I'm updating a Wiki site for the Tektronix 1240 / 1241, and I need your help - Page 1
Forum section: electronics / testgear

author: bsb0011
author_rank: Contributor
timestamp: January 02, 2019, 07:25:43 pm
content: I've owned a Tektronix 1241 Logic Analyzer for some time now, and thought I had everything to work with various processors. Boy was I wrong!I started doing some online research, and found that information for the 1240 and the color version the 1241, seems to be scattered all over the web. I've slowly been collecting as much information on it as I can. Accessories, part numbers, ROM listings, manuals, and anything else I can find on it. It was my hope to collect everything, then make a web page to share everything.Then I stumbled on thehttp://w140.com/tekwiki/wiki/1240website. Not only did they have the service manual, they had a killer collection of ROMs for the 1240/1241 including "Mnemonics ROM Packs" for disassembling executed code. The list of ROMs is impressive, covering many other Tektronix products as well! However, I soon realized that some ROM Packs required additional resources to be able to do that. It was soon clear that different ROM packs also had to have specific input cards as well in order to have enough input channels.From my previous research, I had the answers to some of the missing information, but not all of it. So now I'm on a quest to collect as much information on the 1240 /1241 as I can, then add it to the tekwiki web page.I'm asking everyone that has any information, to please either post it below, or contact me. I'd love to help someone else out in making their 1240 / 1241 useful again! Thanks.

author: JFJ
author_rank: Regular Contributor
timestamp: January 02, 2019, 09:00:38 pm
content: The attached files are instructions for the following Mnemonic ROM packs:12RM01 (8080)12RM02 (8085)12RM04 (8088)12RM05 (80186)12RM41 (Z80)12RM99 (programmable for any processor)

author: bsb0011
author_rank: Contributor
timestamp: January 02, 2019, 11:56:00 pm
content: Thanks for those manuals!Here is a list of manuals I am looking for:Model StillNumber Need Description12R01 YES Performance Analysis12RC01 NO Line Printer Support12RC02 NO Master/Slave12RM01 NO 8080 Microprocessor Support12RM02 NO 8085 Microprocessor Support12RM03 YES 8086 Microprocessor Support12RM04 NO 8088 Microprocessor Support12RM05 NO 80186 Microprocessor Support12RM08 YES 80286 Microprocessor Support12RM21 YES 6800 Microprocessor Support12RM22 YES 6802 Microprocessor Support12RM23 YES 6808 Microprocessor Support12RM24 YES 6809 Microprocessor Support12RM25 YES 68000 Microprocessor Support12RM26 YES 68008 Microprocessor Support12RM27 YES 68010 Microprocessor Support12RM31 YES 68020 Microprocessor Support12RM33 YES 68030 Microprocessor Support12RM41 NO Z80 Microprocessor Support12RM42 YES Z8001/3 Microprocessor Support12RM43 YES Z8002/4 Microprocessor Support12RM62 YES 9450 (MIL-STD 1750A ) Microprocessor Support12RM63 YES 6502/65C02 Microprocessor Support12RM71 YES NSC800 Microprocessor Support12RM99 NO Option 01 GM ECM Microprocessor Support12RM99 NO Option 02 1802/4/5/6 Microprocessor Support12RM99 NO Option 03 8031/51 Microprocessor Support12RM99 NO Option 04 GPIB Bus Support12RM99 NO Option 05 6801 Microprocessor Support12RM99 NO Option 06 6805E2 Microprocessor Support12RM99 NO Option 07 6805E3 Microprocessor Support12RM99 NO Option 08 68HC11 Microprocessor Support12RM99 NO Option 09 6301/03 Microprocessor Support12RM99 NO Option 11 TMS32020/C25 Microprocessor Support12RM99 NO Option 12 64180R0/R1 Microprocessor Support12RM99 NO Option 13 VAXBI Bus Support12RM99 NO Option 14 TMS32010 Microprocessor Support12RM99 NO Option 15 DSP56000/1 Microprocessor Support12RM99 NO Option 16 8096/7 Microprocessor Support12RM99 NO Option 17 ADSP2100 Microprocessor SupportPM200 YES ?PM201 YES 8086/8088 Microprocessor Support ModulePM202 YES 80186/80188 Microprocessor Support modulePM203 YES 680xx Microprocessor Support ModulePM204 YES 80286 Microprocessor Support ModulePM205 YES ?Data Acquisition Probe P6460 010-6460-00 YESDiagnostic Lead Set 012-0556-00 YESOwners Manual YESService Manual YESMicroprocessor Analysis Workbook YES1240 Seminar Workbook YESTek Reference Guide YESIf you can contribute anything to this list of needed documents, I'm sure others in the community would appreciate you sharing them so they can added to the TekWiki web site.(I'll modify this list as documents come in to do my best to keep it current)

