ZiLOG Z80 Manual, Handbook

266, APPENDIX A Z-80 Electrical Specifications Z-80 electrical specifications, Z-80 CPU ac characteristics, and ac timing diagram are provided in the tables and figures on the follow- ing pages. 275 …

184, ZiLOG Z80 be done "semi-automatically," that is, one instruction will be exe- cuted. The byte pointed to by HL will be accessed and compared to the contents of the A register. The contents of HL will be incre- mented and the contents of BC will be decremented. If BC 0 after the decrem…

176, 256 COLUMNS VDTTB 1 +1 VDTTB 1 + 31 +6 VDTTBI +0 1141 1114111111[1 Jill I I I 11111jil ROW 0 +32 1 +64 1 2 +96 256 LINES MEMORY TABLE MAPPED TO VDT SCREEN 8192 BYTES - 64K BITS T VDTB1+8191 ROW 255 I O1OV 0 ^____ ___ _ _____________ ^ O L L 0 0 5 V DTTB 1+6 5 BYTE BIT FOR ROW 0, COL 55 1-81T FOR RO…

48, The indexing operation is powerful because many programs must have the ability to process tables or lists of data in memory. Ex- amples of the use of indexing are provided in section II. Instruction groups using the indexed addressing mode are the 8-Bit Load, 8-Bit LD IIY + DI, N LO…

39, 3. Extended Immediate Addressing 4. Register Addressing 5. Register Indirect Addressing 6. Extended Addressing 7. Modified Page Zero Addressing 8. Relative Addressing 9. Indexed Addressing 10. Bit Addressing IMPLIED ADDRESSING In this kind of addressing, the operation code of the instruc…