test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

by mcguire＠neurotica.com

On January 22, Tony Duell wrote: > > You wouldn't have any data on what, exactly, the voltages and timing for the > > 1702A would be, would you? > > If he doesn't, then I have the Intel 1702A data sheets and schematics for > their programmer, as used in the MCS8I (I think that's for the 1702A, not > the 1702, but I would have to check). I also have schematics, etc for at > least one DIY 1702A programmer (the PE CHAMP-PROG, FWIW). > > Be warned these are not friendly chips to program. Several of the pins > have to be raised to 40V-ish voltage levels.... A -47V programming pulse comes to mind, in particular... -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 11 months

UK Teleprinter Seminar (fwd)

by jpl15＠panix.com

Forwarded for the possible interest of UK and European Classiccmpers: ---------- Forwarded message ---------- Date: Wed, 23 Jan 2002 07:51:26 +0800 From: Larry Rice <oseagram(a)iprimus.com.au> Reply-To: greenkeys(a)mailman.qth.net To: greenkeys(a)mailman.qth.net Subject: [GreenKeys] Teleprinter seminar Got this from uk.radio.amateur - wish it was a bit closer... A Mechanical Teleprinter Seminar is being held at 1030 on Sunday 17th February 2002 at HMS Collingwood Communication and Radar Museum, Lee on Solent Road south of Fareham Hampshire after leaving the M27 at junction 11. Tour the Museum after. If you are interested places are to be booked in advance through Andrew Sinclair G0AMS Tel No 01329 235397. Or E:Mail to parr(a)athene.co.uk All requests for places must be made by Friday 15th Feb http://www.recelectronics.demon.co.uk/collingrad.htm Rgds Larry oseagram(a)iprimus.com.au _______________________________________________ GreenKeys mailing list GreenKeys(a)mailman.qth.net http://mailman.qth.net/mailman/listinfo/greenkeys

22 years, 11 months

PPro (was: RE: Need manual URL/hardcopy for HP Netserver LX Pro 6/200 serve)

by ken＠seefried.com

From: "wizard" > PS: Still not conviced that PPro is "worthy" CPUs. I view it as > "bastard child" of PII, celeron is even worse. Excuse me? Considering the PPro is significantly older than the PII, it would be hard for it to be the child. Further...the PPro has faster cache (clock == core, as opposed to clock == 1/2 core on PII) and on some versions more cache than the PII (up to 1MB). Clock for clock, the PPro is a better chip than the PII, it simply never got clocked up as high as the PII (for a number of mostly economic reasons).

22 years, 11 months

Security bits

by paul＠wccnet.org

I purchased a 33 piece security bit set from Radio Shack for $8 last May. They had to order it and it cost me $2.50 more for delivery. I just checked www.radioshack.com and I found it for $13 in the tools section (catalog number 910-5247). The URL is http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=C… Paul R. Santa-Maria Monroe, Michigan USA

22 years, 11 months

Toshiba T250 & moving files

by djg＠drs-esg.com

I got this and can't really help. From what I understand if you assist him so he can get the files off then he is willing to give the machine. Sorry, didn't think until now to ask where he lives. Reply to address in message below. -------- Original Message ----------- From: "Dave Bradshaw" <dave(a)fishmonger.com> I own a Toshiba T250 CPM PC that is around 17 years old. It is in excellent condition, and fully operational. It has 2 8 inch floppy diskette drives. The disk drives are high capacity, and the floppies contain 1MB of data. I have a lot of text data that I would like to move to a Windows based system. I'm looking either for an 8 inch drive that I can connect to a Windows PC, or another solution. I have never been able to locate a communications application that will wild card the file transfers, making the job way to ponderous to do one file at a time. There are literally thousands of small files. Do you know of an 8 inch drive that is compatible with a Windows PC and my high capacity 8 inch floppies. Also, if you are interested in my machine I am more than willing to part with it after I move all the data. -------- Original Message ----------- I pointed him to http://www.cpmspectre.pwp.blueyonder.co.uk/cpm/cpm_faq.htm#q14 http://www.cpmspectre.pwp.blueyonder.co.uk/ and classiccmp. David Gesswein http://www.pdp8.net/ -- Run an old computer with blinkenlights.

