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Create the page "Z80 Opcodes" on this wiki! See also the search results found.

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  • Z80:Opcodes:IN
    ...odes:OUTD|OUTD]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OUTI|OUTI]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    1 KB (205 words) - 22:32, 5 February 2016
  • Z80:Opcodes:SLA
    ...pcodes:RRD|RRD]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (177 words) - 22:28, 10 March 2017
  • Z80:Opcodes:CPL
    [[Z80:Opcodes:NEG|NEG]],[[Z80:Opcodes:XOR|XOR]] [[Category:Z80 Assembly]]
    669 bytes (106 words) - 22:38, 5 February 2016
  • Z80:Opcodes:RETN
    ...80:Opcodes:IM|IM]],[[Z80:Opcodes:RET|RET]],[[Z80:Opcodes:RETI|RETI]],[[Z80:Opcodes:RST|RST]] [[Category:Z80 Assembly]]
    650 bytes (94 words) - 22:05, 5 February 2016
  • Z80:Opcodes:DI
    ...:Opcodes:IM|IM]],[[Z80:Opcodes:RETI|RETI]],[[Z80:Opcodes:RETN|RETN]],[[Z80:Opcodes:RST|RST]] [[Category:Z80 Assembly]]
    595 bytes (87 words) - 22:24, 5 February 2016
  • Z80:Opcodes:OR
    Used in bit-masking. For more information see [[Z80:Flags and Bit-Level Instructions|here]]. ...80:Opcodes:RES|RES]],[[Z80:Opcodes:SCF|SCF]],[[Z80:Opcodes:SET|SET]],[[Z80:Opcodes:XOR|XOR]]
    1 KB (183 words) - 07:50, 6 February 2016
  • Z80:Opcodes:DJNZ
    DJNZ is a very useful instruction when it comes to creating loops. See [[Z80:Control Structures|Control Structures]] to find out more about loops. [[Z80:Opcodes:CALL|CALL]],[[Z80:Opcodes:JP|JP]],[[Z80:Opcodes:JR|JR]]
    830 bytes (127 words) - 08:00, 6 February 2016
  • Z80:Opcodes:XOR
    ...8-bit input and compares it with the accumulator. XOR is similar to [[Z80:Opcodes:OR|Or]], except for one thing: only 1 of the 2 test bits can be set or else ...t to invert sprites and such. It is also very useful in bit-masking. See [[Z80:Flags and Bit-Level Instructions|here]] for more information about bit-mask
    1 KB (218 words) - 07:50, 6 February 2016
  • Z80:Opcodes:HALT
    [[Z80:Opcodes:DI|DI]],[[Z80:Opcodes:EI|EI]],[[Z80:Opcodes:NOP|NOP]] [[Category:Z80 Assembly]]
    901 bytes (144 words) - 22:39, 5 February 2016
  • Z80:Opcodes:LDDR
    Repeats the instruction [[Z80:Opcodes:LDD|LDD]] (Does a LD (DE),(HL) and decrements each of DE, HL, and BC) until [[Z80:Opcodes:LD|LD]],[[Z80:Opcodes:LDD|LDD]],[[Z80:Opcodes:LDI|LDI]],[[Z80:Opcodes:LDIR|LDIR]]
    822 bytes (129 words) - 22:05, 5 February 2016
  • Z80:Opcodes:JR
    ...Can be conditional or unconditional. JR takes up one less byte than [[Z80:Opcodes:JP|JP]], but is also slower. Weigh the needs of the code at the time before ...pcodes:CPI|CPI]],[[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:DJNZ|DJNZ]],[[Z80:Opcodes:JP|JP]]
    1 KB (229 words) - 18:31, 19 March 2017
  • Z80:Opcodes:NOP
    [[Z80:Opcodes:HALT|HALT]] [[Category:Z80 Assembly]]
    616 bytes (92 words) - 22:10, 5 February 2016
  • Z80:Opcodes:OUT
