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"url": "https://www.v2ex.com/t/1032528",
"title": "\u5173\u4e8e\u65e5\u672c\ud83c\uddef\ud83c\uddf5\u548c\u56fd\u5185\u5c0f\u75c5\u533b\u7597\u7684\u7591\u95ee\u548c\u63a2\u8ba8",
"id": "https://www.v2ex.com/t/1032528",
"date_published": "2024-04-15T02:22:44+00:00",
"content_html": "\u4e0a\u5468\u56db\u6241\u6843\u4f53\u53d1\u708e\uff0c\u53d1\u70e7\u5230 38\u00b05 \uff0c\u7acb\u523b\u9884\u7ea6\u5bb6\u9644\u8fd1\u7684\u8bca\u6240 A \u3002\u770b\u5b8c\u4e4b\u540e\u7ed9\u5f00\u4e86\u4e00\u5806\u836f\uff0c\u7ed3\u679c\u8d8a\u5403\u70e7\u7684\u8d8a\u5389\u5bb3\uff0c\u5468\u4e00\u51cc\u6668\u76f4\u63a5\u70e7\u5230 40\u00b0\uff0c\u6253\u4e86\u65e5\u672c 119 \uff0c\u7ed9\u6211\u62c9\u53bb\u75c5\u9662 B \u6302\u70b9\u6ef4\uff0c\u8c22\u5929\u8c22\u5730\u6302\u4e86\u534a\u5c0f\u65f6\u70b9\u6ef4\u4e4b\u540e\uff0c\u8fd8\u6709\u534a\u888b\u6ca1\u6302\u5b8c\uff0c\u5c31\u88ab\u533b\u751f\u62d4\u9488\u8bf4\u4f60\u53ef\u4ee5\u8d70\u4e86\u3002\u662f\u8212\u670d\u4e86\u4e00\u4e36\u4e36\uff0c\u56de\u5230\u5bb6\u7761\u4e86 5 \u5c0f\u65f6\uff0c\u4f53\u6e29\u53c8\u56de\u5230 40\u00b0\uff0c\u9042\u6253\u7535\u8bdd\u54a8\u8be2\u75c5\u9662 B,\u4ed6\u8ba9\u6211\u627e\u5176\u4ed6\u8bca\u6240\uff0c\u5b8c\u7f8e\u8e22\u76ae\u7403\uff0c\u9042\u6253\u7535\u8bdd\u7ed9\u8bca\u6240 A \uff0c\u8ba9\u4ed6\u7ed9\u6211\u5f00\u75c5\u9662\u7684\u4ecb\u7ecd\u4fe1\uff0c\u8bf4\u4e0d\u6253\u9488\u6839\u672c\u6cbb\u4e0d\u597d\u6241\u6843\u4f53\u5316\u8113\uff0c\u7ea6\u4e86\u4e0b\u5348 1 \u70b9 10 \u5206\u590d\u8bca\u5f00\u4fe1\uff0c\u5e0c\u671b\u80fd\u987a\u5229\u5f00\u5230\u4ecb\u7ecd\u4fe1\uff0c\u987a\u5229\u53bb\u533b\u9662\u6302\u6c34\u3002
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{
"author": {
"url": "https://www.v2ex.com/member/freewizard",
"name": "freewizard",
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},
"url": "https://www.v2ex.com/t/33668",
"title": "DCPU-16 1.1",
"id": "https://www.v2ex.com/t/33668",
"date_published": "2012-04-26T06:52:33+00:00",
"content_html": "http://www.reddit.com/r/dcpu16/comments/sqfre/rfe_dcpu16_11/
Swapped the names of \"a\" and \"b\" to make it more clear what gets processed first, and to make special opcodes not have only a b value.
Added a very basic interrupt handler
Outlined some hardware detection basics
Made the text 80 characters wide because 80's
Implemented ALL of following:
DCPU-16 Spec Suggestions
=======================
1. Evaluate b before a
----------------------------------------------
This makes instructions that address the stack twice meaningful instead of confusing and useless.
`ADD PEEK, POP` *should* pop the top of the stack and add it to the second entry, but currently the `PEEK` is evaluated before the `POP` occurs.
