Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site allegra.UUCP
Path: utzoo!linus!security!genrad!decvax!harpo!ulysses!allegra!karn
From: karn@allegra.UUCP (Phil Karn)
Newsgroups: net.ham-radio
Subject: Xerox 820 Questions
Message-ID: <2391@allegra.UUCP>
Date: Tue, 10-Apr-84 00:57:40 EST
Article-I.D.: allegra.2391
Posted: Tue Apr 10 00:57:40 1984
Date-Received: Wed, 11-Apr-84 01:43:14 EST
Organization: Bell Communications Research, Inc
Lines: 23

From Larry Kayser
Re Xerox 820 boards
I have been sort of tracking the 820 news and since one of these 
boards is due here soon I would like to determine some details so
that we might make reasonably prompt use of the 820.

Specific Questions
-Does anyone have a complete assembler listing for the 820 BIOS?
(I understand the BIOS is in two parts, disk for 6 sectors and 
EPROM as well)
-Has anyone brought up BYE running beneath the CCP, that is lower
in the memory space?
-Has anyone brought up ZCPR2 on the 820?
-Has anyone brought up SIGNON on the 820?
-Has anyone brought up a Western Digital 1001 hard disk 
controller on an 820?
-Has anyone done a simple modification for double density?
-Has anyone added a large RAM capability to emulate a disk drive?


My specific interest is to use the 820 in a gateway to replace an
old 8080 system.  Any help will be appreciated.
Regards, Larry Kayser