Signetics 8x300 instruction set

From: Bob Shannon <>
Date: Sat Dec 4 13:21:30 2004

I've got a 8x300 programming manual. Possibly some
processor chips also.

I'll try to dig it out if this info is not already available.

----- Original Message -----
From: "Tom Jennings" <>
To: <>
Sent: Friday, December 03, 2004 3:05 AM
Subject: Signetics 8x300 instruction set

> I've been trying to recall, with no success, how subroutine
> calls were implemented in the 8x300. I used to write code for
> this weird thing (realtime video processing) and the assembler
> I used (some horror that ran under TSO) hid it from me so I
> don't have a clear recollection of the method.
> It's a really weird CPU, "subroutines" were essentially jumps,
> as in a lot of machines, but the "return" was through some
> strange jump table or something.
> Once upon a time there was a website with CPU instruction cards
> (man I had a huge pile of these things, pitched loooong ago...)
> but I can't find it. Nothing on bitsavers I can find.
> (There's also some really bad info out there on the origins
> of "Harvard" architecture, attributed to some stupid hardvard
> vs. princeton microprocessor design thing. Please -- about 40
> years earlier: that asshole Aiken. No one liked him anyways.)
Received on Sat Dec 04 2004 - 13:21:30 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:36:37 BST