> >Does anyone out there have a datasheet and/or programming info
(register
> >addressing scheme) for the Mostek MK3801 multi-function I/O device (a
> >Z80 peripheral)? I can't find one anywhere. (Info for MK68901 and
> >other "derivatives" is available, but these devices are apparently
not
> >clones.) Any help much appreciated.
> >Chris R.
> ------
> You're not thinking of the MK3881 by any chance? I've sure misread 8s
> & 0s
> a few times...
>
> mike
No, it's really an MK3801 that's of interest. Thanks for asking.
Chris R.
I went to my storage locker again yesterday, and retrieved a few
more goodies:
- VAX-11/730 (R80, RL02)
- MINC-11
- VT50
I won't mess with these much until I make some more progress on my
current projects, but it's good to have them at home.
-Dave
--
Dave McGuire
Port Charlotte, FL
Date: Thu, 27 Mar 2008 11:15:59 -0400
From: Chris Rodie <ccrodie at bellsouth.net>
Subject: Need MK3801 datasheet
>Does anyone out there have a datasheet and/or programming info (register
>addressing scheme) for the Mostek MK3801 multi-function I/O device (a
>Z80 peripheral)? I can't find one anywhere. (Info for MK68901 and
>other "derivatives" is available, but these devices are apparently not
>clones.) Any help much appreciated.
>Chris R.
------
You're not thinking of the MK3881 by any chance? I've sure misread 8s & 0s
a few times...
mike
> > Chris Rodie wrote:
> > Does anyone out there have a datasheet and/or programming info
> > (register addressing scheme) for the Mostek MK3801 multi-function I/O
> > device (a Z80 peripheral)? I can't find one anywhere. (Info for
> > MK68901 and other "derivatives" is available, but these devices are
> > apparently not clones.) Any help much appreciated.
> >
> > Chris R.
> >
> >
> I have MOSTEK 1982/1983 Microelectronic Data Book that has 15 pages on
> the MK3801. Would scanning that help you? Do you need everything or >
> just part - takes time to scan of course...
>
> John :-#)#
John,
Many thanks for the offer. If you would scan just the pages with the
register set description that would be sufficient.
Chris R.
> Date: Fri, 28 Mar 2008 00:33:20 -0500
> From: Jim Leonard
> I have a BIOS listing of the PCjr (techref is in front of me); I will look
> at the listing to see if I can see obvious places where this would result
> in a savings. Thanks for the discussion and history.
I first noticed this when I first looked at the PC AT techref. "Why
the heck did they code (fill in a routine name) in two pieces like
that?" I asked myself. After I grabbled the PC 5150 techref it was
obvious.
Later, when I got the Phoenix BIOS books, routine locations were
called out specifically in the literature, so I wasn't dreaming.
I can well imagine that it's useful to some code to know the
locations of entry points and ISRs. There was initially no standard
convention for "hooking" interrupt vectors, so knowing where the
default one was might be useful. I can think of at least one
instance where that might be useful--reverse-engineering protection.
Calling the ROM BIOS directly precludes a snoopy programmer from just
hooking the INT 13H vector and logging a program's disk activity.
When I was unraveling copy protection from some of the original PC
games, I found having my own custom-hacked BIOS ROMs for such stuff
very handy indeed.
I do know that the convention continued into the PS/2 line--and, a
spot check on the system I've got in front of me (an HP P4-equipped
model) shows that the INT 10h vector still points to F000:F065; INT
16h points to F000:E82E--the same addresses used on the original
5150.
Cheers,
Chuck
On 3/28/08, Zane H. Healy <healyzh at aracnet.com> wrote:
>
> Doesn't Ultrix support early models of the VAXstation 3100? I don't
> believe it supports any model in the 4000 series. I honestly don't
> know, the tapes I have are V1 or V2, and only support MicroVAX I & II
> systems. I've only tried to run Ultrix on MIPS-based DECstation
> 5000/133 (the system was actually purchased to run NetBSD). As I've
> said before, I like my Unix nice and fast, and prefer to run
> interesting OS's on PDP-11's, VAXen, and Alpha's. If it's a VAX, it
> should be running VMS.
>
> Zane
>
I already have VMS on my Alpha and the VAX; if I can't get Research
Unix on the VAX, I'll stay with VMS. The later additions to Research
Unix evolved in some interesting directions which eventually led to
Plan 9, the OS I develop for at work. I'd love to find a Blit
(AT&T/Teletype model 5620) terminal and a VAX capable of running v10;
that was a brilliant system.
John
--
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn
Hi Joseph,
as I told you in a former eMail, which probably miss you, I am
interested on your TI-99/4a. So, could you think about shipping it to
Austria/Europe, I will pay packing and shipping, no question.
Thanks for any answer
Gerhard
gerhard.kreuzer at liftoff.at[1]
Links:
------
[1] mailto:gerhard.kreuzer at liftoff.at
Hi Rod,
? ?maybe I can help. I have a M8330 board, but status is unknown and I?
think I also have sn74194s, but I have to search for them.
? ?How shure you are about this diagnose, did you take some?
measuremens with an oszilloscope or similar?
? ?With best regards
? ?Gerhard
I have complete HP150 and HP110 systems that I would like to give to a
collector. I am relocating and do not have the space for these machines
anymore. Here's a summary of what I have:
An HP150 system in good working condition
- built-in thermal printer
- dual HP-IB floppy drives
- HP-IL/parallel expansion card
- tilt-swivel base
- keyboard
- Thinkjet printer (HP-IB interface)
- all HP-IB cables
- lots of software and manuals, including original system, demo,
Memomaker, Lotus 1-2-3, Visicalc, and calculator disks, among others
- lots of manuals, including original system and DOS manuals, among others
- The HP Museum (http://www.hpmuseum.net/display_item.php?hw=43) has
details on the HP150
An HP110 system in non-working condition
- the system has a bad memory chip somewhere in the RAM disk; the system
boots and runs; the system diagnostics identify the bad chip; the RAM
disk does not reliably retain data
- two HP-IL floppy drives
- Thinkjet printer (HP-IL)
- all HP-IL cables
- all power adapters
- original system and software disks
- original manuals
- The HP Museum (http://www.hpmuseum.net/display_item.php?hw=48) has
details on the HP110
I also have a TRS-80 Model III (no floppy drives), an IBM PC/XT keyboard
(a heavy metal keyboard, PN#1801449), and an IBM 5152 Personal Computer
Graphics Printer.
Everything is boxed up at the moment. If you are interested, I will
unbox them and provide details. I won't charge anything to pass the
systems onto a collector who can pick them up in Phoenix, AZ USA.
Please send me an e-mail if you're interested in anything.
Thank you,
-Peter Neubauer
Does anyone out there have a datasheet and/or programming info (register
addressing scheme) for the Mostek MK3801 multi-function I/O device (a
Z80 peripheral)? I can't find one anywhere. (Info for MK68901 and
other "derivatives" is available, but these devices are apparently not
clones.) Any help much appreciated.
Chris R.