author: TerraHertz
author_rank: Super Contributor
timestamp: January 03, 2019, 01:23:20 am
content: What I should have done initially: go through the Tek catalogs I have.The 1240 was introduced in 1984 (1986 for 1241) and discontinued in 1993.Tek catalog mentions of the 1240/1241:1984: pg 70-74. 1985: pg 116-122. 1988: pg 118-121. 1989: pg 346-350. 1991: Barely. 1993 no mention.uP support tables that include 1240/1241:1984: pg 82, 1985: pg 122 (incl 12RMXX table.) 1988: pg 128. 1989: pg 320-322.These list the acquisition boards and probes required for each CPU.Hmm. Since the online Tek 1989 catalog is 318 MB, here are just the 3 relevant pages scanned:

author: JFJ
author_rank: Regular Contributor
timestamp: January 03, 2019, 09:37:16 am
content: Instructions for 12R01 Performance Analysis ROM pack:

author: TerraHertz
author_rank: Super Contributor
timestamp: January 09, 2019, 03:35:47 pm
content: Quote from: bsb0011 on January 02, 2019, 11:56:00 pmSo, the ones that you've found (that haven't been posted here), where are they?How's it going with adding them to Tekwiki? They should be linked to from the 1240 page.I uploaded a file of the character generator EPROM in the 1240, which wasn't already on Tekwiki.My user name there is Guykd.But I don't know how to add it to their list of all Tek EPROMS.Btw, all those PMxxx processor interface modules you mentioned, are for the Tek 1230 model. Not the 1240 or 41.Edit, to put this online: I am searching for a Tek 12RM63 6502/65C02 Rompack for the 1240. And manual.

author: bsb0011
author_rank: Contributor
timestamp: January 11, 2019, 04:23:46 am
content: Life has gotten in the way the last week or so, but I hope to post them this weekend.As far as the PMxxx modules, I believe that the PM1xx is for the 1230, and the PM2xx are for the 1240/1241. I know the 8086/8088 needs a separate module to take care of the memory prefetch and things like that, that the LA can't do on it's own (or at least that is what I have been told). From your catalog pages, for example, it says that for a 80186/80188 you need the PM200 Personality Support Module, option 02. Most other places simply call this the PM202 module.I scored a PM202 for $5, but sadly it did not come with the manual for it, so I am still looking for that.

author: helius
author_rank: Super Contributor
timestamp: January 11, 2019, 08:30:58 am
content: The 1241 is one of the rare instruments with an over-penetration color CRT display. That means that instead of a shadow mask or aperture grille to align separate electron beams with phosphor dots, there is only one electron beam, and the screen is coated with complete coverage of phosphor, like a monochrome display. However, there is a dielectric layer beneath the first phosphor, and beneath that a second phosphor of a different color. The color of text on the screen is controlled by varying the accelerating voltage!The w140 TekWiki mentions that the configuration battery is prone to leakage (after 30 years it would be, wouldn't it) but there is no information on the Internet about that cell type at all. It looks like a NiCad, but the wiki simply calls it "a potassium hydroxide electrolyte cell" and the picture is of a "Catalyst Research Corporation LP3236".

author: bsb0011
author_rank: Contributor
timestamp: January 11, 2019, 06:22:41 pm
content: Quote from: helius on January 11, 2019, 08:30:58 amBoth examples of the 64K RAM modules (12RS02), also contain the same battery. Unless someone can offer a reason not to, I am planning on putting a Lithium coin cell and holder in place of the original battery. I'm thinking something along the lines of a 2032. I am thinking of doing this on both the LA and both RAM modules I have.

