;license:MIT ;(c) 2019-2020 by 4am & qkumba ; ; Pseudo-ProDOS environment ; ; /!\ These live in LC RAM 2 and rely on the ProRWTS code which is also in LC RAM 2. /!\ ;------------------------------------------------------------------------------ ; ProDOS_enter ; intercept certain ProDOS requests ; wrap them to ProRWTS2 file requests ; ; in: return address+1 is command and pointer to parameter block ; out: all flags clobbered ; A=0, X and Y preserved ; stack set to next instruction after parameters ;------------------------------------------------------------------------------ ipacket = first_zp ;word buffer = first_zp+2 ;word ProDOS_enter !set CloseHandles = @imp_close !set swap_zpg = @swap_zp !set SavedZP = @saved_zp stx ProDOS_savedX+1 sty ProDOS_savedY+1 jsr @swap_zp pla tay pla sta @fetchaddr+1 pla sta @fetchaddr+2 jsr @fetchbyte sta @request+1 jsr @fetchbyte sta ipacket jsr @fetchbyte sta ipacket+1 lda @fetchaddr+2 pha lda @fetchaddr+1 pha tya pha ldy #2 @request lda #$d1 cmp #$40 beq @imp_allocint ;;@do_allocint cmp #$41 beq @do_deallocint cmp #$65 beq @do_quit cmp #$80 beq @imp_rdwrblock ;;@do_readblock cmp #$81 beq @imp_rdwrblock ;;@do_writeblock cmp #$c0 beq @do_create cmp #$c4 beq @imp_getattrib ;;@do_getattrib cmp #$c6 beq @do_setprefix cmp #$c7 beq @do_getprefix cmp #$c8 beq @do_open cmp #$ca beq @do_read cmp #$cb beq @do_write cmp #$cc beq @do_close cmp #$ce beq @do_seek cmp #$d0 beq @do_seteof ;; cmp #$d1 ;; bne @do_fatal @do_geteof jmp @imp_geteof @do_allocint ;; jmp @imp_allocint @do_quit jmp $100 @do_readblock @do_writeblock ;; jmp @imp_rdwrblock @do_getattrib ;; jmp @imp_getattrib @do_getprefix jmp @imp_getprefix @do_open jmp @imp_open @do_read jmp @imp_read @do_write jmp @imp_write @do_close jsr @imp_close ;subroutine special case because of dual-use @do_deallocint ;nothing for now @do_create ;nothing for now @do_setprefix ;nothing for now @do_seteof ;nothing for now jmp @restore_zp @do_seek jmp @imp_seek @do_fatal ;; jmp ProDOS_fatal @imp_allocint ;;ldy #2 lda (ipacket), y sta ProDOS_irq + 1 iny lda (ipacket), y sta ProDOS_irq + 2 lda #ProDOS_int sta $3fe sta $fffe stx $3ff stx $ffff bne @jmp_zp2 ;always @imp_rdwrblock and #$7f adc #0 sta @rdwrop+1 ldx #$44 ;;ldy #2 jsr @setbuffer lda (ipacket), y tax iny lda (ipacket), y @rdwrop ldy #$d1 ; SMC jsr hddseekrd+2 bcc @jmp_zp2 ;always @imp_getattrib lda ipacket+1 pha lda ipacket pha ldx #namlo jsr @setbuffer1 lda #$60 sta attribpatch jsr hddopendir lda #$10 sta attribpatch pla sta ipacket pla sta ipacket+1 ldy #5 lda ldrlo2 sta (ipacket), y iny lda ldrlo2+1 sta (ipacket), y ldy #$13 jsr fetchscratch ldy #9 sta (ipacket), y txa dey sta (ipacket), y @jmp_zp2 jmp @restore_zp @imp_getprefix ldx #buffer jsr @setbuffer1 ldy ProDOS_prefix iny iny tya pha @copy_prefix lda ProDOS_prefix-1, y sta (buffer), y dey bne @copy_prefix pla sta (buffer), y tay lda #'/' sta (buffer), y ldy #1 sta (buffer), y bne @jmp_zp2 ;always @imp_open ldx #namlo jsr @setbuffer1 inc @handles+1 @handles ldx #0 iny lda (ipacket), y sta @handle-1, x jsr @patch_buffer iny lda #1 sta (ipacket), y lsr sta reqcmd sta sizehi sta sizelo jsr hddopendir stx blkidx beq @link_jmpzp ;always resetval=$f0 @imp_seek jsr @set_rdwrbuff ldx #0 stx blkidx stx treeidx stx blkofflo stx blkoffhi stx reqcmd ldy sizelo beq @testzero @seekloop jsr @reset ldy sizelo bne @seek64 cmp ldrhi bcc @seek64 bne @seek32 cpx ldrlo bne @seek64 @seek32 lda ldrhi ldx ldrlo @seek64 sta sizehi stx sizelo lda ldrhi pha lda sizehi pha lda ldrlo pha txa pha tya pha jsr @seekreset pla tay sec pla sta ldrlo pla sbc ldrlo sta ldrlo pla sta ldrhi pla sbc ldrhi sta ldrhi @testzero tya sbc #0 sta sizelo ora ldrlo ora ldrhi bne @seekloop @link_jmpzp jmp @jmp_zp @seekreset jsr hddrdwrpart @reset lda #resetval sta blefthi stx bleftlo rts @imp_read clc @imp_write php lda #cmdread adc #0 sta reqcmd jsr @set_rdwrbuff