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IA188EM-PQF100I-R 数据表(PDF) 86 Page - InnovASIC, Inc |
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IA188EM-PQF100I-R 数据表(HTML) 86 Page - InnovASIC, Inc |
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86 / 133 page  IA186EM/IA188EM Data Sheet 8/16-BIT Microcontrollers As of Production Version -03 mod field (Modifier Field) mod Description 11 r/m is treated as a register field 00 DISP = 0, disp-low and disp-high are absent - address displacement is 0. 01 DISP = disp-low sign-extended to 16-bits, disp-high is absent. 10 DISP = disp-high: disp-low. aux field (Auxiliary Field) aux If mod = 11 and word = 0 If mod = 11 and word = 1 000 AL AX 001 CL CX 010 DL DX 011 BL BX 100 AH SP 101 CH BP 110 DH SI 111 BH DI When mod $ 11, depends on instruction r/m field r/m Description 000 EA = (BX) + (SI) + DISP [where EA is the Effective Address] 001 EA = (BX) + (DI) + DISP 010 EA = (BP) + (SI) + DISP 011 EA = (BX) + (DI) + DISP 100 EA = (SI) + DISP 101 EA = (DI) + DISP 110 EA = (BP) + DISP [except if mod = 00, then EA = disp-high: disp-low] 111 EA = (BX) + DISP Displacement The displacement is an 8 or 16 bit value added to the offset portion of the address. Immediate The immediate bytes consist of up to 16 bits of immediate data. 3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com |
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