22 years, 11 months

Info needed on 1702A programmer

by pete＠dunnington.u-net.com

On Jan 22, 15:23, Richard Erlacher wrote: > You wouldn't have any data on what, exactly, the voltages and timing for the > 1702A would be, would you? This is from the Intel Data Catalog 1976: t(ACH) :<----- t(ACW) ------>: :<-->: 0V ___ :_____________________:__:_ :_______________________ _ ADDRESS \ / binary complement : : \ /: address of word \ / X of address t.b.p. : : X : to be programmed X -40 to 48V ___/ \_____________________:__:_/ \:_______________________/ \_ : : : : : : : : : : : t(VD)-->: :<--: 0V ___________________________: : : : :___:______ pulsed V(DD) \ : : : / : power supply :\ : : : /: : -46 to -48V : \:____:______________:__/ : : : : : : : : : : : : : : : : : -->: :<--- : : : 0V ___________________________: : : : t(ATW) : :___:______ pulsed V(GG) \ : : : / : power supply :\ : : : /: : -35 to -40V \:________:__________:__/ : : : : : t(VW)--->: :<-- : : : : -->: t(ATH) :<--- 0V _____________________________________ : : ______:_______ pulsed V(GG) \ :<-t(PW)-->: / power supply \: :/ -35 to -40V \__________/ : : : t(DW)---->: :<-- -->: :<---t(DH) : : : : 0V _______________________________ :___________________: ________ DATA data can \ /: :\ / data can change X : data stable : X change -46 to 48V _______________________________/ \:___________________:/ \__________ : : min typ max t(PW) Program Pulse Width 2ms 3ms V(GG)=-35V V(DD)=V(PROG)=-48V t(DW) Data Set-Up Time 25mms t(DH) Data Hold Time 10mms t(VW) V(DD), V(GG) Set-Up Time 100mms t(VD) V(DD), V(GG) Hold Time 10mms 100mms t(ACW) Addr.Compl. Set-Up Time 25mms t(ACH) Addr.Compl. Hold Time 25mms t(ATW) Addr.True Set-Up Time 10mms t(ATH) Addr.True Hold Time 10mms "mms" = microseconds. Input rise/fall times =< 1mms Ambient temp 25C Vcc = 0V Vbb = +12V +/- 10% /CS = 0V PROGRAMMING INFORMATION: 1702A and 1702AL family. Initially all 2048 bits of the PROM are in the '0' state (outpiut low). Information is introduced by selectively programming '1's (output high) in the proper bit locations. All 8 address bits must be in the binary complement state when pulsed Vdd and Vgg move to their negative levels. The addresses must be held in their binary complement state for a minimum of 25 microsec after Vdd and Vgg have moved to their negative levels. The addresses must then make the transition to their true state a minimum of 10 microsec before the program pulse is applied. The addresses shouyld be programmed in the sequence 0 through 255 for a minimum of 32 times. The eight output terminals are used as data inputs to determine the information pattern in the eight bits of each word. A low data level (-48V) will program a '1' and a high data input (0V) will program a '0'. All eight bits of one word are programmed simultaneously by setting the desired bit information patterns on the data input terminals. During the programming, Vgg, Vdd, and the Program Puilse are pulsed signals. See page 2 of the data sheet for required pin connections during programming. Pin Name Read Program 12 Vcc Vcc GND 13 Program Vcc Prog.Pulse 14 /CS GND GND 15 Vbb Vcc Vbb 16 Vgg Vgg Pulsed Vgg 22 Vcc Vcc GND 23 Vcc Vcc GND 24 Vdd Vdd Pulsed Vdd -- Pete Peter Turnbull Network Manager University of York

22 years, 11 months

[A bit long] Stuff for sale...

by mcguire＠neurotica.com

On January 22, Tothwolf wrote: > > > That explains it. I also have some Black Box brand units that look similar > > > but have an F type coax connector on them instead of a terminal block. > > > Any idea what they might be intended for? > > > > A short-haul modem of some sort? > > Your guess is as good as mine. I ended up with another similar looking > unit still NIB, but the guy who gave it to me peeled the stickers off the > bottom of the thing as a "joke"...I don't even know who made it or what > it's for now. A "joke"?? Wow, that guy has a great sense of humor. I can hardly stop laughing. Heh. Heh. I can hardly contain myself. Heh. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 11 months

5.25in. Floppies

by SUPRDAVE＠aol.com

In a message dated 1/22/02 5:11:29 PM Eastern Standard Time, mythtech(a)Mac.com writes: << > Is it just me, or is there something not-so-subtly ironic and >gratifying about a 450mHz desktop with a working 5.25 floppy drive >installed? my 750mhz Athlon has a 3.5/5.25 combo drive in it (both drives in a single half height 5.25 case). I don't think I have used the 5.25 half... but I put it in "just in case". -chris >> I just put a Teac 5.25 in my AMD 1200. Win2k picked right up on it. I install 5.25 floppies on all my modern machines since older ones use the same size. I recently lucked out and found some electronic eject 5.25 drives that fit perfectly in my PS/2 95 servers. Pretty cool to have a computer that can natively support 3 floppy drives. old computers, old cars and sundry items www.nothingtodo.org

22 years, 11 months

[A bit long] Stuff for sale...

by mcguire＠neurotica.com

On January 22, Tothwolf wrote: > That explains it. I also have some Black Box brand units that look similar > but have an F type coax connector on them instead of a terminal block. > Any idea what they might be intended for? A short-haul modem of some sort? -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 11 months

[A bit long] Stuff for sale...

by mcguire＠neurotica.com

On January 22, Tothwolf wrote: > > - Black Box 232/CL-E RS232 to Current Loop adapter -- modem-sized box > > What are these for? I've got two or three of these units on a shelf behind > some boxes. Uhh, they convert RS232 to a current-loop interface? :) PDP8, early PDP11, and lots of other systems used 20mA (and other) current-loop interfaces before +-15V RS232 came into vogue. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 11 months

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test-drb January 2002