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Debug of CCP parsing routines
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Bobbi Webber-Manners
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commit
20e655d617
@ -1531,26 +1531,26 @@ F2PS6 LD A,C ; Store length of string
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; B contains the drive number (1 for A:, 2 for B: etc)
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; The FCB is written to the buffer pointed to by DMAADDR
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; Trashes pretty much all registers (except IX, IY)
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PATH2FCB EX DE,HL ; Stash HL in DE so we can use HL here
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NAME2FCB EX DE,HL ; Stash HL in DE so we can use HL here
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LD HL,(DMAADDR) ; Set all 32 bytes to FCB to zero
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LD C,0 ; ...
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XOR A ; ...
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P2FL1 LD (HL),C ; ...
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N2FL1 LD (HL),C ; ...
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INC HL ; ...
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INC A ; ...
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CP 32 ; ...
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JP NZ,P2FL1 ; ...
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JP NZ,N2FL1 ; ...
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LD HL,(DMAADDR) ; Set all filename chars in FCB to space
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INC HL ; ...
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LD C,' ' ; ...
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XOR A ; ...
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P2FL2 LD (HL),C ; ...
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N2FL2 LD (HL),C ; ...
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INC HL ; ...
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INC A ; ...
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CP 8+3 ; ...
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JP NZ,P2FL2 ; ...
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JP NZ,N2FL2 ; ...
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EX DE,HL ; Get file entry pointer back in HL
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@ -1561,24 +1561,26 @@ P2FL2 LD (HL),C ; ...
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LD A,B ; Move drive number to A
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LD (DE),A ; Write drive number
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LD B,0 ; Use B to count chars written
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P2FL3 INC HL ; Advance source pointer
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N2FL3 INC HL ; Advance source pointer
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INC DE ; Advance destination pointer
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LD A,C ; Get count of chars remaining
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CP 0 ; If none left ...
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JP Z,P2FS3 ; We are done
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JP Z,N2FS3 ; We are done
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LD A,B ; Get count of chars written
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CP 8+3 ; If 8+3 chars have been written ...
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JP Z,P2FS3 ; We are done
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JP Z,N2FS3 ; We are done
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LD A,(HL) ; Read character
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CP '.' ; See if it is a period
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JP Z,P2FS2 ; Prepare to copy the extension
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JP Z,N2FS2 ; Prepare to copy the extension
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CP ' ' ; See if it is a space ** NEED THIS? **
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JP Z,N2FS3 ; If so, we are done ** NEED THIS? **
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LD (DE),A ; Write character
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INC B ; Increment count of chars written
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P2FS1 DEC C ; Decrement count of chars remaining
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JP P2FL3 ; Loop
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N2FS1 DEC C ; Decrement count of chars remaining
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JP N2FL3 ; Loop
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; Initialize DE, B to start processing the extension
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P2FS2 LD DE,(DMAADDR) ; Destination is start of extension
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N2FS2 LD DE,(DMAADDR) ; Destination is start of extension
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INC DE ;
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INC DE ;
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INC DE ;
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@ -1588,16 +1590,16 @@ P2FS2 LD DE,(DMAADDR) ; Destination is start of extension
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INC DE ;
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INC DE ;
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LD B,8 ; 8 chars have been written
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JP P2FS1 ; Jump back into the read-write loop
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JP N2FS1 ; Jump back into the read-write loop
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; Handle file size info
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P2FS3 LD DE,(DMAADDR) ; Pointer to start of FCB
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N2FS3 LD DE,(DMAADDR) ; Pointer to start of FCB
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LD IX,PATHBUF ; Destination buffer
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CALL FCB2PATH ; Populate PATHLEN and PATH from new FCB
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LD HL,GFIMLI ; Pass address of 6502 JSR instruction
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CALL PRODOS ; Invoke ProDOS MLI
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CP 0 ; See if there was an error
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JP NZ,P2FERR ; Handle error
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JP NZ,N2FERR ; Handle error
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LD HL,(GFIMLIBU) ; Obtain the blocks used field
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ADD HL,HL ; Mult x 4 to get 128 byte records
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ADD HL,HL ; ...
