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Ti-990

zippysticks

Veteran Member
Joined
Nov 21, 2017
Messages
574
Location
UK, South East
Could somebody with a ti-990 system with a programmers panel take some pictures of the rear of the panel, i'm hoping it has some component designations on for the LED, it's not clear from the schematic if they are in the same order as they are on the panel.
I'm building a pcb for a replica programmers panel to connect to my 990/10A processor board.

Many thanks,

Jim
I have a panel - will try and get some pictures for you this weekend.
 

zippysticks

Veteran Member
Joined
Nov 21, 2017
Messages
574
Location
UK, South East
No silkscreen on the rear of the PCB, and this is the best shot I can shot without dismantling the PCB from the front panel. reluctant as I don't want to have to faff about aliging all the LED's and switches back up.



PXL_20230121_155033816.jpgPXL_20230121_154948522.jpg
 

Jim Hearne

Experienced Member
Joined
Aug 12, 2011
Messages
173
Location
Lincolnshire. UK
Thank you very much, that should do, since i have the schematic hopefully i can trace the tracks from the LED's back to the shift registers on the picture.
I only need to be able to trace a couple to confirm the led order.

I wouldn't expect you to take the PCB off.

Thanks again,

Jim
 

zippysticks

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Joined
Nov 21, 2017
Messages
574
Location
UK, South East
Let me know of you need anything else. I'm preparing to power this baby up tomorrow - at least for some large PSU cap forming for a few days.
A previous owner had cut off all the mains power cables and removed fuses - I'm hoping it was just a precaution before offloading the machine rather than a sign of something more sinister.
 

Jim Hearne

Experienced Member
Joined
Aug 12, 2011
Messages
173
Location
Lincolnshire. UK
Thank you, I have been able to follow enough tracks on the picture to confirm what i needed to know.
Despite the LED's being labelled (left to right) as Bit 8 to Bit 15 and then Bit 0 to Bit 7, that is the correct order.

Funny how they used 4 x 5 keypads (only using 2 rows) for the switches, i wonder if they were they same as there calculators.

Good luck with your power up.

Jim
 

zippysticks

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Joined
Nov 21, 2017
Messages
574
Location
UK, South East
Very nice - let us know how you get on.

Made some progress with my system at the weekend. I have managed to rewire the entire AC mains supply and it is now working - at least beyond the huge 240v->115v mains transformer, filters and to the AC power conversion board. Hope to get more time this weekend to get into the DC. Three 115V fans in the chassis are incredibly loud.
 

FarmerPotato

New Member
Joined
Oct 29, 2022
Messages
4
Location
Austin, TX
During the last days I collected a bunch of 8" diskettes for the TI-990 systems.

I listed the disks in the table below.

I try to get them imaged so that they can be made available via bitsavers - if they are not yet available and interesting enough.
So far I did only see different versions of some of the software on bitsavers.

Martin


TI 990
8 inch Diskettes
PrintoutPrintoutDisk LabelDisk LabelDisk LabelDisk LabelDisk Label
DISC I.D.911 AMPLTX 1.1.0 2250407-1601FS990 AMPL 911VDT SYSRELEASE 1.12250407-1601REF. MANUAL 2250408-9701 FOR INSTRUCTIONS
DISC I.D.CMDLIB AMPLTX 1.1.0 2250407-1603FS990 AMPL COMMAND LIBRELEASE 1.12250407-1603REF. MANUAL 2250408-9701 FOR INSTRUCTIONS
DISC I.D.AMPL 913 SYSTEM 939801-0001*CREV C AMPL 913 VDT SYSTEM (24K), AMPL UTILITY, PROCS AND SYS 913RELEASE 2.939801-0001REF. MANUAL 946244-9701 (24K OP GUIDE) AND 949621-9701 (TUTOTIAL) FOR OPERATING INSTRUCTIONS
DISC I.D.AMPL 913 SYSTEM 939801-0001*CREV C AMPL 913 VDT SYSTEM (24K), AMPL UTILITY, PROCS AND SYS 913RELEASE 2.939801-0001REF. MANUAL 946244-9701 (24K OP GUIDE) AND 949621-9701 (TUTOTIAL) FOR OPERATING INSTRUCTIONS
DISC I.D.AMPL 733 SYSTEM 939801-0002*CAMPL 733 ASR SYSTEM (16K)RELEASE 2.939801-0002REF. MANUAL 949620-9701 (16K OP GUIDE) FOR OPERATING INSTRUCTIONS
DISC I.D.-REV C. AMPL 911 VDT SYSTEM (24K) AMPL UTILITY, PROGS AND SYS911RELEASE 2939801-0003REF. MANUAL 946244-9701 (24K OP GUIDE) AND 949621-9701 (TUTOTIAL) FOR OPERATING INSTRUCTIONS
DISC I.D.TX990P 2250446-1601 *A V2.4TX990 PARTS (OBJECT) DISKETTERELEASE 2.3P/N 2250446-1601REF. TX990 OBJECT INSTALLATION MANUAL NO. 2261725-9701 OR TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.-913 VDT SYSTEM DISKETTE, TXDSRELEASE 2.3P/N 2250446-1602REF. TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.-733 ASR SYSTEM DISKETTE, TXDSRELEASE 2.3P/N 2250446-1603REF. TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.SYS911 2250446-1604 ** V2.3911 VDT SYSTEM DISKETTE, TXDSRELEASE 2.3P/N 2250446-1604REF. TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.TXDSUT 2250466-1605 ** V2.3TXDS UTILITIES DISKETTERELEASE 2.3P/N 2250446-1605REF. TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.TXDSLE 2250446-1606 ** V2.3TXDS LINK EDITOR DISKETTERELEASE 2.3P/N 2250446-1606REF. TXDS OBJECT INSTALLATION MANUAL NO. 2261731-9701
DISC I.D.AMPL 911 SYSTEM 939801-0003*CTX990 PARTS (OBJECT) DISKETTERELEASE 2.MP/N 2250446-1601REFERENCE TXDS INSTALLATION MANUAL NO. 2261725-9701 OR TXDS INSTALLATION NO. 2261731-9701
12.07.1979​
DISC I.D.TXDSUT 2250446-1605 *A V2.4TXDS UTILITIES DISKETTERELEASE 2.4P/N 2250446-1605REFERENCE TXDS INSTALLATION MANUAL NO. 2261731-9701
12.07.1979​
DISC I.D.TXDSLE 2250446-1606 *A V2.4TXDS LINK EDITOR DISKETTERELEASE 2.4P/N 2250446-1606REFERENCE TXDS INSTALLATION MANUAL NO. 2261731-970112.7.79, 12.6.79
DISC I.D.TXDSLE 2250446-1606 *A V2.4LINK EDITORV2.4handwritten label, copy
DISC I.D.TXDS FTN COMP+RTM REL.3.0TXDS FORTRAN RUNTIMERELEASE 3.00936136-1602 *CREF. MANUALS: 2261737-9701 TXDS FORTRAN INSTALLATION
DISC I.D.POWER BASIC DISC + EPROM COPYOPERATING SYSTEM SYS/AMP EDITORhandwritten label, copy
I am curious how you will go about capturing these images?

