>
> From: Al Kossow <aek at bitsavers.org>
> To: cctalk at classiccmp.org
> Cc:
> Date: Sun, 22 Dec 2013 09:08:12 -0800
> Subject: Re: RFC Ethernet Bus Interface V1
> On 12/22/13 8:43 AM, Al Kossow wrote:
>
>> Here is a first draft. Anything wrong/missing architecturally?
>>
>>
> The one thing that I didn't think of was not handling 18 bit data transfers
> on Unibus DMA, though now that I've thought of it adding the data parity
> bits
> to the buffering wouldn't be a big deal even if there wouldn't be any code
> behind it.
>
> That is only an issue for two systems I can think of, KS10s and
> Unichannel-15s..
>
<snip>
> Now, as usual whenever I think about this, I'll spend the next several
> weeks
> trying to get a tool chain running to actually get "hello world" running on
> an ARM proto board or the equivalent on an FPGA board. Maybe it'll actually
> work this time (I think I've tried doing this for several years running now
> and gave up when after buying a prototyping board I couldn't get anything
> to work).
>
>>
>>
Having an 18-bit Unibus interface for the KS10 is a great idea. You could
easily put enough RAM on the board to emulate several Massbus disk drives
and save the disk images on flash.
Last year I made a Posibus Peripheral Emulator with an Actel SmartFusion
FPGA/ARM
http://www.ricomputermuseum.org/Home/equipment/pdp-8-l/making-a-posibus-per…
I started with an Emcraft SOM module, used the free FPGA tool chain from
Actel, and the FPGA and uC Linux image from Emcraft. Linux was running on
the SOM when it was first powered up.
http://www.emcraft.com/products/255
All I needed to to was make an interface board from the 3.3V logic in the
FPGA to the Posibus in the PDP-8/L. My idea was to put the time sensitive
logic in the FPGA and do everything else with a Linux device driver and
application.
You could do the same and use something like an M9014 module to connect to
the Unibus. Once the circuit was debugged you could make a PCB that plugged
directly into the Unibus and had a socket for the FPGA SOM. Since all of
the Unibus logic is in the FPGA the single board could respond to many
Unibus addresses and then emulate multiple peripherals at the same time.
With a little FPGA logic change, and a bit of coding, you could run SIMH on
the ARM in the FPGA and then emulate just about any CPU.
--
Michael Thompson
Does anyone have a source for a Fujitsu MB8866 FDC chip? I've found some
mention of it being a direct substitution for a WD1791, but the latter
does not cooperate in this machine.
Steve
--
Dave,
Don't worry they've been spoken for.
The new owner will pick them up tomorrow. And it's not the last parisc machine I have. But I find myself owing a lot of equipment which only future seems te be occupying storage space. So those have to go..
-Rik
-----Oorspronkelijk bericht-----
Van: "Dave Land" <xmechanic at landcomp.net>
Verzonden: ?23-?12-?2013 08:43
Aan: "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Onderwerp: Re: Free (only pickup) 2 HP9000 D-serie systems
On 12/20/13 2:27 PM, Rik Bos wrote:
> I've two HP 9000 D-series systems one D380 and the other a D280 (I think)
>
> Those are pa-risc systems running HP-UX 11i one is a dual processor system
> the other has 1 proc.
>
> The D380 is loaded with a video card and several other cards.
>
> With some drives and other goodies, free for pickup only.
>
> Systems are located in the Netherlands near Groningen.
>
> If no one wants them I'll scrap them.
>
>
>
> -Rik
>
>
>
>
>
>
>
Man, I'd take them in a minute if I was in NL. You realize of course you
could load these with HPPA-Linux now that we're getting the debian-ports
archive refreshed with recent builds. :)
See: http://parisc-linux.org or my site at http://landcomp.net:884/wp/
to see what has been going on recently. :) Hope if they are salvagable,
you don't throw them out!
Dave L.
--
Dave Land
Land Computer Service xmechanic at landcomp.net
ICQ: 676030523
Does anyone know of a source for a battery for an Apple Duo 230 laptop?
I've got a Duo, and got it working, but no battery (works on AC).
Ultimately, I'd like one battery "for show" that's all original (don't care
if it works or not) and another I can "crack open" to restore/repair for
actual battery power use...
I've been watching various outlets for a while, and simply haven't
seen/found any..
Thanks.
Earl
I've two HP 9000 D-series systems one D380 and the other a D280 (I think)
Those are pa-risc systems running HP-UX 11i one is a dual processor system
the other has 1 proc.
The D380 is loaded with a video card and several other cards.
With some drives and other goodies, free for pickup only.
Systems are located in the Netherlands near Groningen.
If no one wants them I'll scrap them.
-Rik
>
> Does anyone know exactly what was in the Lobo branded "SASI" external
hard
> drive? I've managed to convince my Max-80 to talk with a 10MB MFM drive
> behind an Adaptec ACB-4000 bridge controller. It formats and verifies
> without a complaint, accepts bad sector information and creates a working
> CP/M volume. But, for some reason I cannot get it to boot from the hard
> disk.
>
> It won't be the end of the world if I have to cold-start from a floppy,
> but my curiousity is getting the better of me. The utility that writes
> the boot sectors works fine - there's a brief flicker of drive activity
> and no error messages. When I set the DIP switches to cold-boot the hard
> disk, I can see the busy LED on the bridge board light up solid and the
> machine freezes. Under normal I/O, the drive activity LED illuminates at
> the same time as the one on the ACB-4000, but at boot I never see the
> drive itself respond.
>
> I'm assuming that there's some incompatibility between the ACB-4000 and
> the boot PROM. It would help to know what it's expecting to see. I've
> been digging through the boot ROM sources, but nothing jumps out so far.
