mirror of
https://github.com/RevCurtisP/C02.git
synced 2024-11-24 15:31:17 +00:00
147 lines
4.5 KiB
NASM
147 lines
4.5 KiB
NASM
|
PROCESSOR 6502
|
||
|
|
ORG $0200
|
||
|
|
; ctype.h02 assembly language subroutines
|
||
|
|
;
|
||
|
|
|
||
|
|
|
||
|
|
isalnm: LDX #0 ;ALNUM
|
||
|
|
BPL ctype
|
||
|
|
isalph: LDX #1 ;ALPHA
|
||
|
|
BPL ctype
|
||
|
|
isctrl: LDX #2 ;CNTRL
|
||
|
|
BPL ctype
|
||
|
|
isdigt: LDX #3 ;DIGIT
|
||
|
|
BPL ctype
|
||
|
|
isgrph: LDX #4 ;GRAPH
|
||
|
|
BPL ctype
|
||
|
|
islowr: LDX #5 ;LOWER
|
||
|
|
BPL ctype
|
||
|
|
isprnt: LDX #6 ;PRINT
|
||
|
|
BPL ctype
|
||
|
|
ispnct: LDX #7 ;PUNCT
|
||
|
|
BPL ctype
|
||
|
|
isspce: LDX #8 ;SPACE
|
||
|
|
BPL ctype
|
||
|
|
isuppr: LDX #9 ;UPPER
|
||
|
|
BPL ctype
|
||
|
|
isxdgt: LDX #10 ;HXDGT
|
||
|
|
|
||
|
|
ctype: TAY ;Save Character
|
||
|
|
AND #$80 ;If High Bit Set
|
||
|
|
BNE cflse ; Return False
|
||
|
|
LDA cchar,Y ;Get Character Bit Mask
|
||
|
|
AND cmask,X ;If it Matches Test Bit Mask
|
||
|
|
BNE ctrue ; Return True
|
||
|
|
|
||
|
|
cflse: LDA #0 ;Return False
|
||
|
|
RTS
|
||
|
|
|
||
|
|
ctrue: LDA #$FF ;Return True
|
||
|
|
RTS
|
||
|
|
|
||
|
|
;Informational Only
|
||
|
|
;CNTRL EQU %00000001 ;Control Character
|
||
|
|
;SPACE EQU %00000010 ;White Space
|
||
|
|
;BLANK EQU %00000100 ;Blank
|
||
|
|
;PUNCT EQU %00001000 ;Punctuation
|
||
|
|
;DIGIT EQU %00010000 ;Decimal Digit
|
||
|
|
;HEXDC EQU %00100000 ;Hexadecimal Digit
|
||
|
|
;UPPER EQU %01000000 ;Upper Case
|
||
|
|
;LOWER EQU %10000000 ;Lower Case
|
||
|
|
|
||
|
|
;Character Test Bit Masks
|
||
|
|
cmask: DB %11010000 ;ALNUM = DIGIT + UPPER + LOWER
|
||
|
|
DB %11000000 ;ALPHA = UPPER + LOWER
|
||
|
|
DB %00000001 ;CNRTL
|
||
|
|
DB %00010000 ;DIGIT
|
||
|
|
DB %11011000 ;GRAPH = PUNCT + DIGIT + UPPER + LOWER
|
||
|
|
DB %10000000 ;LOWER
|
||
|
|
DB %11011100 ;PRINT = BLANK + PUNCT + DIGIT + UPPER + LOWER
|
||
|
|
DB %00001000 ;PUNCT
|
||
|
|
DB %00000010 ;SPACE
|
||
|
|
DB %01000000 ;UPPER
|
||
|
|
DB %00110000 ;HXDGT = DIGIT + HEXDC
|
||
|
|
|
||
|
|
;Character Set Bit Masks
|
||
|
|
cchar: DB %00000001 ;00 NUL CNTRL
|
||
|
|
DB %00000001 ;01 SOH CNTRL
|
||
|
|
DB %00000001 ;02 STX CNTRL
|
||
|
|
DB %00000001 ;03 ETX CNTRL
|
||
|
|
DB %00000001 ;04 EOT CNTRL
|
||
|
|
DB %00000001 ;05 ENQ CNTRL
|
||
|
|
DB %00000001 ;06 ACK CNTRL
|
||
|
|
DB %00000001 ;07 BEL CNTRL
|
||
|
|
DB %00000001 ;08 BS CNTRL
|
||
|
|
DB %00000011 ;09 HT CNRTL + SPACE
|
||
|
|