I discovered 8" floppies among my dad's papers. They contain backups of DX10 user directories.

I now have an SA850 floppy that needs power and interface. I hope to connect it to Kryoflux to get track images. The rest is software...
 

Martin Hepperle

Experienced Member
Joined
Nov 10, 2014
Messages
130
That was easy ... I sent the floppy disks to a friend who has an 8" disk drive and appropriate software.

This is still work in progress and I can report back in a week or so.

A Kryoflux or similar device sounds also very suitable for this purpose. The format seems to be IBM standard.
 

jbdigriz

Member
Joined
Feb 18, 2007
Messages
44
Here is my recreation of the programmers panel for use with the 990/10A pcbs.
It's not intended to be an exact copy, it's smaller and i have used SMT caps and resistors. But the circuit is 100% the same.
Just ordered some boards.
View attachment 1252109
Doh. Now I remember you posting this elsewhere. I think. Sorry I missed your request earlier, here, for photos of the original.
 

jbdigriz

Member
Joined
Feb 18, 2007
Messages
44
And here is the second TI-990.
Its a beast of a pedestal sized 19" rack mounted 13 slot chassis fitted with a 990/5 CPU card, TI FD1000 disk controller and 911 VDT interface. The keyboard is nice but not much use without the bespoke VDT terminal. One keycap missing - anyone happen to know what keyswitch type they are ?
View attachment 1251597
The schematics for the logic board of the display are online in the manual. Shouldn't be too hard to duplicate/modify for use with most any CRT. http://www.bitsavers.org/pdf/ti/terminal/crt/0945424-9701_911_Depot_Maintenance_Manual_197902.pdf.

Apparently there is more than one version of the keyboard, using different makes of switches. You'd have to open it up and look. I've never opened up the ones I'm supposed to have, but Cape Girardeau dude on Ebay has a picked-over 911 kbd he say is Hi-Tek/Stackpole.

Bright side, you do have both an asynch and a synchronous serial port on the CPU board. The former can be used to attach an RS-232 terminal.
 
Last edited:

acorn_1401

Experienced Member
Joined
Mar 1, 2023
Messages
101
Location
South UK
Let me know of you need anything else. I'm preparing to power this baby up tomorrow - at least for some large PSU cap forming for a few days.
A previous owner had cut off all the mains power cables and removed fuses - I'm hoping it was just a precaution before offloading the machine rather than a sign of something more sinister.
Were you able to power this up ok?
 

Jim Hearne

Experienced Member
Joined
Aug 12, 2011
Messages
173
Location
Lincolnshire. UK
Here is the real version of my programmers panel.
A couple of issues on the Issue 1 board, should be correct on the Issue 2 schematic which i've attached.
The circuit is an exact copy of the TI panel but it's laid out to no specific size as as the time i didn't have a chassis it needed to match.

Jim
 

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Jim Hearne

Experienced Member
Joined
Aug 12, 2011
Messages
173
Location
Lincolnshire. UK
That looks fantastic Jim.

By the way, with the plastic surround, my original panels bolt directly onto a standard 19" chassis

Thank you :)

I've now got a card cage / motherboard but it's not a genuine TI one, came from Richard Norman like my 990/10A card and is a bit narrower than 19"

I've now acquired a 990/5 processor card, a couple of TFDC cards, a 911 VDU card and a GPIB card so having fun going through them.

Does anybody know about connecting a gotek up to a TFDC card instead of a 8" drive ?

Jim
 
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