> From: Seth Morabito
> Well now I have egg on my face...
Don't worry, you're not the only one... :-)
> No, actually it DOES work.
Wow. Live and learn.
Or maybe actually DMA indeed _doesn't_ work with the CPU stopped, and what
happened was that the DMA request was waiting in the card, and as soon as the
processor started, it did the DMA? But how did the first instruction fetch
produce a valid instruction? Unless the first DMA cycle (to 01000) happened
before the processor fetched the first instruction?
I'll have to try throwing a 'scope on a QBUS and manually (via ODT) starting
a DMA transfer, with the CPU halted... see what (if anything) happens.
I have a few 5.25 floppies, about 4, that I would really like to have
imaged. I *think* that they are OS-9 (Microware not Apple) format. I
don't have a way to do it my self. Is there anyone out there who could
> However, with the Atari 400 and 800 and the Exidy sorceror, the BASIC ROM
> module was, IIRC, included with the
> machine in the standard configuration (i.e. if you bought an off-the-shelf
> boxed version of one of those, you
> got a BASIC module). Is that really any different from having the ROMs
> to the main PCB?
My Sorcerer came with the BASIC cartridge supplied as standard as did the
one a colleague got. I also recall that this was the standard offering.
>I just received my first IBM mainframe. It's an IBM Multiprise 3000
>model 7060-H30. It's a a P/390 class machine. It has 6 18GB drives and
>3 9 GB drives. I'll be posting some pictures on my website soon.
I was watching that also on ebay. Almost went for it. Almost. :) I am glad
it went to a good home.
(Still in SBC mode..)
I'm feeling a need for one of the Heathkit ETA-3400 memory & I/O expansion
units for my ET-3400.. or at least a set of documentation such as could be
used to build one of my own.
Anybody have an ETA-3400 they'd be willing to part with..? A set of docs in
As it sits, all I've got here is a copy of the ET-3400 'Modification
Manual' which details the changes which must be made to the ET so it will
connect to the ETA module.
Thanks for any assistance..
related to the recent posts on the GE TermiNet 300, I uploaded my scanned TermiNet documents to the bitsavers ftp-server maintained by Al. Hoewever, while going through the docs, I realized that these are for the later line printer models 310, 320, 330, 340, and not for model 300, apologies for potentially created hopes and confusions. But in any way, adding these to the documents list cannot harm :)
Pierre's collection of classic computers moved to: http://www.digitalheritage.de
I was recently given a load of QBUS stuff, and among the cards is a TD
Systems TDL-11. I can't find a scrap of information about it anywhere.
I have reason to believe it's a SCSI controller that emulates RL01
drives, based on its similarity to the TDL-12, which is documented
Since I can't find a manual for it, I have absolutely no idea how to
set its jumpers or activate its diagnostic monitor (if there even is
one). Just to see if it would work, I tried following the instructions
to get into the TDL-12's monitor, but they don't work on the TDL-11.
Has anyone seen this card in the wild, or can anyone point me at
a manual for it?
A poor photo of my card is here, for reference (200K):