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low-cost seek (#438)
* low-cost seek * update constants Co-authored-by: 4am <a2_4am@sent.com>
This commit is contained in:
Peter Ferrie
GitHub
parent
fcfac849b5
commit
88afde9c79
@ -11,21 +11,20 @@
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; ...unused...
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; E000..E3FF - HGR font data
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; ...unused...
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; E8FF..FFEE - main program code
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; E8F2..FFEE - main program code
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; FFEF..FFF9 - API functions and global constants available for main program
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; code, prelaunchers, transition effects, &c.
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; (LoadFileDirect, Wait/UnwaitForVBL, MockingboardStuff, MachineStatus)
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; FFFA..FFFF - NMI, reset, IRQ vectors
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;
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; LC RAM BANK 2
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; D000..D3FF - ProRWTS data
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; D400..D6C3 - ProRWTS code
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; D6C4..DAB9 - ProRWTS glue code
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; DABA..DABF - backup of stack (during gameplay and self-running demos)
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; DAC0..DAC5 - okvs cache (attract state saved across self-running demo)
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; D000..D5FF - ProRWTS data
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; D600..D8B4 - ProRWTS code
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; D8C5..DC86 - ProRWTS glue code
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; DC87..DC8C - backup of stack (during gameplay and self-running demos)
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; DC8D..DC92 - okvs cache (attract state saved across self-running demo)
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; ...unused...
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; DBB4..DBFF - (de)acceleration function
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; DC00..DFFF - unused
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; DFB4..DFFF - (de)acceleration function
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;
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; MAIN MEMORY DURING SEARCH/BROWSE MODE
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; 6000..9FFF - search index
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@ -176,7 +175,7 @@ MockingboardStuff = $FFF8 ; bit 7 = 1 if speech chip present (Mockingboard "C"
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MachineStatus = $FFF9
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; LC RAM 2
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DisableAccelerator = $DBB4
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DisableAccelerator = $DFB4
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EnableAccelerator = DisableAccelerator+3
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; AND masks for MockingboardStuff
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@ -198,11 +197,11 @@ CHEATS_ENABLED = %00001000
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PRELAUNCH_STANDARD_SIZE = 61 ; LoadStandardPrelaunch, eventually to be determined at build-time
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; shared symbols for prelaunch and effects to call ProRWTS2 functions
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iCurBlockLo = $D401 ; constant
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iCurBlockHi = $D403 ; constant
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launchpatch = $D662 ; glue.launch.a
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iAddToPath = $FEA5 ; Roger Rabbit, avoid, use Infiltrator 2 style instead
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itraverse = $D964 ; Roger Rabbit, avoid, use Infiltrator 2 style instead
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iCurBlockLo = $D601 ; constant
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iCurBlockHi = $D603 ; constant
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launchpatch = $D853 ; glue.launch.a
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iAddToPath = $FEC7 ; Roger Rabbit, avoid, use Infiltrator 2 style instead
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itraverse = $DB31 ; Roger Rabbit, avoid, use Infiltrator 2 style instead
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ldrlo = $55 ; constant
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ldrhi = $56 ; constant
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namlo = $57 ; constant
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@ -1,5 +1,5 @@
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;license:MIT
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;(c) 2019-2020 by 4am & qkumba
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;(c) 2019-2021 by 4am & qkumba
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;
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; Pseudo-ProDOS environment
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;
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@ -218,63 +218,37 @@ ProDOS_enter
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resetval=$f0
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@imp_seek
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jsr @set_rdwrbuff
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ldx #0
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stx blkidx
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stx treeidx
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stx blkofflo
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stx blkoffhi
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stx reqcmd
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ldy sizelo
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beq @testzero
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@seekloop
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jsr @reset
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ldy sizelo
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bne @seek64
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cmp ldrhi
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bcc @seek64
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bne @seek32
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cpx ldrlo
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bne @seek64
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@seek32
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lda sizelo
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lsr
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pha
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lda ldrhi
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ldx ldrlo
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@seek64
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sta sizehi
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stx sizelo
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lda ldrhi
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pha
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lda sizehi
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pha
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lda ldrlo
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pha
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txa
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pha
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tya
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pha
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jsr @seekreset
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ror
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sta blkidx
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pla
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tay
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sec
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pla
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sta ldrlo
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pla
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sbc ldrlo
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sta ldrlo
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pla
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sta ldrhi
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pla
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sbc ldrhi
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sta ldrhi
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@testzero
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tya
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sbc #0
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tax
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lda istree
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beq @sametree
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inx
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cpx treeidx
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beq @sametree
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stx treeidx
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ldx hddtreebuf, y
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lda hddtreebuf + 256, y
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jsr hddreaddirsel
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@sametree
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lda ldrlo
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sta sizelo
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ora ldrlo
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ora ldrhi
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bne @seekloop
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lda ldrhi
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and #1
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sta sizehi
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ora sizelo
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beq @link_jmpzp
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jsr @seekreset
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@link_jmpzp
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jmp @jmp_zp
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jmp @restore_zp
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@seekreset
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jsr hddrdwrpart
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@ -341,12 +315,14 @@ resetval=$f0
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stx dirbufpatch9+2
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stx dirbufpatch10+1
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stx dirbufpatch11+1
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stx dirbufpatch12+1
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stx dirbufpatch13+2
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inx
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stx dirbufpatch5+2
