Author: Robert Hyatt
Date: 11:31:24 02/23/99
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On February 22, 1999 at 20:04:34, William H Rogers wrote: >Dan >The Z80 is just a made over 8080 with more registers, which allow for smaller >code and faster running if programed right. >I am an old Radio Shack TRS-80 user, and found no complaints with the old system >The model 4 ran at 4 megahertz and I found that it ran some programs faster than >the first 4.7 Mz IBM clones. >Bill had to be some odd programs. The 8080/z80 had no multiply/divide, only worked on 8 bit values, etc. The original 8086 and 8088 (8 bit bus version of 8086) at least had a complete instruction set and worked with 16 bit values. I did a lot of asm programming on 8080/z80's and yes you could do lots of things neatly, including BCD arithmetic. But you'd better not need to do lots of multiply / divides or you get killed. And your loops had better stop at 65535... I don't want to go back to those days. :)
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