Re: Upgrading memory of Pioneer models - other than 42s Message #4 Posted by Karl Schneider on 18 Oct 2008, 2:05 a.m., in response to message #3 by Christoph Giesselink
Hi, Christoph --
Quote:
A memory upgrade on the Low End (10B/20S/21S) and Mid Range (14B/22S/32S/32SII) Pioneers isn't possible. The memory of these calculators is integrated in the custom chip (256B or 512B).
The HP-32S from 1988 and HP-32SII from 1991 were compromised by lack of user RAM -- 390 bytes for the HP-32S, and 384 bytes for the HP-32SII, which also offered equations to use storage. The HP-15C from 1982 had 469 bytes total.
The HP-32S/SII programming paradigm is good enough to keep "in-residence" programs and/or equations, but the user is occasionally forced to delete some -- along with variables -- to free up space. This is frustrating.
The 2-kB RAM of the HP-28C from 1986 was inadequate for that "symbolic-object" machine, but would have been quite ample for the HP-32S/SII. I've wondered why that same RAM chip (if it was one) couldn't have been used: Cost of the chip? Too close in capacity to the much-costlier HP-42S with 7 kB?
You probably provided the technical answer why more RAM could not be easily incorporated, but it's still disappointing.
-- KS
Edited: 18 Oct 2008, 12:38 p.m.
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