Apple-2-SW/apple2_print_uint16
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Apple 2 Print Unsigned Int16
16 Commits 1 Branch 0 Tags 74 KiB
Assembly 86.6%
Makefile 8%
C 5.4%
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Michaelangel007 b58037fa8b Update features
2017-07-05 20:29:04 -07:00
print_uint16 Optimized down to 96 bytes 2017-07-05 20:28:10 -07:00
print_uint16.s Optimized down to 96 bytes 2017-07-05 20:28:10 -07:00
README.md Update features 2017-07-05 20:29:04 -07:00

README.md

Print unsigned 16-bit

6502 assembly code to print an unsigned 16-bit in 96 bytes ($60).

Features:

  • No zero-page usage
  • Only 2 ROM entry points: COUT, SCRN2
  • Includes 7 byte demo

Machine Code

Copy/Paste into your favorite emulator.

0800:A9 12 A2 34 4C 07 08 8E
0808:65 08 8D 66 08 A9 00 8D
0810:61 08 8D 62 08 8D 63 08
0818:A2 10 F8 0E 65 08 2E 66
0820:08 A0 FD B9 64 07 79 64
0828:07 99 64 07 C8 D0 F4 CA
0830:D0 E9 D8 A0 03 B9 60 08
0838:20 44 08 88 D0 F7 8A E0
0840:00 F0 11 60 48 20 7B F8
0848:20 4E 08 68 29 0F D0 04
0850:E0 00 F0 0C C9 0A 90 02
0858:69 06 69 B0 20 ED FD E8
0860:60 00 00 00 00 00 00

License

WTFPL

Thanks

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

References

Apple Monitor: Print Integer?