TETRIS ============== ## 机器码 TETRIS 俄罗斯方块游戏 Chip8 的 rom 的二进制机器指令内容为： ```text |addr | 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f |------------------------------------------------------ | 000 | A2 B4 23 E6 22 B6 70 01 D0 11 30 25 12 06 71 FF | 010 | D0 11 60 1A D0 11 60 25 31 00 12 0E C4 70 44 70 | 020 | 12 1C C3 03 60 1E 61 03 22 5C F5 15 D0 14 3F 01 | 030 | 12 3C D0 14 71 FF D0 14 23 40 12 1C E7 A1 22 72 | 040 | E8 A1 22 84 E9 A1 22 96 E2 9E 12 50 66 00 F6 15 | 050 | F6 07 36 00 12 3C D0 14 71 01 12 2A A2 C4 F4 1E | 060 | 66 00 43 01 66 04 43 02 66 08 43 03 66 0C F6 1E | 070 | 00 EE D0 14 70 FF 23 34 3F 01 00 EE D0 14 70 01 | 080 | 23 34 00 EE D0 14 70 01 23 34 3F 01 00 EE D0 14 | 090 | 70 FF 23 34 00 EE D0 14 73 01 43 04 63 00 22 5C | 0a0 | 23 34 3F 01 00 EE D0 14 73 FF 43 FF 63 03 22 5C | 0b0 | 23 34 00 EE 80 00 67 05 68 06 69 04 61 1F 65 10 | 0c0 | 62 07 00 EE 40 E0 00 00 40 C0 40 00 00 E0 40 00 | 0d0 | 40 60 40 00 40 40 60 00 20 E0 00 00 C0 40 40 00 | 0e0 | 00 E0 80 00 40 40 C0 00 00 E0 20 00 60 40 40 00 | 0f0 | 80 E0 00 00 40 C0 80 00 C0 60 00 00 40 C0 80 00 | 100 | C0 60 00 00 80 C0 40 00 00 60 C0 00 80 C0 40 00 | 110 | 00 60 C0 00 C0 C0 00 00 C0 C0 00 00 C0 C0 00 00 | 120 | C0 C0 00 00 40 40 40 40 00 F0 00 00 40 40 40 40 | 130 | 00 F0 00 00 D0 14 66 35 76 FF 36 00 13 38 00 EE | 140 | A2 B4 8C 10 3C 1E 7C 01 3C 1E 7C 01 3C 1E 7C 01 | 150 | 23 5E 4B 0A 23 72 91 C0 00 EE 71 01 13 50 60 1B | 160 | 6B 00 D0 11 3F 00 7B 01 D0 11 70 01 30 25 13 62 | 170 | 00 EE 60 1B D0 11 70 01 30 25 13 74 8E 10 8D E0 | 180 | 7E FF 60 1B 6B 00 D0 E1 3F 00 13 90 D0 E1 13 94 | 190 | D0 D1 7B 01 70 01 30 25 13 86 4B 00 13 A6 7D FF | 1a0 | 7E FF 3D 01 13 82 23 C0 3F 01 23 C0 7A 01 23 C0 | 1b0 | 80 A0 6D 07 80 D2 40 04 75 FE 45 02 65 04 00 EE | 1c0 | A7 00 F2 55 A8 04 FA 33 F2 65 F0 29 6D 32 6E 00 | 1d0 | DD E5 7D 05 F1 29 DD E5 7D 05 F2 29 DD E5 A7 00 | 1e0 | F2 65 A2 B4 00 EE 6A 00 60 19 00 EE 37 23 ``` ## 汇编码 ```text ;---------------------------------------------------- ; ROM Name: ../../roms/TETRIS ; ROM Size: 494 Bytes ;---------------------------------------------------- LD I, L2B4 ; 0xA2B4 CALL L3E6 ; 0x23E6 CALL L2B6 ; 0x22B6 L206: ADD V0, #01 ; 0x7001 DRW V0, V1, #01 ; 0xD011 SE V0, #25 ; 0x3025 