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Z80 и быстрая память 
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From: Bill Shen
Date: Tue, May 23, 202
Subject: Re: [retro-comp] Regarding suitable access time of RAM/ROM
To: retro-comp <>

If you ground the chip select of RAM, the access time from output enable and write enable is shorter than 55nS. Also bear in mind AS6C4008 is rated 55nS from 2.7V to 5.5V; it is slowest at 2.7V yet still capable of 55nS access so it is significantly faster at 5V. Almost all my Z80 designs run at 22Mhz with AS6Cx008–a clear violation of timing spec, but work every time, RAM access time is the least of my problem.



23 May 2023 23:54
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