mirror of https://github.com/RevCurtisP/C02.git
Minor changes to include/ .a02 files
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Curtis F Kaylor
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5289bb8717
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976dd4cf44
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@ -42,12 +42,12 @@ ISFLS: LDA #$00 ; Return FALSE
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RTS
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;C02/ML Character Conversion Routines
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tolowr: JSR ISUPR ;If Char IS Not Upper Case
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TOLOWR: JSR ISUPR ;If Char IS Not Upper Case
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BCC ISRTS ; Return
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ORA #$20 ;Else Set Bit 5
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RTS ; and Return
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touppr: JSR ISLWR ;If Char IS Not Lower Case
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TOUPPR: JSR ISLWR ;If Char IS Not Lower Case
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BCC ISRTS ; Return
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AND #$DF ;Else Clear Bit 5
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RTS ; and Return
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@ -22,7 +22,6 @@ PTRRTN: LDY (1,X) ;Load Pointer MSB into Y
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LDA TEMP0 ;Load Pointer Addres into A
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RTS
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;ptrset(ptr, &addr) - Store Address in Pointer
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;Args: A = Zero Page Pointer Address
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; X,Y = Address to Store
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@ -8,7 +8,7 @@
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;Uses: System Dependent
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;Affects: System Dependent
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;Returns: A = Character Code of Key
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GETC EQU GETCHR ;Alias to external GETCHRroutine
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GETC EQU GETCHR ;Alias to external GETCHR Routine
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;void putc(c) - PUT Character to screen
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;Args: Character code to display
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@ -16,15 +16,17 @@ GETC EQU GETCHR ;Alias to external GETCHRroutine
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;Uses: System Dependent
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;Affects: System Dependent
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;Returns: System Dependent
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PUTC EQU PUTCHR ;Alias to external PUTCHRRoutine
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PUTC EQU PUTCHR ;Alias to external PUTCHR Routine
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;char gets(&s) - GET String input from keyboard
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;Args: Y,X = Address of String
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;Sets: SRCLO,SRCLHI = Address of String
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;Affects: N,Z,C
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;Uses: TEMP3
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;Affects: X,N,Z,C
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;Returns: A,Y = Number of Characters in String
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GETS: JSR SETSRC ;Initialize Source String
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GETSL: JSR GETC ;Get Keypress
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GETSL: STY TEMP3 ;Save Y Index
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JSR GETC ;Get Keypress
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CMP #DELKEY ;If Delete
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BNE GETSE ;Then
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TYA ; If Offset is Zero
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@ -39,10 +41,12 @@ GETSE: CMP #ESCKEY ;Else If Escape
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GETSC: CMP #RTNKEY ;Else If Not Carriage Return
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BEQ GETSX
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JSR PUTC ; Echo Character
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LDY TEMP3 ;Restore Y Index
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STA (SRCLO),Y ; Store Character at offset
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INY ; increment offset and
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BPL GETSL ; loop if less than 128
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GETSX: JSR NEWLIN ;Else Advance Cursor to Next Line
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LDY TEMP3 ;Restore Y Index
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LDA #$00 ; Terminate String
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STA (SRCLO),Y ; and
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GETSY: TYA ; Return String Length
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@ -1,6 +1,6 @@
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; C02 library stdlib.h02 assembly language subroutines
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; Requires
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; external zero page locations SRCLO and srchi
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; external zero page locations SRCLO and SRCHI
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; and external locations RANDOM, RDSEED, TEMP0, TEMP1, and TEMP2.
