- TechToolsList - listserv.classicarcade.com

Notes on 9100 display - dimming away...
by John Robertson 02 Nov '02

02 Nov '02

I was looking at my display which had faded a lot recently and I noticed that it is a vacuum fluorescent tube. Now any of you in Pinball may remember that you can sometimes revive fluorescent display tubes by over-driving the filaments so they glow a dull red. Then I spent about 1/2 hour trying to find the pins. Finally on the schematic (Service Manual Figure 7-2 page 1 of 2) I noticed that in the upper right corner of the first page of the display schematic there was a circuit that looks like a bi-stable flip flop that is computer controlled and there were the six pins for the filaments. Then I looked at the back of my display to find the same pins and looking in the immediate area noticed that one of the two Zener diodes (surface mount) was missing. That was my problem! Found it lying in the bottom of the cabinet - must have knocked it off taking of/on the lid. Soldered it back on and the display returned to it's former usable brightness. There is a way to adjust the brightness as well. It is a setting - I think you have to use a sub program to get at it, but you can adjust it. I just forget how. Need to re-read the starter manual. When I find it I'll post it here. I have purchased a spare display tube for my 9100 though, I think it is a good investment for it's useful life extension. John :-#)# How to subscribe or unsubscribe from TTL To do either you send email to "MajorDomo(a)flippers.com" and in the body you state either "Subscribe techtoolslist" or "Unsubscribe techtoolslist", note that the Subject is "" (Blank)... FTP site is: ftp://ftp.flippers.com/TTL/

1 0

unknown uploads...
by John Robertson 01 Nov '02

01 Nov '02

If you send anything to ftp.flippers.com/incoming could you PLEASE include a tiny text file saying what the heck the files are? I have two right now: 820.489 and 939.773 - both are 101K in size but I have no idea what they are or where to stuff them... Thanks! John :-#)# How to subscribe or unsubscribe from TTL To do either you send email to "MajorDomo(a)flippers.com" and in the body you state either "Subscribe techtoolslist" or "Unsubscribe techtoolslist", note that the Subject is "" (Blank)... FTP site is: ftp://ftp.flippers.com/TTL/

1 0

ML4400
by John Robertson 31 Oct '02

31 Oct '02

I just picked up a 4400 and was wondering if anyone has a manual on the sucker? It works, and I'm trying to figure out which pods I can use from the 4100 (I have the 4100 <-> 4400 adapter). John :-#)#

1 1

Re: Tek 85xx development docs?
by Jeff N K Yeo 31 Oct '02

31 Oct '02

Hello, I used to work on one of these in the early 80's, targeted at the Z80. The system comes in 2 big boxes with a HSI "high speed link" between them. The bottom box which manages the 2 8" floppies was run by a DEC LSI-11. Yes, the floppies (if they still exist) can be duplicated (even the system disk) after you have booted into system (using the system disk). The console instructions was in some scaled down form of UNIX. The system I used was unreliable and cost a lot to fix. I have studied the internal circuitry and it seems to be an overly complicated ICE system (compared to the Zilog or the Intel Intellec system of the same genre). The company at which I worked eventually went belly up, and they junked the system. If you are trying to use it as an ICE, it may be better to look at the Microtek ICEs which are PC hosted. The only thing you lose out will be the "virtual IOs" function on the TEKxx. Hope this helps, Jeff At 04:49 PM 10/30/02 -0800, Tom McClintock wrote: >Anyone have any Tek 85xx development docs? I'm hoping >to get some big 8" floppies created on on of their >development stations read. FWIW, the discs in question >are double-sided. > >Should be interesting if the data can be read... > >Thanks, >tom

2 1

WTB: Fluke 9010A and pods
by Adam Courchesne 31 Oct '02

31 Oct '02

I'm looking to buy a Fluke 9010A with RS-232 option and pods (Z80 and 6502) Anybody interested in making a few bucks? -Adam _________________________________________________________________ Surf the Web without missing calls! Get MSN Broadband. http://resourcecenter.msn.com/access/plans/freeactivation.asp

1 0

Re: #### No info available for techtoolslist.
by John Robertson 31 Oct '02

31 Oct '02

1 0

Tek 85xx development docs?
by Tom McClintock 31 Oct '02

31 Oct '02

Anyone have any Tek 85xx development docs? I'm hoping to get some big 8" floppies created on on of their development stations read. FWIW, the discs in question are double-sided. Should be interesting if the data can be read... Thanks, tom

1 0

fluke 9010a with pole position 2
by sales＠htbsusa 30 Oct '02

30 Oct '02

1 0

WTD: Z8000 pod manual or schematics
by John Robertson 29 Oct '02

29 Oct '02

Anyone have the Z8000 pod manual? I'm looking for the schematics of the sucker. I suspect another pod might be able to be modified to be a Z8000... John :-#)#

3 3

Centipede and HP5004a
by SteveT 28 Oct '02

28 Oct '02

2 1