author: helius
author_rank: Super Contributor
timestamp: January 11, 2019, 06:48:45 pm
content: Lithium coin cells are 3 - 3.6V, but NiCd and NiMH are 1.2V per cell. Some memory backup devices used three NiCd cells stacked in a single wrapper.The issue is that most lithium coin cells are primary non-rechargeable, and would be damaged by the equipment trying to charge them. A diode can be used to block current in the charging (- to + side) direction.

author: bsb0011
author_rank: Contributor
timestamp: January 19, 2019, 03:50:49 am
content: Sorry folks, due to some nasty flooding, and dealing with a basement full of water, I have not yet had the chance to upload any of my info to the TekWiki page. I know several of you have expressed interest in what I have been collecting. Hopefully I will be able to get my flooded basement issue taken care of, and get that information posted soon. Probably not this weekend however, as there is more rain predicted over the next few days.Thanks for your understanding.

author: Floopy
author_rank: Regular Contributor
timestamp: February 07, 2019, 06:52:51 pm
content: Hello, a bit late to the party.I came here because of thishttps://www.eevblog.com/forum/testgear/tektronix-1240-rom-pack-manual/msg2061346/#msg2061346Somehow I never noticed anyone replied. I want to thankJFJfor providing the PDF. I finally got it to work after that. Thanks!==Going back to this topic==I was actually looking for information on some of the Tektronix ROM packs and I ended up here. I uploaded the instructions on Tekwiki and I attached them to their corresponding page.bsb0011I hope that you won't hate me too bad for doing it. I just didn't know if you where going to or not. I hope you can type up the information you have sometime soon. There is a lot of information that I haven't uploaded yet.

author: bradg
author_rank: Newbie
timestamp: October 03, 2019, 06:29:44 pm
content: Sorry for bumping an old thread, but had some info to add that maybe a few may find useful.The original battery from Catalyst Research is a non-rechargeable 3V Lithium Iodide battery. There were at least two styles of battery installed in 1240/1241 units, one that looks like an oversized coin cell, and another that looks like an oversized crystal can. Speaking from experience, I can say that the oversized crystal can type battery is of extreme risk of leaking and destroying the A09 board (among other things if left too long - experience talking here).The battery in the analyzer (and almost certainly the PAK's too) can be replaced with a 3V coin cell without issue, there is no charging circuitry, and the battery is diode blocked to prevent accidental "charging". To make that more factory-like on the 3 analyzer chassis I recently serviced, I designed a small carrier PCB that matched the battery footprint on the A09 processor PCB, having a SMT CR2032 coin cell holder on it. I used my board router to produce the three I needed, but I just posted the full artwork and shared it on OSH Park if anyone wants to have some made (or download the artwork to fabricate it elsewhere). It is shared here -https://oshpark.com/shared_projects/oAsZEWxrand you can simply use a bit of wire or single pin headers to solder it to the processor board.To correct a bit of information earlier in the thread, the 1241 does not use a special CRT, it is a monochrome CRT with a color LCD shutter assembly (red and green filters) added in front of it, with a different CRT drive board and aluminum mounting panel, along with a different display driver board to support it. To the best of my knowledge, the rest of the hardware between the 1240 and 1241 is essentially the same, with firmware changes to the EPROMS on the A09 processor board to support monochrome vs. "color".Finally, a question - has a full manual for the 12RC01 parallel/serial support pack been made available for download somewhere? I haven't found it yet, but haven't done an exhaustive search yet either.Thanks to everyone for the wealth of information shared, and also feel free to pass along or share the battery retrofit board via the Tek 1240/1241 Wiki if you think it's worthy.Cheers!--Brad

author: komradebob
author_rank: Contributor
timestamp: November 25, 2022, 09:40:23 pm
content: I am also looking for the manual for the 12RM21 or, at the very least, the connections for the 5 control lines. The data and address lines are as follows:Sig Pod ChanC4 4 4C3 4 3C2 4 2C1 4 1C0 4 0A15 5 7A14 5 6A13 5 5A12 5 4A11 5 3A10 5 2A9 5 1A8 5 0A7 2 7A6 2 6A5 2 5A4 2 4A3 2 3A2 2 2A1 2 1A0 2 0D7 3 7D6 3 6D5 3 5D4 3 4D3 3 3D2 3 2D1 3 1D0 3 0