hp proprietary uP history (9825 uP?)

From: J. David Bryan <jdbryan_at_acm.org>
Date: Wed May 5 14:57:48 2004

On 3 May 2004 at 16:19, Joe R. wrote:

> I'm not sure what kind of processor was in the 520 but I don't think it
> was a standard CPU like the 680x0 that was used in the 9000/200 and
> 300s.

It's described in the August 1983 HP Journal article, "An 18-MHz, 32-Bit
VLSI Microprocessor." Excerpt:

  "The heart of HP's new 32-bit VLSI computer system is the
   Memory/Processor Module. The central processing unit in this module
   is an NMOS circuit containing 450,000 transistors on a single chip
   operating at a clock frequency of 18 MHz. This compact CPU chip,
   which implements a 32-bit version of the HP 3000 Computer's
   stack-based architecture, is designed and microprogrammed to support
   multiple-CPU operations within a single Memory/Processor Module."

That issue was dedicated to the hardware, and the March 1984 issue covered
the 9000/520 software.

                                      -- Dave
Received on Wed May 05 2004 - 14:57:48 BST