Apple-2-SW
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apple2_print_uint16
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Apple 2 Print Unsigned Int16
19 Commits 1 Branch 0 Tags 74 KiB
Assembly 86.6%
Makefile 8%
C 5.4%
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Michaelangel007 c9ffff1961 Optimized down to 91 bytes 2017-07-05 23:08:47 -07:00
README.md Optimized down to 91 bytes 2017-07-05 23:08:47 -07:00
print_uint16 Optimized down to 91 bytes 2017-07-05 23:08:47 -07:00
print_uint16.s Optimized down to 91 bytes 2017-07-05 23:08:47 -07:00

README.md

Print unsigned 16-bit

6502 assembly code to print an unsigned 16-bit in 91 bytes ($5B).

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
0808:61 08 48 A2 00 8E 5D 08
0810:8E 5E 08 8E 5F 08 A2 10
0818:F8 0E 61 08 68 2A 48 A0
0820:FD B9 60 07 79 60 07 99
0828:60 07 C8 D0 F4 CA D0 E9
0830:68 D8 A0 03 B9 5C 08 20
0838:41 08 88 D0 F7 8A F0 11
0840:60 48 20 7B F8 20 4B 08
0848:68 29 0F D0 04 E0 00 F0
0850:EF C9 0A 90 02 69 06 69
0858:B0 E8 4C ED FD 00 00 00
0860:00 00

License

WTFPL

Thanks

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

References

Apple Monitor: Print Integer?