Re: information about the Bendix G-15 and Rice Research Computer?

2015-09-12 Thread Jon Elson
On 09/12/2015 12:58 AM, Randy Dawson wrote: Yep, that was the place - I can't remember their name, I think they were the Autocad rep, and carried a few complementary lines like plotters. The R1 was laying down on some stands, like a coffee table, plexi cover so you could set your drinks on it

Re: information about the Bendix G-15 and Rice Research Computer?

2015-09-12 Thread Mark Linimon
On Sat, Sep 12, 2015 at 12:22:50PM -0500, Jon Elson wrote: > Any pictures of this? I'll forward this email to my contact at Rice. mcl

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics SR settings?)

2015-09-12 Thread Charles
Update: The first thing I tried was removing and reseating the boot ROMs (465A2/469A2), since they did not use good machine-tooled sockets. Now the boot loader performs normally, no incorrect locations, and OS/8 boots from Drive 0 whether using the boot key or manual start at 0001. Great! So

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics SR settings?)

2015-09-12 Thread Johnny Billquist
On 2015-09-12 17:23, Charles wrote: Since the computer doesn't mind doing boring, repetitive tasks, I set the 11/23+ to yet again remaking the bootable RL02 pack (3 hrs at 9600 baud while I did other things). Plunked it in (without the programmer's panel connected), hit the boot switch on the

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics SR settings?)

2015-09-12 Thread Charles
As previously posted, reseating the boot ROMs in their sockets cured the corrupted boot loader issue. Got lucky there :) In my system there are two RL02 drives. I will call them "Top" and "Bottom" here, after their physical locations. I put the OS/8 pack that had been acting strangely in the

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics

2015-09-12 Thread jwsmobile
On 9/12/2015 10:08 AM, Charles wrote: So, either something is corrupting the bus, or the memory is bad. Correct me if I'm wrong, but if I got this right, you wrote the boot code by hand into memory, single-stepped it, and after a while, you had bad contents in memory. Now, execution here

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics

2015-09-12 Thread Charles
So, either something is corrupting the bus, or the memory is bad. Correct me if I'm wrong, but if I got this right, you wrote the boot code by hand into memory, single-stepped it, and after a while, you had bad contents in memory. Now, execution here would only be reading from memory, and not

Re: Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics SR settings?)

2015-09-12 Thread Rick Murphy
At 12:31 PM 9/12/2015, Charles wrote: Update: The first thing I tried was removing and reseating the boot ROMs (465A2/469A2), since they did not use good machine-tooled sockets. Now the boot loader performs normally, no incorrect locations, and OS/8 boots from Drive 0 whether using the boot key

Re: Control Data 160

2015-09-12 Thread Billy Pettit
"wmachacek" wrote: Subject: Control Data 160 I have a CDC "160 Computer Programming Manual" that I obtained many years ago when I was working with CDC equipment. This manual caught my eye and I squirreled it away since we were using the 160-A computers not the 160s. This

C-64 / Epyx FastLoad bug(s)? Workaround?

2015-09-12 Thread drlegendre .
Anyone here using (or have used) a C-64 with the venerable Epyx FastLoad cartridge? I'm running into a VERY annoying bug, and would like to know what if anything is known about it. Bug works like this.. Use the FL "$" command to display the disk directory. Immediately after, try to save a

Re: Control Data 160

2015-09-12 Thread Mark Linimon
excellent post. mcl

WTB: Teletype parts

2015-09-12 Thread drlegendre .
Need the following items for an ex-Bell System Model 15 TTY: Keycaps - F K L C V B N with punctuation symbols, rather than fractions. I have a set with fractions to sell or swap. Keycaps - CARR RET and NULL (blank). These are missing. Platen crank - This is missing. Think that's all for

Re: 21MX proms (per request

2015-09-12 Thread Eric Smith
On Fri, Sep 11, 2015 at 12:41 PM, GerardCJAT wrote: > HOW OFTEN theses old PROM fail ?? Note that some bipolar PROMs suffer from fuse regrowth, where bits that have been programmed gradually revert to an unprogrammed state. This was a big problem with NiCr fuses. Later

Re: bendix GE-15?

2015-09-12 Thread Mark Linimon
On Fri, Sep 11, 2015 at 12:59:01PM -0700, W2HX wrote: > Some items that might be of interest > http://www.ebay.com/itm/Rare-Vintage-Bendix-G-15-Mainframe-Computer-Circuit-Board-Tester-/262042248871?hash=item3d02ef66a7 Yes, it would be, but not at that price. Ouch :-) mcl

Re: punchcard svg file available

2015-09-12 Thread simon
Hi, Hmm. russian carsds. sounds interesting. I'm certainly interested in their looks. could you post a scan of one of them? On 12-09-15 10:36, GerardCJAT wrote: Shall I understand that some of you guys, are looking for blank punch/punched cards ?? I have about a hundred ( here in

Even more PDP-8/A weirdness (was: Re: PDP-8 diagnostics SR settings?)

2015-09-12 Thread Charles
Since the computer doesn't mind doing boring, repetitive tasks, I set the 11/23+ to yet again remaking the bootable RL02 pack (3 hrs at 9600 baud while I did other things). Plunked it in (without the programmer's panel connected), hit the boot switch on the limited function panel, and it fired