    ...odes:OUTD|OUTD]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OUTI|OUTI]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    1 KB (162 words) - 22:33, 5 February 2016
  • Z80:Opcodes:RETI
    ...80:Opcodes:IM|IM]],[[Z80:Opcodes:RET|RET]],[[Z80:Opcodes:RETN|RETN]],[[Z80:Opcodes:RST|RST]] [[Category:Z80 Assembly]]
    647 bytes (95 words) - 22:21, 5 February 2016
  • Z80:Opcodes:ADC
    ...80:Opcodes:DEC|DEC]],[[Z80:Opcodes:INC|INC]],[[Z80:Opcodes:SBC|SBC]],[[Z80:Opcodes:SUB|SUB]] [[Category:Z80 Assembly]]
    1 KB (204 words) - 22:39, 5 February 2016
  • Z80:Opcodes:RES
    ...[Z80:Opcodes:OR|OR]],[[Z80:Opcodes:SCF|SCF]],[[Z80:Opcodes:SET|SET]],[[Z80:Opcodes:XOR|XOR]] [[Category:Z80 Assembly]]
    956 bytes (153 words) - 22:06, 5 February 2016
  • Z80:Opcodes:PUSH
    ...you want to load a 16-bit register into another 16-bit register (the [[Z80:Opcodes:LD|LD]] instruction won't work for this). [[Z80:Opcodes:POP|POP]]
    891 bytes (132 words) - 01:53, 14 March 2017
  • Z80:Opcodes:LDIR
    Repeats [[Z80:Opcodes:LDI|LDI]] (LD (DE),(HL), then increments DE, HL, and decrements BC) until B [[Z80:Opcodes:LD|LD]],[[Z80:Opcodes:LDD|LDD]],[[Z80:Opcodes:LDDR|LDDR]],[[Z80:Opcodes:LDI|LDI]]
    789 bytes (118 words) - 22:10, 5 February 2016
  • Z80:Opcodes:RRC
    ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (199 words) - 22:33, 5 February 2016
  • Z80:Opcodes:JP
    ...decide whether speed or size is more important before choosing JP or [[Z80:Opcodes:JR|JR]]. JP (HL), JP (IX), and JP (IY) are unconditional and are the fastes ...pcodes:CPI|CPI]],[[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:DJNZ|DJNZ]],[[Z80:Opcodes:JR|JR]]
    2 KB (292 words) - 21:57, 5 February 2016

Page text matches

  • Z80:Opcodes:SRA
    ...pcodes:RRD|RRD]],[[Z80:Opcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (171 words) - 22:12, 10 March 2017
  • Z80:Opcodes:RLC
    ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (190 words) - 22:24, 5 February 2016
  • Z80:Opcodes:RRC
    ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (199 words) - 22:33, 5 February 2016
  • Z80:Opcodes:CPI
    # [[Z80:Opcodes:CP|CP]] (HL) # [[Z80:Opcodes:INC|INC]] HL
    968 bytes (154 words) - 22:38, 5 February 2016
  • Z80:Opcodes:CPD
    # [[Z80:Opcodes:CP|CP]] (HL) # [[Z80:Opcodes:DEC|DEC]] HL
    936 bytes (151 words) - 22:42, 5 February 2016
  • Z80:Opcodes:JP
    ...decide whether speed or size is more important before choosing JP or [[Z80:Opcodes:JR|JR]]. JP (HL), JP (IX), and JP (IY) are unconditional and are the fastes ...pcodes:CPI|CPI]],[[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:DJNZ|DJNZ]],[[Z80:Opcodes:JR|JR]]
    2 KB (292 words) - 21:57, 5 February 2016
  • Z80:Opcodes:CPDR
    Repeats [[Z80:Opcodes:CPD|CPD]] until either: Note if you used [[Z80:Opcodes:CPIR|CPIR]] it would find the first occurrence of 124 in the valid memory s
    1 KB (181 words) - 21:59, 5 February 2016
  • Z80:Opcodes:CPIR
    Repeats [[Z80:Opcodes:CPI|CPI]] until either: Note if you used [[Z80:Opcodes:CPDR|CPDR]] it would find the last occurrence of 124 in the valid memory sp
