Using ROM routines to display hex

zephyr · Post by **zephyr** » Fri Oct 04, 2013 12:14 am

Quick (Encoder 09) example below.

DRAGON

10         ORG     $5000
20         LDD     #$1234
30         BSR     HEX
40         RTS
50 HEX     STD     <$52
60         LDX     #$90E8
70         PSHS    D,X
80         JMP     $A011

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5000 CC1234   LDD   #$1234
5003 8D01     BSR   $5006
5005 39       RTS
5006 DD52     STD   <$52
5008 8E90E8   LDX   #$90E8
500B 3416     PSHS  D,X
500D 7EA011   JMP   $A011

COCO

Code: Select all

10         ORG     $5000
20         LDD     #$1234
30         BSR     HEX
40         RTS
50 HEX     STD     <$52
60         LDX     #$B99F
70         PSHS    D,X
80         JMP     $8BE0

Code: Select all

5000 CC1234   LDD   #$1234
5003 8D01     BSR   $5006
5005 39       RTS
5006 DD52     STD   <$52
5008 8EB99F   LDX   #$B99F
500B 3416     PSHS  D,X
500D 7E8BE0   JMP   $8BE0