z80 registersz80 haven
z80 instruction timing
z80 sbc instruction
z80 instruction set
z80 cpl
z80 ccf
z80 instruction set summary

Z80 Assembly - Instructions: Working With Data. The notation Syntax: adc a,op8 (8 bits) or adc hl,reg16 (16 bits, reg16 can be BC, DE, HL or SP). The sum of The N flag indicates whether the last instruction was an add or subtract. These flags are used by the DAA instruction. Adding The following code shows how to 31 Oct 2014 When this instruction is executed, the A register is BCD corrected using the contents of the flags. The exact process is the following: if the least The DAA instruction adjusts this result so that correct BCD representation is obtained: 0011 1100 3C result +0000 0110 06 +error --------------- 0100 0010 42 16 Nov 2011 Does it just modify the accumulator anyway, based on the conditions set out in the DAA table, regardless of the previous instruction? Yes. The documentation is 8 Bit Transfer Instructions. 8080 Mnemonic, Z80 Mnemonic, Machine Code, Operation. MOV, A,A, LD .. ACI, byte, ADC, A,byte, CEbyte, A <- A + byte + CarryZ80 CPU. User Manual iii. Revision History. Each instance in the following revision history table reflects a . Specific Z80 Instruction Examples . .. ADC HL, ss . adc a,a adc a,b adc a,c adc a,d adc a,e adc a,h adc a,l adc a,ixh adc a,ixl adc a,iyh adc a,iyl adc a,(hl) adc a,(ix+n) adc a Разве он просто модифицирует аккумулятор в любом случае на основе условий, указанных в таблице DAA, независимо от предыдущей инструкции? This is an overview of the Z80 instruction set, including undocumented instructions ADC A,(IY+o), 19, 21, 5, 7, FD 8E o, 3 ADC HL,DE, 15, 17, 2, 2, ED 5A, 2.