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@ -1608,7 +1610,7 @@ P2FS3 LD DE,(DMAADDR) ; Pointer to start of FCB
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LD (IX+0CH),B ; Store num extents in EX field of FCB
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LD (IX+0FH),A ; Store num recs in RC field of FCB
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RET
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P2FERR LD DE,(DMAADDR) ; Pointer to start of FCB
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N2FERR LD DE,(DMAADDR) ; Pointer to start of FCB
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PUSH DE ; Copy into IX
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POP IX ; ...
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LD A,0 ; If error, set num extents to zero
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@ -1665,7 +1667,7 @@ RDBS2 POP HL ; Reset DMA address as we found it
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; Match FCBs
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; Used by CHKDIRENT
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; DE is the address of the FCB describing the file to look for
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; Compare with FCB at DMAADDR already created by PATH2FCB
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; Compare with FCB at DMAADDR already created by NAME2FCB
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; Returns A=0 if entry matches, A=FFH if no match
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; Trashes A,BC,DE,HL
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MATCHFCB INC DE ; Skip over drive byte in FCB
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@ -1703,7 +1705,7 @@ CHKDIRENT LD B,0 ; Hardcode drive A: MATCHFCB ignores it
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JP Z,CDES1 ; File is deleted - no match
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PUSH HL ; Preserve HL
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PUSH DE ; Preserve DE
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CALL PATH2FCB ; Create FCB in DMA buffer
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CALL NAME2FCB ; Create FCB in DMA buffer
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POP DE ; Recover DE
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POP HL
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PUSH HL
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@ -1888,7 +1890,6 @@ N2H2 OR 0F0H ;
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; - FILENAME.COM - Load and run FILENAME.COM at 0100H
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; TODO: Upper-case all characters from console!!
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; TODO: Implement the built-in commands using a table
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; TODO: Built-in commands argument handling
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; TODO: Parse * wildcard and generate FCB with ?s
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@ -1955,7 +1956,7 @@ CCPS2 LD HL,FCB1 ; Set DMAADDR to point to FCB1
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JP NZ,CCPS3 ; If not then skip to default drive
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LD A,(FILEBUF+2) ; Get the drive letter
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SUB 'A'-1 ; Convert to 1-based drive number
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LD B,A ; In B for PATH2FCB
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LD B,A ; In B for NAME2FCB
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LD A,(HL) ; Get the string length
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SUB 2 ; Eat drive letter and colon
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INC HL ; ...
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@ -1967,22 +1968,21 @@ CCPS3 LD A,(CURDRV) ; Get drive and user number
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INC A ; FCB drive numbers are 1-based
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LD B,A ; Always use default drive
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CCPS4
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CALL PATH2FCB ; Create FCB at FCB1
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; TODO: Shouldn't use FCB1 for this!
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CALL NAME2FCB ; Create FCB at FCB1
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LD A,'C' ; Set extension to .COM, in case not typed
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LD (FCB1NAM+8),A ;
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LD A,'O' ;
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LD (FCB1NAM+9),A ;
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LD A,'M' ;
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LD (FCB1NAM+10),A ;
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LD DE,FCB1 ; Point to our new FCB
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LD (FCB1NAM+10),A ;
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; This is so commands don't think there are arguments to parse
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LD HL,FILEBUF ; Stuff zero in first char of FILEBUF
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LD A,0 ; ...
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LD (HL),A ; ...
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CALL CMDTAIL ; Process the command tail (ie: arguments)
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LD HL,0080H ; Reset DMAADDR to 0080H
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LD (DMAADDR),HL ; ...
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LD DE,FCB1 ; Point to our new FCB
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LD DE,FCB1 ; Use FCB1
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CALL RUNCOM ; Try to run .COM file
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@ -2005,6 +2005,116 @@ UCL1 LD A,C ; See if any chars are left
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UCS1 LD (HL),A ; Put converted char back
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JP UCL1 ; Loop
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; Handle the command tail
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; Replaces the contents of FILEBUF with command tail as Pascal-style string
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; B is used to keep track of the parser state machine:
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; 0 in whitespace before command
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; 1 in command
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; 2 in whitespace segment following command
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; 3 in first argument
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; 4 in whitespace segment following first argument
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; 5 in second argument
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CMDTAIL LD HL,FILEBUF+1 ; Skip first byte - buffer capacity
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PUSH HL ; HL->IX. Use IX as destination pointer.
