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03.04.2009, 09:55 Uhr
Tom Nachdenk
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Die Weisheit das der Z80 intern mit 4 Bit arbeitet stammt von Masatoshi Shima persönlich:
http://www.ieee.org/portal/cms_docs_iportals/iportals/aboutus/history_center/oral_history/pdfs/Shima197.pdf
Seite 43
| Zitat: | In the case of the Z80, it was quite simple because I knew 8080 well. The biggest problem in developing the Z80 was how not to copy 8080's logic. For example, with the 8080, I used an 8-bit arithmetical unit. In the case of the Z80, I needed just compatibility for software and a little more performance, with the same clock. I was able to use 4-bit arithmetic units, in an 8-bit microprocessor. For all of the area, I needed to find a different logic and a different circuitry approach for the Z80. That was the biggest difficulty.
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Wobei mir nicht ganz klar ist was damit nun gemeint ist.
Dieser Beitrag wurde am 03.04.2009 um 09:56 Uhr von Tom Nachdenk editiert. |
