Re: Interfacing PDP 11/05 to VT 50

2015-12-01 20:58 GMT+01:00 Joseph Lang : > The current loop is actually "proper" . > There are 3 parts to current loop > 1) transmitter (switch) > 2) receiver (opto coupler in dec stuff) > 3) current source > > You will have problems if things don't match. An active

Re: Seattle free teletype??

Already says 'teletype machine is gone'... Mike On Wed, Dec 2, 2015 at 1:02 PM, Jason Howe wrote: > Check out the 3rd picture > > http://seattle.craigslist.org/skc/zip/5340655886.html > > > Someone go get this -- I'm stuck at work with no car at the moment > > > --Jason

Re: Interfacing PDP 11/05 to VT 50

On Tue, Dec 1, 2015 at 3:37 PM, Mattis Lind wrote: > ... should be passive... > The same goes for the VT1XX option on > the VT100 which had two switches which one could set. I have a couple of the VT1XX 20mA options, if anyone is looking. New in Box. -ethan

Seattle free teletype??

Check out the 3rd picture http://seattle.craigslist.org/skc/zip/5340655886.html Someone go get this -- I'm stuck at work with no car at the moment --Jason

Re: Oberon and the OberonStation (retro-style FPGA computing)

On 11/23/2015 7:28 PM, William Maddox wrote: The revived 2013 re-issue of Niklaus Wirth's Oberon system is a joy to behold. If you've never heard of Oberon before, it is a minimalistic education-oriented language and operating system designed after Wirth had taken a (second) sabattical at

RE: [multicians] Emacs humor

From: Johnny Billquist Sent: Tuesday, December 01, 2015 5:44 PM Thanks for chiming in, Johnny! Keeps me from having to do it. :-) > But, of course, Emacs was not developed on Lisp machines. TECO was a DEC > edtior/language, and Emacs came about on PDP-10 machines. I think > originally with

Re: [multicians] Emacs humor

On 12/1/2015 5:43 PM, Johnny Billquist wrote: Nice. But, of course, Emacs was not developed on Lisp machines. TECO was a DEC edtior/language, and Emacs came about on PDP-10 machines. I think originally with ITS, but it could also be ran on TOPS-20. About the cokebottle reference, here's

Re: [multicians] Emacs humor

This is a funny cartoon and subsequent discussion thread from the Multics discussion group about emacs. Names and personal info edited out due to archival by unknown parties of the list and that these folks might not want names and certainly not email addresses archived. Mentioning that

Re: Interfacing PDP 11/05 to VT 50

On Tue, Dec 1, 2015 at 11:55 AM, Paul Koning wrote: > I'm not sure I understand the question correctly. That article clearly > points out the 20 mA wires, and presumably that's where your ASR33 is > connected. The VT50 comes (according to the peripherals handbook) with

Re: Sector Interleave

> On Nov 30, 2015, at 8:39 PM, Johnny Billquist wrote: > > On 2015-12-01 02:19, Paul Koning wrote: >> >>> On Nov 30, 2015, at 8:12 PM, Johnny Billquist wrote: >>> >>> ... >>> DECtape never did interleaving that I know of. >> >> Sure it does. The DOS

Re: Interfacing PDP 11/05 to VT 50

> On Nov 30, 2015, at 9:14 PM, william degnan wrote: > > I have an 11/05 with ASR 33 for I/O. I am using the M9970 console card to > make the connection. I have loaded papertape BASIC into core (16K) and it > boots up from 000 000 to the TTY, I can type in programs, etc.

