Re: ROMs replacement.. solved!

From: silverdr_at_wfmh.org.pl
Date: Thu, 18 Oct 2012 20:04:06 +0200
Message-Id: <F4BDEE8F-E2C4-49BA-8E10-141D92340E2A@wfmh.org.pl>
On 2012-10-18, at 18:52, Gerrit Heitsch wrote:

>> Why stop there? Replace the TTL with micro-sized versions, mount them inbetween the pin header on the bottom, and make the board the same size as the eprom!
>> Just kidding!  ;-)
> 
> No, the next step would be to design one such circuit for a 250469 board, the one where the BASIC and KERNAL are in one ROM and only the char-ROM is extra.

Yes, that's _exactly_ the next step.

> Should be a bit easier since _KERNAL and _BASIC are already added together by an AND gate on the board. That way one doesn't need a 74LS11, a 74LS08 should do.

We'll get back to it in about a month. On Monday I'll be leaving for four weeks, during which nothing will happen in that area from my side. Then I get back to make next one for the narrow boards.

-- 
SD!
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Received on 2012-10-18 19:00:04

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