HP-46 calculator (was Re: Britain is Great (Back from the Island))

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From: Eric Smith <eric_at_brouhaha.com>
Date: Tue Sep 14 00:19:00 1999

I wrote:
> Actually, RAM chips were usually only 1818 if there was some unique
> characteristic, such as a hard-wired address decode. General-purpose
> RAM chips were usually 1820.

Tony says:
> 1818-0156 = 4K 22 pin standard DRAM
> 1818-0701 = 6810 128 byte SRAM
...
> AFAIK, all of those are standard parts, not custom-modified for HP. Or at
> least I've replaced some of them with the equivalents and the device
> worked afterwards :-)
>
> PALs/HALs generally have 1820-numbers, though...

Oops, other way around.
Received on Tue Sep 14 1999 - 00:19:00 BST

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