2. Add [SP+next word] addressing
----------------------------------------------
This makes writing functions that store extra variables or arguments on the stack easier.
POP isn't useful as an a value, and PUSH isn't useful as a b value, so they should be combined into one value, with postincrement and predecrement determined by whether they're in a/b.
3. Make opcodes 5 bits
--------------------------------
A literal a value is not very useful, and having 2x more opcodes is very useful.
bbbbbbaaaaaaoooo
becomes
bbbbbbaaaaaooooo
4. Make literal range include -1.
-----------------------------------
Shift the literal range from [0, 31] to [-1, 30].
Having -1 as a literal lets you useful one-word instructions like:
``` NEG X --> MUL X, -1
NOT X --> XOR X, -1```
5. Rename O register to EX or OV
-------------------------------------
O and 0 are very easy to confuse, other special registers are two characters, and it doesn't always represent overflow.
6. Add signed MUL/DIV instructions
--------------------------------------
Signed operations make maneuvers, targeting, and fixed-point trigonometry routines more efficient.
Suggested mnemonics: `MLI`, `DVI`.
7. Add signed right shift (ASR)
-----------------------------------------
Signed operations are useful.
8. Add additional IF instructions
------------------------------------
Supporting all the relations (<, >, <=, >=) will make assembly easier to write and read. Suggested mnemonics and effects:
0x11: IFB a, b - performs next instruction only if (a&b)!=0 (Bit set)
0x12: IFE a, b - performs next instruction only if a==b (Equal)
0x13: IFN a, b - performs next instruction only if a!=b (Not equal)
0x14: IFG a, b - performs next instruction only if a>b (signed) (Greater)
0x15: IFA a, b - performs next instruction only if a>b (unsigned) (Above)
0x16: IFL a, b - performs next instruction only if a<b (signed) (Less)
0x17: IFU a, b - performs next instruction only if a<b (unsigned) (Under)
Appendix A.
===========
1. Fix line drawing characters
------------------------------
As [jecowa noted on reddit](http://www.reddit.com/r/dcpu16/comments/sio8u/dcpu_font_help_what_are_those_first_30ish_glyphs/c4ekx9u), you can't make full boxes with the current line drawing characters.
These 22 glyphs let you draw boxes:
\u2502\u2500\u2514\u250c\u2510\u2518\u2534\u251c\u252c\u2524\u253c
\u2551\u2550\u255a\u2554\u2557\u255d\u2569\u2560\u2566\u2563\u256c
Suggestions for extra 5 glyphs:
\u00b0 (Degree) and \u2660\u2665\u2666\u2663 (Card suits)
Note that the full block \u2588 with fg color X is equivalent to space with bg X. Replace it with a dithered \u2592 half-block."
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"title": "\u8c01\u80fd\u4ecb\u7ecd\u4e00\u4e0b0x10c\u5230\u5e95\u795e\u5947\u5728\u4ec0\u4e48\u5730\u65b9\uff1f",
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"date_modified": "2019-04-12T06:19:40+00:00",
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\u56e7
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},
"url": "https://www.v2ex.com/t/31478",
"date_modified": "2012-04-22T03:10:01+00:00",
"content_html": "http://0x10cforum.com/forum/m/4932880/viewthread/2702855-game-screenshot",
"date_published": "2012-04-05T21:29:51+00:00",
"title": "0x10c \u6700\u521d\u7684\u4e00\u4e9b\u5c4f\u5e55\u622a\u56fe",
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"date_modified": "2012-04-22T18:25:59+00:00",
"content_html": "http://pypi.python.org/pypi/0x10c-asm/0.0.2\r\n
\r\n
Python \u7248\u672c\u7684\u5b9e\u73b0\u4e5f\u51fa\u6765\u4e86\u3002",
"date_published": "2012-04-05T09:25:26+00:00",
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"date_modified": "2012-04-22T16:33:46+00:00",
"content_html": "http://0x10c.com/doc/dcpu-16.txt\r\n
\r\n
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\r\n
https://github.com/swetland/dcpu16",
"date_published": "2012-04-04T18:38:37+00:00",
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