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stx dirbufpatch8+2
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stx dirbufpatch14+2
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inx
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stx treebufpatch1+1
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stx treebufpatch2+2
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inx
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stx treebufpatch3+2
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@close_ret
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rts
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@ -45,12 +45,12 @@ ver_02 = 1
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allow_saplings=1 ;enable support for saplings
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allow_trees = 1 ;enable support for tree files, as opposed to only seedlings and saplings
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;required in RWTS mode if file > 128kb
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fast_trees = 0 ;keep tree block in memory, requires an additional 512 bytes of RAM
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fast_trees = 1 ;keep tree block in memory, requires an additional 512 bytes of RAM
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always_trees = 0 ;set to 1 if the only file access involves tree files
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;not compatible with allow_subdir, allow_saplings
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;required in RWTS mode if allow_trees is enabled
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detect_treof = 0 ;detect EOF during read of tree files
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fast_subindex= 0 ;keep subindex block in memory, requires an additional 512 bytes of RAM
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fast_subindex= 1 ;keep subindex block in memory, requires an additional 512 bytes of RAM
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;halves the disk access for double the speed (ideal for RWTS mode)
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allow_sparse = 1 ;enable support for reading sparse files
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write_sparse = 0 ;enable support for writing to sparse files (blocks are allocated even if empty)
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@ -93,7 +93,7 @@ ver_02 = 1
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reloc = $fe00 ;page-aligned, as high as possible, the ideal value will be shown on mismatch
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} ;PASS2
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} else { ;load_high = 0
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reloc = $d400 ;page-aligned, but otherwise wherever you want
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reloc = $d600 ;page-aligned, but otherwise wherever you want
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} ;load_high = 1
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} else { ;load_banked = 0
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!if load_high = 1 {
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@ -1453,9 +1453,6 @@ rdwrloop
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!if aligned_read = 0 {
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php
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} ;aligned_read = 0
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lda #>dirbuf
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sta adrhi
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sty adrlo
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;fetch tree data block and read it
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@ -1490,6 +1487,8 @@ noteof1
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} ;detect_treof = 1
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!if fast_trees = 0 {
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lda #>dirbuf
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sta adrhi
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jsr seekrd
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} else { ;fast_trees = 1
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jsr readdirsel
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@ -2528,8 +2527,20 @@ seek1 sta blkidx
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hddopendir
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unrhddblocklo = unrelochdd + (* - reloc)
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!ifdef PASS2 {
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} else { ;PASS2
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!if (* + 1) != iCurBlockLo {
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!error "iCurBlockLo=",* + 1, ", fix constants.a, rebuild prelaunch"
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}
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}
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ldx #2
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unrhddblockhi = unrelochdd + (* - reloc)
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!ifdef PASS2 {
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} else { ;PASS2
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!if (* + 1) != iCurBlockHi {
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!error "iCurBlockHi=",* + 1, ", fix constants.a, rebuild prelaunch"
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}
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}
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lda #0
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jsr hddreaddirsel
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@ -2794,6 +2805,7 @@ dirbufpatch11
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ldy #>hdddirbuf
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bvc +
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!if fast_trees = 1 {
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treebufpatch1
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ldy #>hddtreebuf
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} ;fast_trees = 1
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sty istree
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@ -3070,10 +3082,6 @@ encbufpatch2
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!if aligned_read = 0 {
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php
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} ;aligned_read = 0
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dirbufpatch12
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lda #>hdddirbuf
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sta adrhi
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sty adrlo
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} else { ;rwts_mode = 1
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!if fast_subindex = 0 {
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;read whenever block index changes
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@ -3148,16 +3156,16 @@ blkidx = * + 1
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!if rwts_mode = 0 {
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inc treeidx
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} ;rwts_mode = 0
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dirbufpatch13
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ldx hdddirbuf, y
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dirbufpatch14
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lda hdddirbuf + 256, y
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} else { ;fast_trees = 1
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ldy treeidx
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!if rwts_mode = 0 {
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inc treeidx
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} ;rwts_mode = 0
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treebufpatch2
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ldx hddtreebuf, y
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treebufpatch3
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lda hddtreebuf + 256, y
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} ;fast_trees = 0
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!if detect_treof = 1 {
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@ -3182,6 +3190,9 @@ hddnoteof1
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} ;detect_treof = 1
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!if fast_trees = 0 {
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dirbufpatch12
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lda #>hdddirbuf
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sta adrhi
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jsr hddseekrd
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} else { ;fast_trees = 1
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jsr hddreaddirsel
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@ -3752,7 +3763,7 @@ hdddataend
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!pseudopc ((dataend + $ff) & -256) {
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dirbuf = *
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}
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!if aligned_read = 0 {
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!if ((aligned_read xor 1) + enable_write) > 0 {
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encbuf = dirbuf + $200
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} ;aligned_read
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!if allow_trees = 1 {
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@ -3892,15 +3903,15 @@ hdddataend
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}
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!if ((aligned_read xor 1) + rwts_mode) > 0 {
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!if fast_subindex = 0 {
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hddencbuf = hdddirbuf - $200
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hddencbuf = hdddirbuf ;writes come from cache
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} else { ;fast_subindex = 1
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hddencbuf = hdddirbuf + $200
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hddencbuf = hdddirbuf - $200
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} ;fast_subindex
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} ;aligned_read = 0 or rwts_mode = 1
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!if allow_trees = 1 {
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!if fast_trees = 1 {
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!if ((aligned_read xor 1) + enable_write) > 0 {
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hddtreebuf = hddencbuf + $200
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hddtreebuf = hddencbuf + $400
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} else { ;aligned_read = 1 and enable_write = 0
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hddtreebuf = hdddirbuf + $200
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} ;aligned_read = 0 or enable_write = 1
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