# Print unsigned 16-bit

6502 assembly code to print an unsigned 16-bit.

Features:

* Highly optimized for space
* No zero-page usage   [version](print_uint16.s)    89 ($59) bytes
* With zero-page usage [version](print_uint16_zp.s) 77 ($4D) bytes
* With stack var usage [version](print_uint16_sp.s) 91 ($5B) bytes
* Only 2 ROM entry points: COUT, SCRN2
* Includes 7 byte demo

# Machine Code

Copy/Paste into your favorite emulator.

Sans-Zero-Page version:

```asm
0800:A9 12 A2 34 4C 07 08 8E
0808:5F 08 48 A2 00 8E 5C 08
0810:8E 5D 08 8E 5E 08 A2 10
0818:F8 0E 5F 08 68 2A 48 A0
0820:FD B9 5F 07 79 5F 07 99
0828:5F 07 C8 D0 F4 CA D0 E9
0830:68 D8 A0 03 B9 5B 08 20
0838:41 08 88 D0 F7 8A F0 0E
0840:60 48 20 7B F8 20 4B 08
0848:68 29 0F D0 01 CA E8 F0
0850:EF C9 0A 90 02 69 06 69
0858:B0 4C ED FD 00 00 00 00
```

With-Zero-Page version:

```asm
0900:A9 12 A2 34 4C 07 09 86
0908:FC 48 A0 00 84 FD 84 FE
0910:84 FF A0 10 F8 06 FC 68
0918:2A 48 A2 FD B5 00 75 00
0920:95 00 E8 D0 F7 88 D0 ED
0928:68 D8 A0 03 B9 FC 00 20
0930:39 09 88 D0 F7 8A F0 0E
0938:60 48 20 7B F8 20 43 09
0940:68 29 0F D0 01 CA E8 F0
0948:EF C9 0A 90 02 69 06 69
0950:B0 4C ED FD 
```

With-Stack-Page version:

```asm
0A00:A9 12 A2 34 4C 07 0A A0
0A08:00 48 DA 5A 5A 5A A0 10
0A10:F8 BA 8E 30 0A 1E 04 01
0A18:3E 05 01 20 3C 0A 20 3C
0A20:0A 20 3C 0A 88 D0 EA D8
0A28:BD 00 01 20 47 0A CA E0
0A30:00 D0 F5 8A 69 04 AA 9A
0A38:98 F0 19 60 BD 01 01 7D
0A40:01 01 9D 01 01 E8 60 48
0A48:20 7B F8 20 51 0A 68 29
0A50:0F D0 01 88 C8 F0 E4 C9
0A58:0A 90 02 69 06 69 B0 4C
0A60:ED FD
```

# License

[WTFPL](http://www.wtfpl.net/)


# Thanks

* qkumba for great optimization ideas as always
* Gids for a gentle nudge to have a zero-page version
* Everyone on comp.sys.apple2


# References

* [printm](https://github.com/Michaelangel007/apple2_printm)

Apple Monitor: Print Integer?
* https://groups.google.com/forum/m/#!topic/comp.sys.apple2/EQmJAuNz8Vg