    1 KB (181 words) - 22:21, 5 February 2016
  • Z80:Opcodes:CALL
    ...[Z80:Opcodes:DJNZ|DJNZ]],[[Z80:Opcodes:JP|JP]],[[Z80:Opcodes:JR|JR]],[[Z80:Opcodes:RET|RET]] [[Category:Z80 Assembly]]
    2 KB (249 words) - 22:22, 5 February 2016
  • Z80:Opcodes:JR
    ...Can be conditional or unconditional. JR takes up one less byte than [[Z80:Opcodes:JP|JP]], but is also slower. Weigh the needs of the code at the time before ...pcodes:CPI|CPI]],[[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:DJNZ|DJNZ]],[[Z80:Opcodes:JP|JP]]
    1 KB (229 words) - 18:31, 19 March 2017
  • Z80:Opcodes:XOR
    ...8-bit input and compares it with the accumulator. XOR is similar to [[Z80:Opcodes:OR|Or]], except for one thing: only 1 of the 2 test bits can be set or else ...t to invert sprites and such. It is also very useful in bit-masking. See [[Z80:Flags and Bit-Level Instructions|here]] for more information about bit-mask
    1 KB (218 words) - 07:50, 6 February 2016
  • Z80:Data Manipulation and Basic Math
    ...all we can do is multiply a number by powers of 2! Or is it? Remember, the z80 processor (in fact, all modern computers) are binary based. And also, the s ...odes:SLA|SLL]] will put a 1 into the 0th bit, as opposed to a 0 from [[Z80:Opcodes:SLA|SLA]].
    6 KB (974 words) - 20:58, 3 February 2016
  • Z80:Opcodes:OUTI
    ...pcodes:OUT|OUT]],[[Z80:Opcodes:OUTD|OUTD]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    853 bytes (136 words) - 22:42, 5 February 2016
  • Z80:Opcodes:OUTD
    ...pcodes:OUT|OUT]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OUTI|OUTI]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    831 bytes (134 words) - 22:00, 5 February 2016
  • Z80:Opcodes:RET
    ...pcodes:CPI|CPI]],[[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:RETI|RETI]],[[Z80:Opcodes:RETN|RETN]] [[Category:Z80 Assembly]]
    1 KB (211 words) - 22:43, 5 February 2016
  • Z80:Opcodes:CP
    ...[Z80:Opcodes:CPIR|CPIR]],[[Z80:Opcodes:JP|JP]],[[Z80:Opcodes:JR|JR]],[[Z80:Opcodes:RET|RET]] [[Category:Z80 Assembly]]
    1 KB (226 words) - 22:06, 5 February 2016
  • Z80:Opcodes:OTIR
    ...pcodes:OUT|OUT]],[[Z80:Opcodes:OUTD|OUTD]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OUTI|OUTI]] [[Category:Z80 Assembly]]
    850 bytes (132 words) - 22:07, 5 February 2016
  • Z80:Opcodes:OTDR
    ...pcodes:OUT|OUT]],[[Z80:Opcodes:OUTD|OUTD]],[[Z80:Opcodes:OUTI|OUTI]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    841 bytes (131 words) - 22:08, 5 February 2016
  • Z80:Opcodes:INDR
    ...odes:OUTD|OUTD]],[[Z80:Opcodes:OTDR|OTDR]],[[Z80:Opcodes:OUTI|OUTI]],[[Z80:Opcodes:OTIR|OTIR]] [[Category:Z80 Assembly]]
    845 bytes (131 words) - 22:08, 5 February 2016
  • Z80:Opcodes:INI
    ...pcodes:OTIR|OTIR]],[[Z80:Opcodes:OUT|OUT]],[[Z80:Opcodes:OUTD|OUTD]],[[Z80:Opcodes:OUTI|OUTI]] [[Category:Z80 Assembly]]
    866 bytes (137 words) - 22:16, 5 February 2016

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