Could be something wrong with MUL, DIV, ASH, ASHC that may be used in the print
routine, but would not be used during basic OS operation. XXDP in particular is
designed to run on a very basic CPU so it does not normally use any optional
instructions.
I'd start with running the 11/34 CPU tests.
Don
-----Original Message-----
>From: Johnny Billquist <bqt at update.uu.se>
>Sent: Jan 27, 2015 2:42 PM
>To: cctalk at classiccmp.org
>Subject: Re: strange number corruption on pdp11/34
>
>On 2015-01-27 21:24, Noel Chiappa wrote:
>> > From: Jacob Ritorto
>>
>> > I'm getting all zeroes nearly any time there's supposed to be a large
>> > number output to my terminal.
>>
>> It sounds like the CPU may be too broken to run diagnostics. Why don't you
>> try writing some small programs to test various bits and pieces of the CPU
>> (e.g. add instructions, etc), and toggle them in, and try and find what's
>> busted that way? (Although for 'add', if the thing's that broken, I'm amazed
>> it even boots.)
>>
>> Here's an example:
>>
>> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/tests/print.s
>>
>> It's probably too long to toggle in, but you could steal pieces from it
>> and try them.
>>
>> I'd probably try out the shift and multiply instruction to start with; trying
>> to figure out what's probably not used during booting, but could be used
>> during number printing, those are two good bets.
>>
>> Anyway, there's no point to running diagnostics until you get that first
>> problem fixed.
>
>If it comes as far as booting RSX as well as XXDP, there can't be
>anything seriously wrong with the CPU...
>
> Johnny
>
>--
>Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
>email: bqt at softjar.se || Reading murder books
>pdp is alive! || tryin' to stay hip" - B. Idol
> From: Jacob Ritorto
> I'm getting all zeroes nearly any time there's supposed to be a large
> number output to my terminal.
It sounds like the CPU may be too broken to run diagnostics. Why don't you
try writing some small programs to test various bits and pieces of the CPU
(e.g. add instructions, etc), and toggle them in, and try and find what's
busted that way? (Although for 'add', if the thing's that broken, I'm amazed
it even boots.)
Here's an example:
http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/tests/print.s
It's probably too long to toggle in, but you could steal pieces from it
and try them.
I'd probably try out the shift and multiply instruction to start with; trying
to figure out what's probably not used during booting, but could be used
during number printing, those are two good bets.
Anyway, there's no point to running diagnostics until you get that first
problem fixed.
Noel
Hi huys,
a friend of mine informed me that he has an DEC RA81 drive available for
picup in Germany Weimar. Sorry picup onbly, the weight is 67 Kilograms.
The price is to be negotiated with my friend.
Mail me if you are interested, I'll forward mails to him.
Regard,s
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
Much to my chagrin, after passing the original deal (that ostensibly
included a VAX 8600) to a listmember - the owner emailed me to say that he
had incorrectly stated the exact equipment available in his original email
to me. There is no VAX 8600. Not wanting to miss-step again, I talked to him
at some length to make SURE that the following is a correct statement of the
equipment that he is trying to get rid of. I don't think he stated the
equipment incorrectly on purpose, I believe he just wasn't sure what he had.
This stuff is in Houston, TX. If someone wants to take over spearheading
this deal (I do not wish to) please email me off-list.
Here it is..
List of Equipment:
MicroVAX 3400 (details below)
6250 tape drive
DEC PC AXP 150
Alpha Station 200
8mm SCSI tape drive ???
8mm SCSI tape drive EXB-8500 (10 GB)
4mm SCSI tape drive Sony SDT-5000 (8 GB)
Tape drives are in external SCSI enclosures.
============================= MicroVAX 3400 DETAILS
===========================================
MS650-AA
Category: VAX Memory
Description: 8MB MEMORY BOARD FOR MV3300-MV3900/VAX 4200
BA213 Enclosure
Dimensions:27" H x 21" W x 17.8" D. Has castors
Bus details: Q-bus - 12 slots, All slots are Q/CD
Drive bays: Four full height 5.25 bays. One with front access.
Power supply: Dual 230W power supply w/ Line conditioning
Used in: MicroVAX 3400, VAXserver 3400, MicroVAX 3800 VAXserver
3800, factoryVAX-II
Last updated: 2000-02-01
Notes:Industrial box. Commonly referred to as a "skunk box",
expansion version is B213F and has slave power control input.
KA640-BA
MicroVax 3400, used with single user software
M7624-DA
VAX3400 CPU BD M7624-DL
CXY08-M
The CXY08 (M3119) is a Q-bus 8-port asynchronous serial adapter
with full modem control.
M3119-YA
Qbus DEC VAX M3119-YA Multiplexer Card, (Tape drive)
I just dumped and posted on my web site an 8008 (inverted) monitor ROM for
the Intellec/8. It starts at 3800H and came from 8 1702A's on an Intel IMM
6-26 Prom card. I don't think it's for the 8080 even though this PROM card
was used on both 8080 and 8008 Intellec's. I will post updates to this
thread, after I invert the code and check the actual instructions. Anyone
interested to check or use it before I do, be my guest -
http://vintagecomputer.net/browse_thread.cfm?id=595
Bill
Well, I need some help.
I got an ICL Quattro PC
I repaired the PSU.
It powers up, the HD spins and seems to load something.
Then no led activity, may be it's waiting for user input.
I have no ICL terminals.
I tried to connect with a straight serial cable and a terminal emulator,
9600, 8,N,1
No answer in either port.
Tried also a null modem cable. Same stuff.
The DB25 ports have a female connector, so I tried a straight cable,
first.
The straight cable shows some random and spurious characters.
But there's also a DB15 female port.
Do you know how to connect to this old beast?
I'm getting no answer just because the Quattro is not working or I'm
wrong somehow?
Thanks!
--
Vincenzo (aka Supervinx)
--==ooOoo==--
My computer collection:
http://www.supervinx.com/Retrocomputer
--==ooOoo==--
You can reach me at:
www.supervinx.comwww.facebook.com/supervinxhttp://www.youtube.com/user/supervinxhttp://www.myspace.com/supervinx
On Mon Jan 26 21:42:02 CST 2015, Jacob Ritorto wrote:
> I initially had, but mysteriously lost the console emulator/ODT
> functionality, seems it's starting at 165000 instead of 165200 at poweron.
> Maybe a 9312 switch mis-set... So I'm booting from the panel by calling
> the address of the ODT or the rl02 boot rom, which does the trick.
I think it's supposed to be at 165020.
Check switch-pack 1, and make sure that 7 is On.
I think the default for the switch-pack is:
1, 2, and 7 = On. Everything else = Off.
T
This has been floating around here for ages, and figured I should scan &
share it out before it's lost for good. It's two JPEGs inside a ZIP
archive; I was too lazy to merge them into a single image.
IBM Hardware & Software Price List - March 8th, 1983
Tried sending this to the list as an attachment, but it was too large. You
can download it here:
http://nerp.net/~legendre/greenkeys/IBM_Price_List_8-MAR-1983.zip