Re: Sector Interleave

On Tue, Dec 1, 2015 at 9:09 AM, Paul Koning wrote: > > > On Nov 30, 2015, at 8:39 PM, Johnny Billquist wrote: > > > > On 2015-12-01 02:19, Paul Koning wrote: > >> > >>> On Nov 30, 2015, at 8:12 PM, Johnny Billquist > wrote: > >>> >

Re: Sector Interleave

On Tue, 1 Dec 2015, Paul Koning wrote: On the subject of DECtape, and "keeping good track of things" -- DOS format DECtape has 510 bytes per tape block, the other two bytes are used as the link word. It's a bit like MSDOS FAT format (or CDC 6000 series, which did it 20 years earlier), but

RE: Interfacing PDP 11/05 to VT 50

> The VT50 comes (according to the peripherals handbook) with a standard 20 mA > interface, optional RS232 interface. So it sounds like it would be a matter > of finding > where the 20 mA connector on the VT50 is, and plugging into that. > > Interestingly enough, the VT52 is listed as

Re: Sector Interleave

On 2015-12-01 18:09, Paul Koning wrote: On Nov 30, 2015, at 8:39 PM, Johnny Billquist wrote: On 2015-12-01 02:19, Paul Koning wrote: On Nov 30, 2015, at 8:12 PM, Johnny Billquist wrote: ... DECtape never did interleaving that I know of. Sure it

Re: Interfacing PDP 11/05 to VT 50

On Tue, Dec 1, 2015 at 12:43 PM, Ethan Dicks wrote: > On Tue, Dec 1, 2015 at 11:55 AM, Paul Koning > wrote: > > I'm not sure I understand the question correctly. That article clearly > points out the 20 mA wires, and presumably that's where your

Re: Sector Interleave

On 2015-12-01 19:04, Johnny Billquist wrote: On 2015-12-01 18:09, Paul Koning wrote: I suppose it's possible to do something like interleaving where consecutive sector addresses are not physically adjacent on the media. Come to think of it, that's exactly what the MSCP RX50 controllers do,

Re: Purchased a Microvax 3800

On Tue, Dec 1, 2015 at 7:25 PM, devin davison wrote: > > I purchased a m7769 DSSI controller card online, so that is one more step > in the direction of getting the machine all together. Still waiting to find > the controller for the tape drive and a dssi hard drive, although

Re: Purchased a Microvax 3800

On Tue, Dec 1, 2015 at 7:25 PM, devin davison wrote: > > Just figured id post about it here, to show my progress twords getting it > running. > > http://postimg.org/gallery/fztxjqbe/ Another tip: If you haven't done so already, remove the CPU console panel and check to see

Re: Interfacing PDP 11/05 to VT 50

> On Dec 1, 2015, at 1:22 PM, william degnan wrote: > > ... > Sorry about the wording of my question. Thanks for the replies. I was > only able to get the VT50 to receive, I could not send. So I decided to > research the problem. I found the link above, the author of

Re: Interfacing PDP 11/05 to VT 50

The current loop is actually "proper" . There are 3 parts to current loop 1) transmitter (switch) 2) receiver (opto coupler in dec stuff) 3) current source You will have problems if things don't match. An active transmitter has to connect to a passive receiver. Passive transmitter to active

Re: Interfacing PDP 11/05 to VT 50

On Nov 30, 2015 9:14 PM, "william degnan" wrote: > > I have an 11/05 with ASR 33 for I/O. I am using the M9970 console card to make the connection. I have loaded papertape BASIC into core (16K) and it boots up from 000 000 to the TTY, I can type in programs, etc. > >

Interfacing PDP 11/05 to VT 50

I have an 11/05 with ASR 33 for I/O. I am using the M9970 console card to make the connection. I have loaded papertape BASIC into core (16K) and it boots up from 000 000 to the TTY, I can type in programs, etc. Question - I'd like to switch over to a VT 50 in 20ma mode. Not sure if this is

Re: "Bounce buffer" copyright [was Re: flash (or ide) storage for unibus 11?]

On 11/28/2015 3:41 PM, Mouse wrote: Love that term, "bounce buffer" (I wrote a whole package to support them in a packet switch I did) - I'm officially adopting it, right now! :-) Hey - anything that anyone writes is automatically copyrighted. I realize you...may have been less than entirely

Re: "Bounce buffer" copyright [was Re: flash (or ide) storage for unibus 11?]

On 2015-12-01 16:49, John Robertson wrote: On 11/28/2015 3:41 PM, Mouse wrote: Love that term, "bounce buffer" (I wrote a whole package to support them in a packet switch I did) - I'm officially adopting it, right now! :-) Hey - anything that anyone writes is automatically copyrighted. I