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  • ...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
  • 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
  • ...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:HALT|HALT]] [[Category:Z80 Assembly]]
    616 bytes (92 words) - 22:10, 5 February 2016
  • ...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
  • ...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
  • ...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: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
  • ...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
  • 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
  • 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:CP|CP]] (HL) # [[Z80:Opcodes:DEC|DEC]] HL
    936 bytes (151 words) - 22:42, 5 February 2016
  • ...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
  • Like [[Z80:Opcodes:SRA|SRA]], except a 0 is put into bit 7. The bits are all shifted right, wi ...pcodes:RRD|RRD]],[[Z80:Opcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]]
    1 KB (183 words) - 22:28, 5 February 2016
  • ...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:PUSH|PUSH]]
    983 bytes (150 words) - 22:06, 5 February 2016
  • ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (208 words) - 22:33, 5 February 2016
  • [[Z80:Opcodes:SCF|SCF]] [[Category:Z80 Assembly]]
    578 bytes (86 words) - 22:11, 5 February 2016
  • ...pcodes:OTIR|OTIR]],[[Z80:Opcodes:OUT|OUT]],[[Z80:Opcodes:OUTD|OUTD]],[[Z80:Opcodes:OUTI|OUTI]] [[Category:Z80 Assembly]]
    864 bytes (137 words) - 22:21, 5 February 2016
  • ...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
  • 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

Page text matches

  • ...inc c]] || [[Z80:Opcodes:DEC|dec c]] || [[Z80:Opcodes:LD|ld c,x]] || [[Z80:Opcodes:RRCA|rrca]] ...inc e]] || [[Z80:Opcodes:DEC|dec e]] || [[Z80:Opcodes:LD|ld e,x]] || [[Z80:Opcodes:RRA|rra]]
    19 KB (3,362 words) - 08:19, 6 February 2016
  • Here is a page for instructions that you can use in a z80 processor. Click on the instruction to gain more information about the spec * [[Z80:Opcodes:ADC|ADC]]
    2 KB (309 words) - 22:21, 5 February 2016
  • ...ber in [[Z80:Control Structures|Control Structures]] how we used the [[Z80:Opcodes:CP|CP]] instruction? This instruction subtracts the operand from the accumu ...lags in some way or another. For a list of system flags you can use, see [[Z80:System Flags|here]].
    12 KB (2,030 words) - 08:02, 6 February 2016
  • '''[[z80:Tutorials|Tutorials]]''' '''[[z80:Appendices|Appendices]]'''
    4 KB (510 words) - 08:18, 6 February 2016
  • ...ports. For a list of ports and the corresponding hardware item, see this [[Z80:Ports|page]]. ...NIR|INIR]], [[Z80:Opcodes:OTIR|OTIR]], [[Z80:Opcodes:INDR|INDR]], or [[Z80:Opcodes:OTDR|OTDR]].
    17 KB (2,951 words) - 08:25, 6 February 2016
  • * Iambian's [http://iambianet.freewebpage.org/t/asm06.html Some (z80) Assembly Required Controlling Flow] ...real world. So, we need to apply this idea of conditions into programming. Z80 has 2 uses conditions:
    10 KB (1,600 words) - 07:57, 6 February 2016
  • === [[Z80:Buffer Tables|Buffer Tables]] === === [[Z80:Character Maps|Character Maps]] ===
    2 KB (212 words) - 07:40, 6 February 2016
  • An "undocumented" instruction. Functions like [[Z80:Opcodes:SLA|SLA]], except a 1 is inserted into the low bit. r denotes 8-bit register. IX and IY values assumed from [[Z80:Opcodes:SLA|SLA]]. Needs confirmation.
    1 KB (167 words) - 22:09, 5 February 2016
  • ...pts: hardware and software. Software interrupts are triggered by the [[Z80:Opcodes:RST|RST]] command, and won't be discussed in this tutorial. Examples of har * [[Z80:Grey Scale|grayscale]]
    7 KB (1,090 words) - 06:16, 5 February 2016
  • Like [[Z80:Opcodes:RLD|RLD]], except rotation is rightward. ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]]
    756 bytes (118 words) - 22:15, 5 February 2016
  • Like [[Z80:Opcodes:SRA|SRA]], except a 0 is put into bit 7. The bits are all shifted right, wi ...pcodes:RRD|RRD]],[[Z80:Opcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]]
    1 KB (183 words) - 22:28, 5 February 2016
  • Performs a [[Z80:Opcodes:RRC|RRC A]] faster and modifies the flags differently. ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]]
    899 bytes (144 words) - 22:29, 5 February 2016
  • Performs [[Z80:Opcodes:RLC|RLC A]] much quicker, and modifies the flags differently. ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]]
    859 bytes (136 words) - 22:36, 5 February 2016
  • Performs a [[Z80:Opcodes:RR|RR A]] faster, and modifies the flags differently. ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]]
    900 bytes (144 words) - 22:37, 5 February 2016
  • Performs an [[Z80:Opcodes:RL|RL A]], but is much faster and S, Z, and P/V flags are preserved. ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]]
    901 bytes (150 words) - 22:42, 5 February 2016
  • ...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
  • ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (208 words) - 22:33, 5 February 2016
  • ...80:Opcodes:RES|RES]],[[Z80:Opcodes:SCF|SCF]],[[Z80:Opcodes:SET|SET]],[[Z80:Opcodes:XOR|XOR]] [[Category:Z80 Assembly]]
    1 KB (224 words) - 22:37, 5 February 2016
  • ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (202 words) - 22:08, 5 February 2016
  • ...pcodes:SLA|SLA]],[[Z80:Opcodes:SLL|SLL/SL1]],[[Z80:Opcodes:SRA|SRA]],[[Z80:Opcodes:SRL|SRL]] [[Category:Z80 Assembly]]
    1 KB (185 words) - 22:16, 5 February 2016

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