JP L206 ; 0x1206 L20E: ADD V1, #FF ; 0x71FF DRW V0, V1, #01 ; 0xD011 LD V0, #1A ; 0x601A DRW V0, V1, #01 ; 0xD011 LD V0, #25 ; 0x6025 SE V1, #00 ; 0x3100 JP L20E ; 0x120E L21C: RND V4, 0x70 ; 0xC470 SNE V4, #70 ; 0x4470 JP L21C ; 0x121C RND V3, 0x03 ; 0xC303 LD V0, #1E ; 0x601E LD V1, #03 ; 0x6103 CALL L25C ; 0x225C L22A: LD DT, V5 ; 0xF515 DRW V0, V1, #04 ; 0xD014 SE V15, #01 ; 0x3F01 JP L23C ; 0x123C DRW V0, V1, #04 ; 0xD014 ADD V1, #FF ; 0x71FF DRW V0, V1, #04 ; 0xD014 CALL L340 ; 0x2340 JP L21C ; 0x121C L23C: SKNP V7 ; 0xE7A1 CALL L272 ; 0x2272 SKNP V8 ; 0xE8A1 CALL L284 ; 0x2284 SKNP V9 ; 0xE9A1 CALL L296 ; 0x2296 SKP V2 ; 0xE29E JP L250 ; 0x1250 LD V6, #00 ; 0x6600 LD DT, V6 ; 0xF615 L250: LD V6, DT ; 0xF607 SE V6, #00 ; 0x3600 JP L23C ; 0x123C DRW V0, V1, #04 ; 0xD014 ADD V1, #01 ; 0x7101 JP L22A ; 0x122A L25C: LD I, L2C4 ; 0xA2C4 ADD I, V4 ; 0xF41E LD V6, #00 ; 0x6600 SNE V3, #01 ; 0x4301 LD V6, #04 ; 0x6604 SNE V3, #02 ; 0x4302 LD V6, #08 ; 0x6608 SNE V3, #03 ; 0x4303 LD V6, #0C ; 0x660C ADD I, V6 ; 0xF61E RET ; 0x00EE L272: DRW V0, V1, #04 ; 0xD014 ADD V0, #FF ; 0x70FF CALL L334 ; 0x2334 SE V15, #01 ; 0x3F01 RET ; 0x00EE DRW V0, V1, #04 ; 0xD014 ADD V0, #01 ; 0x7001 CALL L334 ; 0x2334 RET ; 0x00EE L284: DRW V0, V1, #04 ; 0xD014 ADD V0, #01 ; 0x7001 CALL L334 ; 0x2334 SE V15, #01 ; 0x3F01 RET ; 0x00EE DRW V0, V1, #04 ; 0xD014 ADD V0, #FF ; 0x70FF CALL L334 ; 0x2334 RET ; 0x00EE L296: DRW V0, V1, #04 ; 0xD014 ADD V3, #01 ; 0x7301 SNE V3, #04 ; 0x4304 LD V3, #00 ; 0x6300 CALL L25C ; 0x225C CALL L334 ; 0x2334 SE V15, #01 ; 0x3F01 RET ; 0x00EE DRW V0, V1, #04 ; 0xD014 ADD V3, #FF ; 0x73FF SNE V3, #FF ; 0x43FF LD V3, #03 ; 0x6303 CALL L25C ; 0x225C CALL L334 ; 0x2334 RET ; 0x00EE L2B4: DB #80, #00 L2B6: LD V7, #05 ; 0x6705 LD V8, #06 ; 0x6806 LD V9, #04 ; 0x6904 LD V1, #1F ; 0x611F LD V5, #10 ; 0x6510 LD V2, #07 ; 0x6207 RET ; 0x00EE L2C4: DB #40, #E0, #00, #00 DB #40, #C0, #40, #00 DB #00, #E0, #40, #00 DB #40, #60, #40, #00 DB #40, #40, #60, #00 DB #20, #E0, #00, #00 DB #C0, #40, #40, #00 DB #00, #E0, #80, #00 DB #40, #40, #C0, #00 DB #00, #E0, #20, #00 DB #60, #40, #40, #00 DB #80, #E0, #00, #00 DB #40, #C0, #80, #00 DB #C0, #60, #00, #00 DB #40, #C0, #80, #00 DB #C0, #60, #00, #00 DB #80, #C0, #40, #00 DB #00, #60, #C0, #00 DB #80, #C0, #40, #00 DB #00, #60, #C0, #00 DB #C0, #C0, #00, #00 DB #C0, #C0, #00, #00 DB #C0, #C0, #00, #00 DB #C0, #C0, #00, #00 DB #40, #40, #40, #40 DB #00, #F0, #00, #00 DB #40, #40, #40, #40 DB #00, #F0, #00, #00 L334: DRW V0, V1, #04 ; 0xD014 LD V6, #35 ; 0x6635 L338: ADD V6, #FF ; 0x76FF SE V6, #00 ; 0x3600 JP L338 ; 0x1338 RET ; 0x00EE L340: LD I, L2B4 ; 0xA2B4 (0x8C10) ; 0x8C10 SE V12, #1E ; 0x3C1E ADD V12, #01 ; 0x7C01 SE V12, #1E ; 0x3C1E ADD V12, #01 ; 0x7C01 SE V12, #1E ; 0x3C1E ADD V12, #01 ; 0x7C01 L350: CALL L35E ; 0x235E SNE V11, #0A ; 0x4B0A CALL L372 ; 0x2372 SNE V1, V12 ; 0x91C0 RET ; 0x00EE ADD V1, #01 ; 0x7101 JP L350 ; 0x1350 L35E: LD V0, #1B ; 0x601B LD V11, #00 ; 0x6B00 L362: DRW V0, V1, #01 ; 0xD011 SE V15, #00 ; 0x3F00 ADD V11, #01 ; 0x7B01 DRW V0, V1, #01 ; 0xD011 ADD V0, #01 ; 0x7001 SE V0, #25 ; 0x3025 JP L362 ; 0x1362 RET ; 0x00EE L372: LD V0, #1B ; 0x601B L374: DRW V0, V1, #01 ; 0xD011 ADD V0, #01 ; 0x7001 SE V0, #25 ; 0x3025 JP L374 ; 0x1374 (0x8E10) ; 0x8E10 (0x8DE0) ; 0x8DE0 ADD V14, #FF ; 0x7EFF L382: LD V0, #1B ; 0x601B LD V11, #00 ; 0x6B00 L386: DRW V0, V14, #01 ; 0xD0E1 SE V15, #00 ; 0x3F00 JP L390 ; 0x1390 DRW V0, V14, #01 ; 0xD0E1 JP L394 ; 0x1394 L390: DRW V0, V13, #01 ; 0xD0D1 ADD V11, #01 ; 0x7B01 L394: ADD V0, #01 ; 0x7001 SE V0, #25 ; 0x3025 JP L386 ; 0x1386 SNE V11, #00 ; 0x4B00 JP L3A6 ; 0x13A6 ADD V13, #FF ; 0x7DFF ADD V14, #FF ; 0x7EFF SE V13, #01 ; 0x3D01 JP L382 ; 0x1382 L3A6: CALL L3C0 ; 0x23C0 SE V15, #01 ; 0x3F01 CALL L3C0 ; 0x23C0 ADD V10, #01 ; 0x7A01 CALL L3C0 ; 0x23C0 (0x80A0) ; 0x80A0 LD V13, #07 ; 0x6D07 AND V0, V13 ; 0x80D2 SNE V0, #04 ; 0x4004 ADD V5, #FE ; 0x75FE SNE V5, #02 ; 0x4502 LD V5, #04 ; 0x6504 RET ; 0x00EE L3C0: LD I, L700 ; 0xA700 LD [I], V2 ; 0xF255 LD I, L804 ; 0xA804 LD B, V10 ; 0xFA33 LD V2, [I] ; 0xF265 LD F, V0 ; 0xF029 LD V13, #32 ; 0x6D32 LD V14, #00 ; 0x6E00 DRW V13, V14, #05 ; 0xDDE5 ADD V13, #05 ; 0x7D05 LD F, V1 ; 0xF129 DRW V13, V14, #05 ; 0xDDE5 ADD V13, #05 ; 0x7D05 LD F, V2 ; 0xF229 DRW V13, V14, #05 ; 0xDDE5 LD I, L700 ; 0xA700 LD V2, [I] ; 0xF265 LD I, L2B4 ; 0xA2B4 RET ; 0x00EE L3E6: LD V10, #00 ; 0x6A00 LD V0, #19 ; 0x6019 RET ; 0x00EE DB #37, #23 ``` ### 指令解释 TODO