plp bcc @skip_align ldx #sizelo jsr @round lda #0 sta sizelo ldx #bleftlo jsr @round @skip_align jsr hddrdwrpart ldx #hddencbuf @patch_buffer sta encbufpatch1+1 sta encbufpatch2+1 tax inx stx dirbufpatch1+1 inx stx dirbufpatch2+2 stx dirbufpatch3+2 stx dirbufpatch4+2 stx dirbufpatch6+1 stx dirbufpatch7+2 stx dirbufpatch9+2 stx dirbufpatch10+1 stx dirbufpatch11+1 stx dirbufpatch12+1 stx dirbufpatch13+2 inx stx dirbufpatch5+2 stx dirbufpatch8+2 stx dirbufpatch14+2 @close_ret rts @fetchbyte inc @fetchaddr+1 bne @fetchaddr inc @fetchaddr+2 @fetchaddr lda $d1d1 rts @set_rdwrbuff ldy #1 lda (ipacket), y tax lda @handle-1, x jsr @patch_buffer ldx #ldrlo iny jsr @setbuffer ldx #sizelo !byte $2c @setbuffer1 ldy #1 @setbuffer lda (ipacket), y sta $0,x iny lda (ipacket), y sta $1,x iny rts @round clc lda $0,x adc #$ff lda $1,x adc #1 and #$fe sta $1,x rts @swap_zp ldx #last_zp-first_zp @save_zp lda first_zp,x ldy @saved_zp,x sta @saved_zp,x sty first_zp,x dex bpl @save_zp rts @restore_zp jsr @swap_zp jmp ProDOS_exit @handle !byte 0, 0 ;only up to two handles at a time @saved_zp !fill (last_zp - first_zp) + 1 resetRoot gRootDirectory +LDADDR 0 ; SMC sta (reloc + unrhddblocklo - unrelochdd) + 1 sty (reloc + unrhddblockhi - unrelochdd) + 1 rts ;------------------------------------------------------------------------------ ; traverse [private] ; ; in: (namlo) points to length-prefixed pathname+filename ; out: all flags clobbered ; all registers clobbered ;------------------------------------------------------------------------------ !ifdef PASS2 { } else { ;PASS2 !if * != itraverse { !error "itraverse=",*, ", fix constants.a, rebuild prelaunch" } } traverse jsr resetRoot ;search for '/' character in filename ldx #0 ldy #0 lda (namlo), y tay - inx dey bmi @go ; no '/', just do the read lda (namlo), y cmp #'/' bne - sty sizelo txa pha lda #$B1 ; LDA (), y sta pathpatch1 lda #$68 ; PLA sta pathpatch2 lda #$60 ; RTS sta pathpatch2 + 1 @myreadblock jsr hddopendir - tax ;parse path until last directory is seen lda (namlo), y cmp #'/' beq + -- jsr pathresume bne - ; always taken + txa bmi -- tya eor #$ff adc sizelo sta sizelo clc tya adc namlo sta namlo bcc + inc namhi + ;cache block number of current directory ;as starting position for subsequent searches ldy #(KEY_POINTER + 1) lda (scratchlo), y tax dey lda (scratchlo), y sta (reloc + unrhddblocklo - unrelochdd) + 1 stx (reloc + unrhddblockhi - unrelochdd) + 1 lda sizelo bne @myreadblock tay lda #$D1 ; CMP (), y sta pathpatch1 lda #$86 ; STX sta pathpatch2 lda #$5A sta pathpatch2 + 1 pla sta (namlo), y @go rts ;------------------------------------------------------------------------------ ; promote [private] ; ; tiny ProDOS-style interface for ProRWTS ; in: whatever ProDOS expects for the supported functions ; out: carry clear, A=0 ; X, Y, and other flags clobbered ;------------------------------------------------------------------------------ promote !pseudopc $bf00 { php sei bit $c083 !byte $24 !if * != $bf06 { !error "$BF06 misplaced (",*,")" } rts ;clock interface, must be RTS on real ProDOS if program uses $20x bit $c083 jmp ProDOS_enter ProDOS_exit sta $c082 bmi ProDOS_savedX ;always !if * != $bf12 { !error "$BF12 misplaced (",*,")" } !word $c1d1, $c2d1, $c3d1, $c4d1, $c5d1, $c6d1, $c7d1 ProDOS_savedX ldx #$d1 ProDOS_savedY ldy #$d1 plp clc lda #0 rts !if * > $bf30 { !error "$BF30 misplaced (",*,")" } else { !if * != $bf30 { !fill $bf30-* } } ProDOS_unit !byte $d1 ProDOS_int pha txa pha tya pha ProDOS_irq jsr $d1d1 ;SMC pla tay pla tax pla bit $c012 bmi + lda $45 + rti !if * > $bf58 { !error "code is too large, ends at ", * } ProDOS_fatal ;only for debugging, will be removed ;; bit $c081 ;; pha ;; jsr $fe89 ;; jsr $fe93 ;; pla ;; jsr $fdda ;; jmp $ff65 ;;*=$bf58 ;; !fill $18 ;filled by init instead ProDOS_prefix=gPathname ; !fill $2e } end_promote