| ??? 06/29/07 09:06 Read: times |
#141332 - Solution Responding to: ???'s previous message |
This Routine converts
'0' - '9' en 'A' - 'F' to 00h - 0Fh (Carry = 0) or carry = 1 if input is inavalid Have a nice day Robert
; ********************************************
;DN ASC2HEX
;D Converteer ASCII teken (0..9 A..F) naar Hex nibble
;D C=0 OK, C=1 bij ongeldige invoer
; ********************************************
ASC2HEX: ADD A,#208 ; '0' - 'F' wordt 00h - 16h
JNC ASC2HEX5 ; < '0' is fout
ADD A,#246 ; '0' - '9' wordt F6h - FFh
JC ASC2HEX2 ; > 3Ah (9+1) verder controleren
ADD A,#10 ; F6h - FFh wordt 00h - 09h
ASC2HEX1: CLR C ; OK
RET
ASC2HEX2: ADD A,#249 ; 'A' - 'F' wordt 00h - 06h
JNC ASC2HEX5 ; 3Ah - 40h is fout
ADD A,#250 ; 'A' - 'F' wordt FAh - FFh
JC ASC2HEX5 ; > 'F' is fout
ADD A,#16 ; 'A' - 'F' wordt 0Ah - 0Fh
JMP ASC2HEX1 ; en dat is OK
ASC2HEX5: SETB C ; Fout C=1
RET
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| Topic | Author | Date |
| number in ascii to binary | 01/01/70 00:00 | |
| Not sure if this will help but anyways | 01/01/70 00:00 | |
| Basic method | 01/01/70 00:00 | |
| Needs a bit more error checking | 01/01/70 00:00 | |
| Solution | 01/01/70 00:00 | |
| A Different Solution | 01/01/70 00:00 | |
| I agree | 01/01/70 00:00 | |
thank you | 01/01/70 00:00 |