2017-07-05 23:44:21 +00:00
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# Print unsigned 16-bit
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2017-07-06 14:58:22 +00:00
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6502 assembly code to print an unsigned 16-bit.
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2017-07-05 23:44:21 +00:00
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2017-07-06 03:29:04 +00:00
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Features:
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2017-07-05 23:57:33 +00:00
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2017-07-06 14:58:22 +00:00
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* Highly optimized for space
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2017-07-06 22:28:28 +00:00
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* No zero-page usage [version](print_uint16.s) 81 ($51) bytes
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* With zero-page usage [version](print_uint16_zp.s) 69 ($45) bytes
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* With stack var usage [version](print_uint16_sp.s) 83 ($53) bytes
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2017-07-06 03:29:04 +00:00
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* Only 2 ROM entry points: COUT, SCRN2
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2017-07-06 00:00:07 +00:00
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* Includes 7 byte demo
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2017-07-05 23:58:26 +00:00
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2017-07-05 23:45:22 +00:00
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# Machine Code
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2017-07-05 23:57:33 +00:00
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Copy/Paste into your favorite emulator.
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2017-07-06 14:58:22 +00:00
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Sans-Zero-Page version:
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2017-07-05 23:46:01 +00:00
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```asm
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2017-07-05 23:45:22 +00:00
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0800:A9 12 A2 34 4C 07 08 8E
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2017-07-06 22:28:28 +00:00
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0808:57 08 48 A2 00 8E 54 08
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0810:8E 55 08 8E 56 08 A2 10
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0818:F8 0E 57 08 68 2A 48 A0
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0820:FD B9 57 07 79 57 07 99
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0828:57 07 C8 D0 F4 CA D0 E9
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0830:68 D8 A0 03 B9 53 08 20
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2017-07-06 22:08:39 +00:00
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0838:41 08 88 D0 F7 8A F0 0E
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2017-07-06 06:08:47 +00:00
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0840:60 48 20 7B F8 20 4B 08
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2017-07-06 22:08:39 +00:00
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0848:68 29 0F D0 01 CA E8 F0
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2017-07-06 22:28:28 +00:00
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0850:EF 4C E5 FD 00 00 00 00
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2017-07-05 23:46:01 +00:00
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```
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2017-07-05 23:45:22 +00:00
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2017-07-06 14:58:22 +00:00
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With-Zero-Page version:
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```asm
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0900:A9 12 A2 34 4C 07 09 86
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0908:FC 48 A0 00 84 FD 84 FE
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0910:84 FF A0 10 F8 06 FC 68
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0918:2A 48 A2 FD B5 00 75 00
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0920:95 00 E8 D0 F7 88 D0 ED
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0928:68 D8 A0 03 B9 FC 00 20
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2017-07-06 22:08:39 +00:00
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0930:39 09 88 D0 F7 8A F0 0E
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2017-07-06 14:58:22 +00:00
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0938:60 48 20 7B F8 20 43 09
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2017-07-06 22:08:39 +00:00
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0940:68 29 0F D0 01 CA E8 F0
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2017-07-06 22:28:28 +00:00
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0948:EF 4C E5 FD
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2017-07-06 14:58:22 +00:00
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```
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2017-07-05 23:57:33 +00:00
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2017-07-06 19:43:29 +00:00
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With-Stack-Page version:
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```asm
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2017-07-06 20:04:23 +00:00
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0A00:A9 12 A2 34 4C 07 0A A0
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0A08:00 48 DA 5A 5A 5A A0 10
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0A10:F8 BA 8E 30 0A 1E 04 01
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0A18:3E 05 01 20 3C 0A 20 3C
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0A20:0A 20 3C 0A 88 D0 EA D8
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0A28:BD 00 01 20 47 0A CA E0
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0A30:00 D0 F5 8A 69 04 AA 9A
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2017-07-06 22:08:39 +00:00
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0A38:98 F0 19 60 BD 01 01 7D
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2017-07-06 20:04:23 +00:00
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0A40:01 01 9D 01 01 E8 60 48
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0A48:20 7B F8 20 51 0A 68 29
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2017-07-06 22:28:28 +00:00
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0A50:0F D0 01 88 C8 F0 E4 4C
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0A58:E5 FD
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2017-07-06 19:43:29 +00:00
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```
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2017-07-05 23:47:13 +00:00
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# License
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[WTFPL](http://www.wtfpl.net/)
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2017-07-05 23:57:33 +00:00
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2017-07-06 00:01:04 +00:00
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# Thanks
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2017-07-05 23:57:33 +00:00
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* qkumba for great optimization ideas as always
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2017-07-06 19:45:49 +00:00
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* Gids for a gentle nudge to have a zero-page version
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2017-07-06 00:01:04 +00:00
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* Everyone on comp.sys.apple2
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2017-07-05 23:57:33 +00:00
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2017-07-05 23:44:21 +00:00
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# References
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2017-07-05 23:47:13 +00:00
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* [printm](https://github.com/Michaelangel007/apple2_printm)
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2017-07-05 23:44:21 +00:00
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Apple Monitor: Print Integer?
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* https://groups.google.com/forum/m/#!topic/comp.sys.apple2/EQmJAuNz8Vg
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