Re: IBM XT 5160 Keyboard issues

On Sat, Dec 17, 2016 at 11:53 PM, Devin wrote: > Alright, thanks for the info. I think I'll start off with something in > the "cheap crap" category and see if i can find something better down the > line. Now that i know what to look for it probably won't take long to get > one that is of good q

Re: IBM XT 5160 Keyboard issues

Alright, thanks for the info. I think I'll start off with something in the "cheap crap" category and see if i can find something better down the line. Now that i know what to look for it probably won't take long to get one that is of good quality. --Devin On 12/18/2016 1:45 AM, Eric Smith

Re: IBM XT 5160 Keyboard issues

On Sat, Dec 17, 2016 at 11:02 PM, Fred Cisin wrote: > On Sat, 17 Dec 2016, Josh Dersch wrote: > >> Model M keyboards are AT-style keyboards, they won't work with an XT >> (different protocol). You will need to find a PC/XT compatible keyboard to >> use. >> > > exactly. > > The original IBM PC/XT

Re: IBM XT 5160 Keyboard issues

On Sat, 17 Dec 2016, Josh Dersch wrote: Model M keyboards are AT-style keyboards, they won't work with an XT (different protocol). You will need to find a PC/XT compatible keyboard to use. exactly. The original IBM PC/XT keyboard is a buckling spring. So, if/when you find one, it will at lea

Re: IBM XT 5160 Keyboard issues

On Sun, 18 Dec 2016, Devin wrote: I was happy to find a IBM XT for a good price at the scrapyard today in very nice condition. It is missing the hard drive, but i have plenty of those, the controller was still inside. If it is the real IBM (Xebec) hard disk controller, then it is strapped for

Re: IBM XT 5160 Keyboard issues

On 12/17/16 9:14 PM, Devin wrote: I was happy to find a IBM XT for a good price at the scrapyard today in very nice condition. It is missing the hard drive, but i have plenty of those, the controller was still inside. I had a little issue getting video working at first, i do not have a 9 pin

IBM XT 5160 Keyboard issues

I was happy to find a IBM XT for a good price at the scrapyard today in very nice condition. It is missing the hard drive, but i have plenty of those, the controller was still inside. I had a little issue getting video working at first, i do not have a 9 pin cga monitor laying around, thankful

Re: Odd "endianness" [was Re: RE: Base 64 posts to the list]

On 12/17/2016 05:50 PM, Eric Smith wrote: > > The TI TMS34010 and TMS34020 graphics processors were > bit-addressable, though instructions had to be 16-bit aligned. The > TMS34010 and the default mode of the TMS34020 were little-endian, > with bit 0 being the least significant bit. The TMS34020 h

Re: Odd "endianness" [was Re: RE: Base 64 posts to the list]

On Sat, Dec 17, 2016 at 2:59 PM, Chuck Guzis wrote: > What perplexed me is that the address of 0 0 specified the first > bit in byte 0 of word 0, but that same bit was the *high order* bit in > the corresponding byte and word. It would seem to make more sense > reversing the significance of

Re: Odd "endianness" [was Re: RE: Base 64 posts to the list]

Here's a tickler for the list... I've used bit-addressable machines, where individual bits were directly addressed without regard to their position within a byte or word. E.g., a system with 48 bit addresses, where the lower 3 bits of an address specified the bit within a byte; the next 3 specifi

Re: Mystery 8085-related IC identification needed please

On Sat, Dec 17, 2016 at 6:34 PM, Adrian Graham wrote: > On 17/12/2016 14:28, "Tony Duell" wrote: > >> On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham >> wrote: >>> >> >>> >>> Thanks all, the pinouts are matching the LS9x counters so I just need to >>> trace more lines to hopefully narrow it down.

