5 May
2004
5 May
'04
7:57 a.m.
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