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;abs(n) - Get ABSolute Value
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@ -29,16 +29,16 @@ STRCMR: RTS ;
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;Args: A = Character to look for
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; X,Y = Pointer to string to search in
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;Sets: SRCLO,SRCHI = Pointer to string
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; TEMP0 = Character being searched for
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; TEMP3 = Character being searched for
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;Affects: N,Z
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;Returns: A = Position in string, C=1 if found
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; A = $FF, C=0 if not found
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; Y = Position of last character scanned
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STRCHR: JSR SETSRC ;Initialize Source String
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STRCHA: STA TEMP0; ;Save Search Character (alternate entry point)
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STRCHA: STA TEMP3; ;Save Search Character (alternate entry point)
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STRCHL: LDA (SRCLO),Y ;Get Next Character
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BEQ STRCLC ;If NUL, Return $FF and Carry Clear
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CMP TEMP0 ;Compare Character
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CMP TEMP3 ;Compare Character
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BEQ STRLEX ;If Found, Return Index
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INY ;Increment Counter and Loop if < 128
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BPL STRCHL ;Else Return $FF and Carry Clear
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@ -71,7 +71,7 @@ STRDST EQU SETDST ;Aliased to System Header function
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;Requires: DSTLO, DSTHI - Pointer to destination string
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;Args: X,Y = Pointer to source string
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;Sets: SRCLO,SRCHI = Pointer to source string
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; TEMP0 = Length of source prior to concatenation
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; TEMP3 = Length of source prior to concatenation
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;Affects: C,N,Z
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;Returns: A,Y = Total length of concatenated string
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STRCAT: JSR SETSRC ;Initialize Source String
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@ -79,10 +79,10 @@ STRCAL: LDA (DSTLO),Y ;Find end of Destination String
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BEQ STRCAX ;
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INY ;
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BPL STRCAL ;
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STRCAX: STY TEMP0 ;Subtract Destination String Length
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STRCAX: STY TEMP3 ;Subtract Destination String Length
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LDA SRCLO ; from Source String Pointer
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SEC
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SBC TEMP0
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SBC TEMP3
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STA SRCLO
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LDA SRCHI
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SBC #$00
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@ -125,13 +125,13 @@ STRCUT: JSR SETSRC ;Initialize Source String
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;Sets: DSTLO,DSTHI = Pointer to position in source string
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; End of string if not found
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; SRCLO,SRCHI = Pointer to source string
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; TEMP0 = Last position checked in destination string
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; TEMP3 = Last position checked in destination string
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;Affects: N,Z
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;Returns: A = Position, C=1 if found
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; A = $FF, C=0 if not found
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; Y = Last position checked in source string
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STRSTR: JSR SETSRC ;Initialize Source String
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STY TEMP0 ;Initialize Position
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STY TEMP3 ;Initialize Position
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STRSTL: LDY #$00; ;Initialize Compare Offset
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LDA (DSTLO),Y ;Get Start Character in Destination
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BEQ STRCLC ;If NUL return $FF and Carry Clear
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@ -140,7 +140,7 @@ STRSTL: LDY #$00; ;Initialize Compare Offset
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BMI STRSTN ; If Source is Greater
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LDA (SRCLO),Y ; If at End of Source String
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BEQ STRSTX ; Return Current Position
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STRSTN: INC TEMP0 ; Else Increment Position
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STRSTN: INC TEMP3 ; Else Increment Position
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BMI STRCLC ; If > 127 return $FF and Carry Clear
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INC DSTLO ; Increment Source Pointer
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BNE STRSTL
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@ -148,30 +148,29 @@ STRSTN: INC TEMP0 ; Else Increment Position
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BNE STRSTL ; Loop
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BEQ STRCLC ; Else return $FF and Carry Clear
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STRSTX: SEC ;Else Set Carry
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LDA TEMP0 ; Load Position
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LDA TEMP3 ; Load Position
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RTS ; and Return
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;strrch(c, &s) - Find Last Occurance Character in String
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;Args: A = Character to look for
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; X,Y = Pointer to string to search in
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;Sets: SRCLO,SRCHI = Pointer to string
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; TEMP0 = Character being searched for
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; TEMP1 = Position of character
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; TEMP3 = Character being searched for
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;Affects: Y,C,N,Z
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;Returns: A = Position of last occurance in string
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; A = $FF if not found
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; Y = Position of last character scanned
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;Returns: A,X = Position of last occurance in string
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; $FF if not found
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; Y = Length of String
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STRRCH: JSR SETSRC ;Initialize Source String
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STA TEMP0; ;Save Search Character (alternate entry point)
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LDA #$FF ;Initialize Position
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STA TEMP1 ; to 255
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STA TEMP3; ;Save Search Character (alternate entry point)
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LDX #$FF ;Initialize Position
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STRRCL: LDA (SRCLO),Y ;Get Next Character
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BEQ STRRCX ;If NUL, Exit with Position
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CMP TEMP0 ;Compare Character
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CMP TEMP3 ;Compare Character
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BNE STRRCS ;If Found
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STY TEMP1 ; Store Counter
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TYA ; Store Counter
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TAX
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STRRCS: INY ;Increment Counter
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BPL STRRCL ; and Loop if < 128
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STRRCX: LDA TEMP1 ;Load Position Accumulater
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STRRCX: TXA ;Copy Position to Accumulater
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RTS ; and Return
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