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ASCII Hex Equivalents

Submitted by Tom Owad on August 15, 2004 - 7:07pm. Apple I | 1976 | Schematics, subroutines, etc.

Program to print ASCII HEX equivalent of any keyboard character

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Error in code

Submitted by markaufflick on November 30, 2006 - 12:38am.

There is a mistake in the code in ascii.txt - it seems is reading $D811 when it is wanting to read KBDCR - ie. $D011. There is also an extraneous line at the top of the file (09f0: 20).

I think the program should be:



0700: A9 8D     ; LDA $8D   == newline char

0702: 20 EF FF  ; JSR $FFEF == ECHO

0705: AD 11 D0  ; LDA $D011 == KBDCR

0708: 10 FB     ; BPL -5    == 0705

070A: AD 10 D0  ; LDA $D010 == KBD

070D: AA        ; TAX

070E: 20 EF FF  ; JSR $FFEF == ECHO

0711: A9 A0     ; LDA $A0   == space char

0713: 20 EF FF  ; JSR $FFEF == ECHO

0716: 8A        ; TXA

0717: 20 DC FF  ; JSR $FFDC == PRBYTE

071A: 4C 00 07  ; JMP $0700 == start

PS: sorry for the formatting - seems that applefritter doesn't honour the code tags.

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