A2osX/ProDOS.FX/ProDOS.S.ILDR.txt

NEW
  AUTO 3,1
*--------------------------------------
ILDR.START		jsr MLI	  				check for file 'atinit'
				.DA #MLIGETFILEINFO
				.DA ILDR.GFINFO
				bcs ILDR.ENUMPM

				lda ILDR.GFINFO+S.FI.T
				cmp #$E2				is 'atinit' correct file type?
				bne ILDR.ENUMPM			error - wrong file type

				ldy #ILDR.ATINIT
				lda /ILDR.ATINIT
				jsr ILDR.LoadFile
				bcc .1

.9				jmp ILDR.MLIERR

.1				lda RROMBNK2			enable ROM
				jsr sysentry			execute ATinit
*--------------------------------------
				.DO READCAT=1
				
				lda LDR.MLIOL.P+1		Boot unitnum
				sta ILDR.MLIRB.P+1

				stz dst
				lda /dbuf
				ldy #$02	  			read directory into buffer
				ldx #0

.2  			sta dst+1
				sta ILDR.MLIRB.P+3		Data buf HI
				sty ILDR.MLIRB.P+4		Blk Num LO
				stx ILDR.MLIRB.P+5		Blk Num HI

				jsr MLI
				.DA #MLIREADBLOCK
				.DA ILDR.MLIRB.P
				bcs .9

				ldy #$03				get next block# from link
				lda (dst),y
				tax
				dey
				ora (dst),y				00 00 -> Last Block
				beq .8

				lda (dst),y
				tay
				lda dst+1
				inc
				inc						add $200 to buffer pointer
				cmp /dbuf+$800	  		until it points past end of buffer.
				bcc .2					if ok, read next block.

.8				.FIN
*--------------------------------------
* BOOT block read 4 directory blocks at dbuf=$C00 -> $13FF
*--------------------------------------
ILDR.ENUMPM		.DO PM

				jsr ILDR.EnumInit

.1				ldx #S.FI.T.BIN
				ldy #ILDR.KMPFX
				lda /ILDR.KMPFX
				clc						prefix
				jsr ILDR.EnumNext
				bcs .4

				jsr ILDR.LoadFilePBuf
				bcs ILDR.MLIERR

				ldx #3
				
.2				lda idxl,x
				pha
				dex
				bpl .2

				jsr sysentry

				bit RROMBNK2			enable ROM
				
				ldx #0
				
.3				pla
				sta idxl,x
				inx
				cpx #4
				bne .3
				
			>DEBUGOA

				bra .1

				.FIN
*--------------------------------------
.4				jsr ILDR.EnumInit
				
				ldx #S.FI.T.SYS
				ldy #ILDR.SYSTEMSFX
				lda /ILDR.SYSTEMSFX
				sec						suffix
				jsr ILDR.EnumNext
				bcs .9

				jsr ILDR.LoadFilePBuf
				bcs ILDR.MLIERR

				bit RROMBNK2			enable ROM

				bit RDIOUDIS
				sta SETIOUDIS
				sta CLRDHIRES
				bmi .5

				sta CLRIOUDIS

.5				sta CLR80DISP
				sta	CLR80STORE
				sta SETTEXT
				sta CLRMIXED
				jsr init
				jsr setvid
				jsr setkbd
				jsr home
				jmp sysentry			go run interpreter

.9				jsr MLI	  				no .SYSTEM found, so quit.
				.DA #MLIQUIT
				.DA ILDR.QUIT
*--------------------------------------
ILDR.MLIERR		cmp #MLI.E.BADBUF
				bne .1

				ldx #ILDR.MSG.SYSTOOLARG-ILDR.MSG

				.HS 2C					BIT ABS
.1				ldx #ILDR.MSG.SYSLOADERR-ILDR.MSG

				bit RROMBNK2
				jsr SETINV

.2				lda ILDR.MSG,x
				pha
				ora #$80
				jsr COUT
				inx
				pla
				bpl .2

				lda #$A0
				jsr COUT

				ldy #0

.3				iny
				lda pbuf,y
				jsr COUT
				cpy pbuf
				bne .3

				bra *
*--------------------------------------
ILDR.EnumInit	lda /dbuf				search directory buffer
				sta idxl+1
				lda #dbuf+4				skip Prev/next Block Ptr
				sta idxl

				lda dbuf+35	  			EL
				sta ILDR.EL

				lda dbuf+36	  			EPB
				sta ILDR.EPB
				sta ILDR.EITB

				lda dbuf+37	  			FCLO
				eor #$ff
				sta ILDR.nFC

				lda dbuf+38	  			FCHI
				eor #$ff
				sta ILDR.nFC+1

ILDR.EnumInit.RTS
				rts
*--------------------------------------
* X = expected FileType
* Y,A = expected prefix/suffix
*--------------------------------------
ILDR.EnumNext	stx ILDR.FT
				sty src
				sta src+1
				
				ror ILDR.bPFXSFX

.1				inc ILDR.nFC
				bne .2

				inc ILDR.nFC+1
				sec
				beq ILDR.EnumInit.RTS

.2				dec	ILDR.EITB
				beq .3

				lda idxl
				clc
				adc ILDR.EL
				sta idxl
				bcc .4					same page

				inc idxl+1				512b block, 2nd page
				bra .4

.3				inc idxl+1
				lda idxl+1
				cmp #$14				last block read at $0C00-$13FF
				bcs ILDR.EnumInit.RTS
				
				lda #4
				sta idxl

				lda ILDR.EPB
				sta ILDR.EITB

.4				lda (idxl)
				beq .2					deleted / empty

				bmi .1					$D, $E, or $F...

