Re: [Bulk] CISC (ugh!) question -- MIDRANGE-L

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Thanks for the thoughts, and the system builder link. My brother had a TRS-80 Model II. With that 48K RAM, maybe the B50 held back 16M for the same sort of overhead.

Just needed to think about TRS-80 limits and scale up, I guess.

John McKee
-----Original message-----
From: James Lampert jamesl@xxxxxxxxxxxxxxxxx
Date: Thu, 29 Sep 2011 19:00:52 -0500
To: Midrange Systems Technical Discussion midrange-l@xxxxxxxxxxxx
Subject: Re: [Bulk] CISC (ugh!) question

Mark S. Waterbury wrote:

See Chapter 6. And, yes, apparently 48 MB was the maximum main
storage size for the B50 (no explanation as to why.)

Reminds me of my old TRS-80 Model I, which had an absolute maximum of
48k (not M!). Out of the 64k address space of a Zilog Z80, 12k was the
BASIC ROM, 1k was static RAM for the screen buffer, and the rest was
memory-mapped I/O.

--
JHHL
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