwts_mode
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;fetch tree data block and read it
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@ -2539,7 +2551,7 @@ hddrdwrloop
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!if fast_trees = 0 {
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ldx treeblklo
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lda treeblkhi
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jsr hddseekrd
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jsr hddreaddirsel
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ldy treeidx
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!if rwts_mode = 0 {
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inc treeidx
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@ -2573,7 +2585,11 @@ noteof1
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php
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} ;aligned_read and rwts_mode
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!if fast_trees = 0 {
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jsr hddseekrd
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} else { ;fast_trees = 1
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jsr hddreaddirsel
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} ;fast_trees
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skiptree
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!if rwts_mode = 0 {
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@ -2610,8 +2626,10 @@ skiptree
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} ;enable_write
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} ;aligned_read
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} else { ;rwts_mode = 1
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!if fast_trees = 1 {
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lda #>hddencbuf
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sta adrhi
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} ;fast_trees
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ldy blkidx
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;read whenever block index changes
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@ -2640,7 +2658,16 @@ skiptree
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fixy2 tya
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noteof2
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} ;detect_treof
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!if allow_sparse = 1 {
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!if allow_sparse = 0 {
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!if rwts_mode = 1 {
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!if enable_write = 0 {
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jmp hddseekrd
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} else { ;enable_write = 1
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ldy reqcmd
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jmp hddseekrdwr
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} ;enable_write
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} ;rwts_mode
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} else { ;allow_sparse
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pha
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ora hdddirbuf, y
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tay
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@ -2658,7 +2685,11 @@ noteof2
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dey
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iny ;don't affect carry
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!if swap_scrn = 0 {
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!if enable_write = 0 {
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bne hddseekrd
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} else { ;enable_write = 1
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bne hddseekrdwr
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} ;enable_write
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} else { ;swap_scrn = 1
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bne hddrdwrswap
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} ;swap_scrn
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@ -2725,6 +2756,8 @@ hddissparse
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bne -
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!if rwts_mode = 0 {
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beq hddresparse
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} else { ;rwts_mode = 1
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skipblk rts
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} ;rwts_mode
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} ;allow_sparse
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!if rwts_mode = 0 {
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@ -2790,8 +2823,6 @@ hddcopycache
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sta blkoffhi
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bcc hddrdwrdone ;always
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} ;aligned_read
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} else { ;rwts_mode = 1
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skipblk rts
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} ;rwts_mode
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!if swap_scrn = 1 {
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@ -2861,7 +2892,9 @@ hddreaddirsect
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unrhddrd = unrelochdd + (* - reloc)
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sty adrhi
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hddseekrd ldy #cmdread
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!if enable_write = 1 {
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!if enable_write = 0 {
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sty command
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} else { ;enable_write = 1
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!if (aligned_read + rwts_mode) > 0 {
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hddseekrdwr sty command
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} else { ;aligned_read = 0 or rwts_mode = 0
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@ -2900,6 +2933,9 @@ unrunit2 = unrelochdd + (* - reloc)
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!word readbuff + $200
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!word 2
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} ;allow_extend
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!if ((allow_sparse xor 1) and rwts_mode) = 1 {
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skipblk rts
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} ;not allow_sparse and rwts_mode
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!if (rwts_mode + allow_multi) > 1 {
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vollist_b
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@ -3098,7 +3134,7 @@ hdddataend
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} ;allow_trees and fast_trees
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!warn "hdd driver start: ", unrelochdd - init
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!if (one_page + enable_floppy) = 0 {
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!if ((hddcodeend - hddopendir) < $100) {
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!if ((hddcodeend - reloc) < $100) {
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!warn "one_page can be enabled, code is small enough"
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} ;hddcodeend
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} ;not one_page and not enable_floppy
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