				and #$0F
				sta pbuf				filename Len

				tay

.5				lda (idxl),y
				sta pbuf,y
				dey
				bne .5

				ldy #16
				lda (idxl),y

				cmp ILDR.FT				expected file type
				bne .1

				lda (src)				expected prefix/suffix len
				cmp pbuf
				bcs .1					filename LE prefix/suffix

				bit ILDR.bPFXSFX
				bpl .12					go check prefix

				tay
				ldx pbuf

.11				lda pbuf,x
				eor (src),y
				asl
				bne .1

				dex
				dey
				bne .11
				bra .15
				
.12				lda (src)				expected prefix/suffix len
				tay

.13				lda pbuf,y
				eor (src),y
				asl
				bne .1

				dey
				bne .13
				
.15				ldy #$1D				MIN_VERSION
				lda (idxl),y
				bpl .10					no lowercase information
				
				ldx pbuf

.6				cpx #8					CS if MIN_VERSION to use
				bcs .7

				ldy #$1D				MIN_VERSION
				lda (idxl),y
				and ILDR.LCBits,x
				bne .8
				
				bra .9
				
.7				ldy #$1C				VERSION
				lda (idxl),y
				
				and ILDR.LCBits-8,x
				beq .9

.8				lda pbuf,x
				eor #$20				to lowercase
				sta pbuf,x
				
.9				dex
				bne .6
				
.10				clc
				rts
*--------------------------------------
ILDR.LoadFilePBuf
				ldy #pbuf
				lda /pbuf

ILDR.LoadFile	sty ILDR.OPEN+1		Filename
				sta ILDR.OPEN+2

				jsr MLI
				.DA #MLIOPEN
				.DA ILDR.OPEN
				bcs .9

				jsr MLI
				.DA #MLIGETEOF
				.DA ILDR.GETEOF
				bcs .9

				lda ILDR.GETEOF+4
				bne .99

				lda ILDR.GETEOF+3
				cmp #$9F
				bcc .1

				bne .99					more than $9Fxx

				lda ILDR.GETEOF+2
				bne .99					more than $9F00

.1				jsr MLI
				.DA #MLIREAD
				.DA ILDR.READ
				bcs .9

				jsr MLI
				.DA #MLICLOSE
				.DA ILDR.CLOSE

.9				rts

.99				lda #MLI.E.BADBUF
				sec
				rts
*--------------------------------------
ILDR.MSG		.EQ *
ILDR.MSG.SYSLOADERR	.AT "Unable to load"
ILDR.MSG.SYSTOOLARG	.AT "Too Large"
ILDR.LCBits		.HS 8040201008040201
*--------------------------------------
ILDR.GFINFO		.DA #10					PARAM CNT
				.DA ILDR.ATINIT
				.BS	S.FI-3
*--------------------------------------
				.DO READCAT=1
ILDR.MLIRB.P	.DA #3
				.DA #0	  				unit number
				.DA 0					2 byte data buffer
				.DA 0		 			2 byte block number
				.FIN
*--------------------------------------
ILDR.OPEN		.DA #3					PARAM CNT
				.BS 2					Filename
				.DA iobuf				i/o buffer
				.HS 01					REF
*--------------------------------------
ILDR.GETEOF		.DA #2					PARAM CNT
				.DA #01					REF
				.HS 000000
*--------------------------------------
ILDR.READ		.DA #4					PARAM CNT
				.HS 01					REF
				.DA sysentry
				.DA $9F00				Max file size
				.HS 0000
*--------------------------------------
ILDR.CLOSE		.DA #1					PARAM CNT
				.HS 01					REF
*--------------------------------------
ILDR.QUIT		.DA #4					PARAM CNT
				.HS 00
				.HS 0000
				.HS 00
				.HS 0000
*--------------------------------------
ILDR.ATINIT		.DA #6
				.AS "ATINIT"
ILDR.KMPFX		.DA #3
				.AS "PM."
ILDR.SYSTEMSFX	.DA #7
				.AS ".SYSTEM"
*--------------------------------------
ILDR.LEN		.EQ *-ILDR.START
*--------------------------------------
				.DUMMY
ILDR.EPB		.BS 1
ILDR.EL			.BS 1
ILDR.nFC		.BS 2
ILDR.FT			.BS 1
ILDR.EITB		.BS 1
ILDR.bPFXSFX	.BS 1
				.ED
*--------------------------------------
MAN
SAVE usr/src/prodos.fx/prodos.s.ildr
LOAD usr/src/prodos.fx/prodos.s
ASM