On Wed, Dec 30, 2020 at 2:07 AM Ethan Dicks <[email protected]> wrote:
> On Tue, Dec 29, 2020 at 8:23 PM Josh Dersch via cctalk > <[email protected]> wrote: > > A straight TI 980 (not one of the later 980A or 980B variants) appeared > on > > my doorstep this afternoon. > > Interesting. Unfortunately, I have no docs (outside of what's on > Bitsavers). > > Mine is the later 980A variety, FWIW, with fat TI4060 DRAMs not core. > I only recently got a console key for it. > > > (Anyone have any spare parts? The core memory boards & chassis are > labeled > > well enough for me to see that I'm missing one of the "DA" boards...) > > The only spare parts would be some memory boards. I'll have to pull > them out and check them, but definitely DRAM and I think 8K or 24K > capacity, and I have no idea if they work on all variants or just > specific models. No spare I/O or CPU boards. > I'd be interested to see pictures of the card cages. I know what a 980B looks like and it's a significant revision from the 980 I have here -- the CPU is condensed from 13 or 14 boards down to four or so. I haven't been able to find a picture of the 980A's insides, curious to know how it differs. > > I was just glancing over at the docs on Bitsavers to see what it might > take to write a memory tester to toggle in. Nothing exhaustive just > simple write-read-compare testing. I know nothing of the architecture > so even that would take me a bit to figure out. > > http://www.bitsavers.org/pdf/ti/980/ Somewhere I have a couple of very short programs I hand-assembled to test out my 980B, I'll see if I can't dig them up... I suspect I left them on my old laptop. Thanks, - Josh > > > -ethan >
