Apple-2-SW/apple2_print_uint16
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Apple 2 Print Unsigned Int16
14 Commits 1 Branch 0 Tags 74 KiB
Assembly 86.6%
Makefile 8%
C 5.4%
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Michaelangel007 1e45852a50 Cleanup HexA comment
2017-07-05 19:45:51 -07:00
print_uint16 Optimized 117 bytes 2017-07-05 19:38:09 -07:00
print_uint16.s Cleanup HexA comment 2017-07-05 19:45:51 -07:00
README.md Optimized 117 bytes 2017-07-05 19:38:09 -07:00

README.md

Print unsigned 16-bit

6502 assembly code to print an unsigned 16-bit in 117 bytes ($75).

  • No zero-page usage
  • Only 1 ROM entry point: COUT
  • Includes 7 byte demo

Machine Code

Copy/Paste into your favorite emulator.

0800:A9 12 A2 34 4C 07 08 8E
0808:7A 08 8D 7B 08 A9 00 8D
0810:70 08 8D 71 08 8D 72 08
0818:A2 10 F8 0E 7A 08 2E 7B
0820:08 A0 FD B9 73 07 79 73
0828:07 99 73 07 C8 D0 F4 CA
0830:D0 E9 D8 A0 04 A9 B0 8D
0838:74 08 B9 6F 08 20 53 08
0840:88 D0 F7 8E 70 08 B9 74
0848:08 20 ED FD C8 CC 70 08
0850:90 F4 60 48 20 7B F8 20
0858:5D 08 68 29 0F D0 04 E0
0860:00 F0 0C C9 0A 90 02 69
0868:06 69 B0 9D 74 08 E8 60
0870:00 00 00 00 00 00 00 00
0878:00 00 00 00

License

WTFPL

Thanks

  • qkumba for great optimization ideas as always
  • Everyone on comp.sys.apple2

References

Apple Monitor: Print Integer?