表2-13 输入指令表2-15 CPU控制指令 端口地址(PORT ADDRESS) IMMED. REG. INDIR. 'NOP' 00 n (C) 'HALT' 76 INPUT 'IN' REG ADDRESSING A DB n ED 78 DISABLE INT '(DI)' F3 B ED 40 ENABLE INT '(EI)' FB C ED 48 SET INT MODE 0 'IM0' ED 46 D ED 50 SET INT MODE 1 'IM1' ED 56 E ED 58 SET INT MODE 2 'IM2' ED 5E H ED 60 L ED 68 'INI'-INPUT & Ine B≠0 REG. INDIR. (HL) ED A2 数据快输入命令(BLOCK MANDS 'INIR'- HL. Dec B ED B2 'IND'-INPUT & Dec b ED AA 'INDR'- HL. Dec IF B≠0 ED BA