Re: Rack-mounting a TU56 (Jay West)

> > Date: Fri, 16 Dec 2016 13:12:45 -0600 > From: "Jay West" > Subject: RE: Rack-mounting a TU56 > > Speaking of which - I'll put out a call again for if anyone wants to get a > group purchase on the motor run caps for a TU55/56 > > J > Yes please. -- Michael Thompson

Re: Mystery 8085-related IC identification needed please

It is most likely an off brown, marking a 1% and not violet. Sometimes their paints change with age. Dwight From: cctalk on behalf of Adrian Graham Sent: Saturday, December 17, 2016 10:34:01 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re:

Re: Mystery 8085-related IC identification needed please

On 17/12/2016 14:28, "Tony Duell" wrote: > On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham > wrote: >> > >> >> Thanks all, the pinouts are matching the LS9x counters so I just need to >> trace more lines to hopefully narrow it down. Pins 6 and 7 are definitely >> inputs so you're right Tony, t

Re: PDP-6s at MIT

I have nothing particularly useful to add to the history here, but just wanted to say how much I appreciate hearing about the MIT ITS machines. Around 1982, I was a 16-year old hacker living in suburban Maryland, running a CP/M BBS. I came across a text file titled something like ‘interesting ph

Re: heavy stuff -- was: Anyone want an RK11-C manual?

> From: Paul Koning > Disassembling the mechanics is quite another matter. The spindle and > head actuator assemblies are precision mechanisms with very tight > tolerances and alignment requirements. Oh, I wouldn't take out anything that would require precision realignment. (I wo

Re: Mystery 8085-related IC identification needed please

On 17/12/2016 14:28, Tony Duell wrote: On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham wrote: Thanks all, the pinouts are matching the LS9x counters so I just need to trace more lines to hopefully narrow it down. Pins 6 and 7 are definitely inputs so you're right Tony, the reset must come from

Re: PDP-6s at MIT

> I remember reading somewhere (it was decades ago, sorry, don't remember > the source) that AI's paging box was subtly different from the one on > DM; the AI one could IIRC, address 4 'moby's (a full PDP-10 address > spare), and two (I think? I'm pretty sure all the KA's had two mo

Re: Mystery 8085-related IC identification needed please

On Sat, Dec 17, 2016 at 2:02 PM, Adrian Graham wrote: > > > Thanks all, the pinouts are matching the LS9x counters so I just need to > trace more lines to hopefully narrow it down. Pins 6 and 7 are definitely > inputs so you're right Tony, the reset must come from elsewhere. One of the > outputs

Re: Mystery 8085-related IC identification needed please

On 16/12/2016 18:25, "Tony Duell" wrote: > On Fri, Dec 16, 2016 at 6:19 PM, Peter Coghlan > wrote: >>> >>> They aren't 'standard' 14-pin DIPs in that they don't follow the >>> GND-on-pin-7-Vcc-on-pin-14 layout. Pins 6 and 7 on both are wired together >>> (not to GND) and form the RESET signa

Re: PDP-6s at MIT

On 12/17/2016 08:14 AM, Noel Chiappa wrote: > I'm can't quite remember, although I'm pretty sure neither DM or ML had any > -11's. I thought I'd heard that the 10s were connected to the Chaosnet through 11s running MINITS.

Re: PDP-6s at MIT

> I suppose it's likely they both used the same master/slave > configuration. However, there's one thing I found that may indicate > that the DM machine went in an other direction. I think the latter may be true, I have this vague sense that the two DM machines were never interonnecte

Re: PDP-6s at MIT

Noel Chiappa wrote: > > I wonder how the AI PDP-6 was used back in the day. I suppose > > ITS development moved to the KA10 using the virtual memory > > pager, leaving the 6 behind. But it was still attached as a > > slave CPU, right? > > Yes. There is a document, "February 1972

RE: Rack-mounting a TU56

-Original Message- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Henk Gooijen Sent: Friday, December 16, 2016 3:03 PM To: cctalk@classiccmp.org Subject: RE: Rack-mounting a TU56 Van: Ethan Dicks Verzonden: vrijdag 16 december 2016 20:43 Aan:

Re: Rack-mounting a TU56

On Fri, December 16, 2016 20:30, Marc Howard wrote: > I replaced my motor caps with some that I found on Alibaba (or maybe > Aliexpress) a couple of years ago. They are the right diameter and height > and have wire leads instead of lugs. They're also made with yummy > vegatable > oil and seem to

RE: heavy stuff -- was: Anyone want an RK11-C manual?

Henk, Have you tried using a block and tackle to pull the drived up the stairs using the planks? Ed -- Ik email, dus ik besta. BTC : 1J5fajt8ptyZ2V1YURj3YJZhe5j3fJVSHN LTC : LP2WuEmYPbpWUBqMFGJfdm7pdHEW7fKvDz On Fri, December 16, 2016 21:23, Henk Gooijen wrote: > > > > Van: Tony Duell