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POP IX ; ...
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LD C,(HL) ; Get the length of source string
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LD B,0 ; B is the state of the parser
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LD D,0 ; D is the count of chars output
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CTL1 LD A,C ; See if any chars are left in input
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CP 0 ; ...
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JP Z,CTS2 ; If 0, go update the length byte
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INC HL ; Advance to next char of source string
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DEC C ; Decrement count remaining
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LD A,(HL) ; Get char from buffer
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CP ' ' ; See if it a space
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JP Z,CTS1 ; If space ...
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CALL CMDNSPC ; Handle non-space
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JP CTL1 ; Loop
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CTS1 CALL CMDSPC ; Handle space
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JP CTL1 ; Loop
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CTS2 LD HL,FILEBUF ; First byte is length of string
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LD (HL),D ; Write string length
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RET
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; Handle a space character in the command line
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; State 0: Do not emit space to FILEBUF.
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; State 1: Do not emit space to FILEBUF. -> State 2
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; State 2: Do not emit space to FILEBUF.
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; State 3: Emit space to FILEBUF. -> State 4
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; State 4: Do not emit space to FILEBUF.
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; State 5: Emit space to FILEBUF.
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CMDSPC LD E,A ; Put character in E
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LD A,B ; Get parser state
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CP 0 ; State 0 - eat the space
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JP NZ,CSS1 ;
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RET ;
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CSS1 CP 1 ; State 1 - eat the space
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JP NZ,CSS2 ;
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INC B ; Transition to state 2
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RET ;
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CSS2 CP 2 ; State 2 - eat the space
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JP NZ,CSS3 ;
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RET ;
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CSS3 CP 3 ; State 3
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JP NZ,CSS4 ;
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LD (IX+0H),E ; Just emit the space
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INC IX ; ...
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INC D ; Character count
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INC B ; Transition to state 4
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RET ;
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CSS4 CP 4 ; State 4 - eat the space
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JP NZ,CSS5 ;
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RET ;
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CSS5 CP 5 ; State 5
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JP NZ,CSS6 ;
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LD (IX+0H),E ; Just emit the space
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INC IX ; ...
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INC D ; Character count
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CSS6 RET
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; Handle a non-space character in the command line
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; State 0: Do not emit character to FILEBUF. -> State 1
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; State 1: Do not emit character to FILEBUF.
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; State 2: Emit character to FILEBUF. -> State 3
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; State 3: Emit character to FILEBUF.
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; State 4: Emit character to FILEBUF. -> State 5
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; State 5: Emit character to FILEBUF.
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CMDNSPC LD E,A ; Put character in E
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LD A,B ; Get parser state
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CP 0 ; State 0 - eat the character
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JP NZ,CNS1 ;
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INC B ; Transition to state 1
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RET ;
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CNS1 CP 1 ; State 1 - eat the character
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JP NZ,CNS2 ;
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RET ;
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CNS2 CP 2 ; State 2
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JP NZ,CNS3 ;
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LD (IX+0H),E ; Emit the character
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INC IX ; ...
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INC D ; Character count
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INC B ; Transition to state 3
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RET ;
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CNS3 CP 3 ; State 3
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JP NZ,CNS4 ;
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LD (IX+0H),E ; Emit the character
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INC IX ; ...
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INC D ; Character count
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RET ;
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CNS4 CP 4 ; State 3
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JP NZ,CNS5 ;
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LD (IX+0H),E ; Emit the character
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INC IX ; ...
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INC D ; Character count
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INC B ; Transition to state 5
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RET ;
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CNS5 CP 5 ; State 5
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JP NZ,CNS6 ;
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LD (IX+0H),E ; Emit the character
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INC IX ; ...
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INC D ; Character count
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CNS6 RET
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; Load and run a .COM file to 0100H
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; DE is the address of the FCB describing the file to run
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RUNCOM CALL F_OPEN ;
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BIN
zapple2.po
BIN
zapple2.po
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