DB %00000011 ;0A LF CNRTL + SPACE
|
||
|
|
DB %00000011 ;0B VT CNRTL + SPACE
|
||
|
|
DB %00000011 ;0C FF CNRTL + SPACE
|
||
|
|
DB %00000011 ;0D CR CNRTL + SPACE
|
||
|
|
DB %00000001 ;0E SS CNRTL
|
||
|
|
DB %00000001 ;0F SI CNRTL
|
||
|
|
DB %00000001 ;10 DLE CNRTL
|
||
|
|
DB %00000001 ;11 DC1 CNRTL
|
||
|
|
DB %00000001 ;12 DC2 CNRTL
|
||
|
|
DB %00000001 ;13 DC3 CNRTL
|
||
|
|
DB %00000001 ;14 DC4 CNRTL
|
||
|
|
DB %00000001 ;15 NAK CNRTL
|
||
|
|
DB %00000001 ;16 SYN CNRTL
|
||
|
|
DB %00000001 ;17 ETB CNRTL
|
||
|
|
DB %00000001 ;18 CAN CNRTL
|
||
|
|
DB %00000001 ;19 EM CNRTL
|
||
|
|
DB %00000001 ;1A SUB CNRTL
|
||
|
|
DB %00000001 ;1B ESC CNRTL
|
||
|
|
DB %00000001 ;1C FS CNRTL
|
||
|
|
DB %00000001 ;1D GS CNRTL
|
||
|
|
DB %00000001 ;1E RS CNRTL
|
||
|
|
DB %00000001 ;1F US CNRTL
|
||
|
|
DB %00000110 ;20 SPC SPACE + BLANK
|
||
|
|
DB %00001000 ;21 ! PUNCT
|
||
|
|
DB %00001000 ;22 " PUNCT
|
||
|
|
DB %00001000 ;23 # PUNCT
|
||
|
|
DB %00001000 ;24 $ PUNCT
|
||
|
|
DB %00001000 ;25 % PUNCT
|
||
|
|
DB %00001000 ;26 & PUNCT
|
||
|
|
DB %00001000 ;27 ' PUNCT
|
||
|
|
DB %00001000 ;28 ( PUNCT
|
||
|
|
DB %00001000 ;29 ) PUNCT
|
||
|
|
DB %00001000 ;2A * PUNCT
|
||
|
|
DB %00001000 ;2B + PUNCT
|
||
|
|
DB %00001000 ;2C , PUNCT
|
||
|
|
DB %00001000 ;2D - PUNCT
|
||
|
|
DB %00001000 ;2E . PUNCT
|
||
|
|
DB %00001000 ;2F / PUNCT
|
||
|
|
DB %00110000 ;30 0 DIGIT + HEX
|
||
|
|
DB %00110000 ;31 1 DIGIT + HEX
|
||
|
|
DB %00110000 ;32 2 DIGIT + HEX
|
||
|
|
DB %00110000 ;33 3 DIGIT + HEX
|
||
|
|
DB %00110000 ;34 4 DIGIT + HEX
|
||
|
|
DB %00110000 ;35 5 DIGIT + HEX
|
||
|
|
DB %00110000 ;36 6 DIGIT + HEX
|
||
|
|
DB %00110000 ;37 7 DIGIT + HEX
|
||
|
|
DB %00110000 ;38 8 DIGIT + HEX
|
||
|
|
DB %00110000 ;39 9 DIGIT + HEX
|
||
|
|
DB %00001000 ;3A : PUNCT
|
||
|
|
DB %00001000 ;3B ; PUNCT
|
||
|
|
DB %00001000 ;3C < PUNCT
|
||
|
|
DB %00001000 ;3D = PUNCT
|
||
|
|
DB %00001000 ;3E > PUNCT
|
||
|
|
DB %00001000 ;3F ? PUNCT
|
||
|
|
|
||
|
|
|
||
|
|
;char tolwr(char c) - Convert to Lower Case
|
||
|
|
; sets Carry if if Converted
|
||
|
|
tolwr: JSR isupc ;If Char is Not Upper Case
|
||
|
|
BCC isrts ; Return
|
||
|
|
ORA $20 ;Else Set Bit 6
|
||
|
|
RTS ; and Return
|
||
|
|
|
||
|
|
;char toupr(char c) - Convert to Upper Case
|
||
|
|
; sets Carry if if Converted
|
||
|
|
toupr: JSR islwr ;If Char is Not Lower Case
|
||
|
|
BCC isrts ; Return
|
||
|
|
AND $DF ;Else Clear Bit 6
|
||
|
|
RTS ; and Return
|
||
|
|
|
||
|
|
|