>
> FWIW, I've tried an Adaptec ACB-5500 controller (same results), a Xebec
> 1410 (won't format or verify, but can be written/read) and a Xebec 1410A
> (I/O errors).
>
> Steve
Steve,
What OS are you using? I understand that the original OS had an OS bug
related to direct hard drive booting. I can check around if you have not
yet resolved the problem
Bill
Hi,
I have an unusal east german PC, an A7150 aka CM1910.
This Computer isn't build out of a motherboard and Slot Cards,
it hast Modules and a passive Backplane with something like a Multibus-1
Bus using DIN41462 connectors, one for the System Bus (MMS16) the other for
a Localbus.
The Computer contains a CPU with 8086/87 and two SZ80-A based Subsystems
for Graphics (using a NEC 7220) and Disk IO (2 Floppies and at ST506
Interface).
The Computer is running DOS3.3, CP/M86 and a Unix called MUTOS, an realtime
System called BOS1810 is also available, but I don't know an western
equivalent for it. The 1810 ic comming from the soviet name of the 8086
Chips, they are named K1810xx. Here at robotrontechnik.de is a page about
this Computer
http://www.robotrontechnik.de/index.htm?/html/computer/a7150.htm
buit it is in german. Here are some pictures of cards from this machine:
http://www.robotrontechnik.de/index.htm?/html/computer/a7150.htm
Ok, so far so good. This Machine is running DOS, but it isn't that much XT
Compatible. The Graphics are emulating CGA (doublescan) for this mode but
are capable to do 640x480 in 256 Colors. The Processor is clocked with 4,9
Mhz, which schould be a little faster than a average XT but the Bus
arbitation brings in some more delay. The BUS is capable of multimastering
which isn't used in this machine but takes time..
I have at least 3 of this machines, they aren't that rare in the former
GDR and the Eastern Block.
I've tried to put in a NEC V30 CPU which is working principially, but the
BIOS in the Machine rejects it later. The Machine Checks are simple to
precise. For Example the ACT Acceptance Test reports a bad PIT Timer (8254)
since it Checks the correctness of the timer with some loop of instructions
>from the CPU. The BIOS of this machine consists of 4 2764 EPROMS and it
therefore 32Kbyte long.
So far the Intro, Now I wan't to disassemble the BIOS with the checks to
build a version that's capable to run on a V30. Why? Just for fun...
I've now looking for available 8086 emulators to load end step trough the
BIOS code while looking what happens there (I'm not a x86 guy at all).
Found two emulators on the Net (emu8086 and I8086emu) both both of them
aren't capable to load a binary file as BIOS and step trough it.
The emu8086 has'nt any capability to load the code in that are that I want
f000:f800 until the end of the 1MB, at least I found no way to do this an
dgot no answer to my question to the author and the 2nd one wich runs on
Windows and Linux (FreeBSD to) as long as they are 32BIT OS's seems to
support not more than 64KB Code in the last available release.
So the final question is: Does someone know wo a software that can do that?
Kind Regards and a merry Christmas,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583
www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741
There are still three (3) of the S-100 bus extender boards left if you are
looking for them. These are the nice ones with a logic probe, LEDs,
speakers, fuses, lead clip-ons, etc.
http://s100computers.com/My%20System%20Pages/Extender%20Board/Extender%20Boa
rd.htm
The PCBs will be $20 each as per the usual arrangement. Shipping in the US
is $3 for a single PCB and $2 for each additional PCB. Shipping
internationally is $12.75 for a single PCB and $3 for each additional PCB.
This is for the bare basics USPS first class postage with no tracking or
insurance. The builder assumes all risk of delivery as per usual
arrangement.
There is also one S-100 Parallel IO V2 PCB (limited edition) available for
$30. These are a limited special order and have all the patches and
improvements from the last batch. No cuts or jumpers required.
Please send a PayPal to LYNCHAJ at YAHOO.COM with the subject "S-100 bus
extender" or "S-100 Parallel IO V2" and I will send your board(s).
Thanks and have a nice day!
Andrew Lynch
Someone went through the trouble to identify the magazine in the movie
Wargames that set off the events in that movie. http://mw.rat.bz/wgmag/
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
Brad,
Yeah, if I can FIND one, I figured the folks at AHCS could help me rebuild it. I'm probably going to have a "big" rebuild laptop battery task, once I at least find batteries for all the Mac laptops I got on that palette of Macs. However, sadly, the Duo 230 is the ONLY one that didn't have even ONE battery pack in the pile. I've been hunting on ebay and various other sites, but aside from one or two units (and one full unit and docking station) I've not seen any even LISTED for sale...
I'm still interested in 2 of them, if anybody knows of a source...
Earl
> Message: 18
> Date: Sat, 21 Dec 2013 02:46:03 -0500
> From: BE Arnold <bearnold at outlook.com>
> Subject: Re: Apple Duo 230 Battery?
>
> Many battery packs of that time are nothing more than a bunch of NiCad sub-C cells. If we could determine that it is such, I can build you one.
> Can you bring one to the meeting today?
>
>
>> On Dec 21, 2013, at 12:34 AM, "Earl Baugh" <earl at baugh.org> wrote:
>>
>> Does anyone know of a source for a battery for an Apple Duo 230 laptop?
>> I've got a Duo, and got it working, but no battery (works on AC).
>> Ultimately, I'd like one battery "for show" that's all original (don't care
>> if it works or not) and another I can "crack open" to restore/repair for
>> actual battery power use...
>>
>> I've been watching various outlets for a while, and simply haven't
>> seen/found any..
>>
>> Thanks.
>>
>> Earl
