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eZ80 CPU User Manual 38 DJNZ d Decrement B Jump not Zero Operation Description B ← B – 1 If B ≠ 0 PC ← PC + d The B register decrements by 1. If the resultant value in register B is not zero, the two’s complement displacement d is added to the value of the program counter. The jump is measured from the address of the instruction Op Code following this instruction. Condition Bits Affected None Mnemonic Operands ADL Mode Cycles Op Codes DJNZ d X 2/4 10, dd UM007701-1100
eZ80 CPU User Manual 39 EI Enable Interrupt Operation Description IEF ← 1 This instruction sets the interrupt enable flags (IEF1 and IEF2) to a logic 1, which allows any maskable interrupt to be recognized. Condition Bits Affected None Mnemonic Operands ADL Mode Cycles Op Codes EI — X 1 FB UM007701-1100
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Page 3 and 4: eZ80 CPU User Manual i Table of Con
Page 5 and 6: eZ80 CPU User Manual iii INIR . . .
Page 7 and 8: eZ80 CPU User Manual v List of Tabl
Page 9 and 10: eZ80 CPU User Manual 1 Introduction
Page 11 and 12: eZ80 CPU User Manual 3 In ADL mode,
Page 13 and 14: eZ80 CPU User Manual 5 CPU Response
Page 15 and 16: eZ80 CPU User Manual 7 I/O Space A
Page 17 and 18: eZ80 CPU User Manual 9 Changing the
Page 19 and 20: eZ80 CPU User Manual 11 Table 4. RE
Page 21 and 22: eZ80 CPU User Manual 13 Suffixes .I
Page 23 and 24: eZ80 CPU User Manual 15 Carry Flag
Page 25 and 26: eZ80 CPU User Manual 17 For compare
Page 27 and 28: eZ80 CPU User Manual 19 ADC HL, ss
Page 29 and 30: eZ80 CPU User Manual 21 ADD rr, ss
Page 31 and 32: eZ80 CPU User Manual 23 BIT b, m Te
Page 33 and 34: eZ80 CPU User Manual 25 CALL cc, Mm
Page 35 and 36: eZ80 CPU User Manual 27 CCF Complem
Page 37 and 38: eZ80 CPU User Manual 29 CPD Compare
Page 39 and 40: eZ80 CPU User Manual 31 CPI Compare
Page 41 and 42: eZ80 CPU User Manual 33 CPL Complem
Page 43 and 44: eZ80 CPU User Manual 35 DEC qq Decr
Page 45: eZ80 CPU User Manual 37 DI Disable
Page 49 and 50: eZ80 CPU User Manual 41 EX DE, HL E
Page 51 and 52: eZ80 CPU User Manual 43 EXX Exchang
Page 53 and 54: eZ80 CPU User Manual 45 IM n Set In
Page 55 and 56: eZ80 CPU User Manual 47 IN r, (C) I
Page 57 and 58: eZ80 CPU User Manual 49 INC qq Incr
Page 59 and 60: eZ80 CPU User Manual 51 IND Input a
Page 61 and 62: eZ80 CPU User Manual 53 IND2R Input
Page 63 and 64: eZ80 CPU User Manual 55 INDMR Input
Page 65 and 66: eZ80 CPU User Manual 57 INI Input a
Page 67 and 68: eZ80 CPU User Manual 59 INI2R Input
Page 69 and 70: eZ80 CPU User Manual 61 INIMR Input
Page 71 and 72: eZ80 CPU User Manual 63 JP (rr) Jum
Page 73 and 74: eZ80 CPU User Manual 65 JP cc, Mmn
Page 75 and 76: eZ80 CPU User Manual 67 JR cc, d Co
Page 77 and 78: eZ80 CPU User Manual 69 LD A, MB Lo
Page 79 and 80: eZ80 CPU User Manual 71 LD A, (pp)
Page 81 and 82: eZ80 CPU User Manual 73 LD (HL), tt
Page 83 and 84: eZ80 CPU User Manual 75 Operation D
Page 85 and 86: eZ80 CPU User Manual 77 LD (Mmn), A
Page 87 and 88: eZ80 CPU User Manual 79 LD (pp), A
Page 89 and 90: eZ80 CPU User Manual 81 LD R, A Loa
Page 91 and 92: eZ80 CPU User Manual 83 LD r, r’
Page 93 and 94: eZ80 CPU User Manual 85 LD SP, rr L
Page 95 and 96: eZ80 CPU User Manual 87 LD tt,(ii)
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eZ80 CPU User Manual 89 LD (uu), r
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eZ80 CPU User Manual 91 LEA tt, IX+
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eZ80 CPU User Manual 93 OR A, s Log
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eZ80 CPU User Manual 95 OTDM Output
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eZ80 CPU User Manual 97 OTDR Output
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eZ80 CPU User Manual 99 OTIM Output
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eZ80 CPU User Manual 101 OTIR Outpu
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eZ80 CPU User Manual 103 OUTD Outpu
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eZ80 CPU User Manual 105 OUT (n), A
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eZ80 CPU User Manual 107 OUTI Outpu
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eZ80 CPU User Manual 109 PEA IX+d P
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eZ80 CPU User Manual 111 POP vv Pop
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eZ80 CPU User Manual 113 RES b, m R
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eZ80 CPU User Manual 115 RET cc Con
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eZ80 CPU User Manual 117 RETN Retur
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eZ80 CPU User Manual 119 RLCA Rotat
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eZ80 CPU User Manual 121 RLD Rotate
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eZ80 CPU User Manual 123 RRA Rotate
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eZ80 CPU User Manual 125 RRC m Rota
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eZ80 CPU User Manual 127 RR m Rotat
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eZ80 CPU User Manual 129 RST n Rest
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eZ80 CPU User Manual 131 SBC HL, ss
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eZ80 CPU User Manual 133 SET b, m S
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eZ80 CPU User Manual 135 SLP Sleep
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eZ80 CPU User Manual 137 SRL m Shif
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eZ80 CPU User Manual 139 SUB A, s S
Page 149 and 150:
eZ80 CPU User Manual 141 TSTIO n Te
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eZ80 CPU User Manual 143 Op Code Ma
Page 153 and 154:
eZ80 CPU User Manual 145 Table 9. O
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eZ80 CPU User Manual 147 Table 11.
Page 157 and 158:
eZ80 CPU User Manual 149 Table 13.
Page 159 and 160:
eZ80 CPU User Manual 151 Index A AD
Page 161 and 162:
eZ80 CPU User Manual 153 IND2, 52 I
Page 163 and 164:
eZ80 CPU User Manual 155 OTI2R, 98
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