Products > Test Equipment
My poor mans SMU - The Agilent 66311B
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gslick:

--- Quote from: TheSteve on February 21, 2016, 11:06:58 pm ---
--- Quote from: gslick on February 21, 2016, 09:33:00 pm ---
--- Quote from: TheSteve on February 21, 2016, 06:49:49 pm ---The firmware should be compatible with your model. Have you checked to see what part number the ROM is? If it's compatible with a programmer/socket I have I can dump it. I read the eeprom in circuit with a UPA-USB programmer using an SOIC clip. I don't think I'd program it in circuit though unless the processor was held in reset.

--- End quote ---

The A2 board block diagram in the service manual shows it as a 4Mbit 256Kx16 part and it is an AMD part in a 44-pin PLCC package so that should make it an Am27C4096 on the 5064-0088 version of the A2 board in my 66309D. I haven't gone back to peel off the firmware version part number sticker on the OTP EPROM yet to verify that is the actual part number.



-Glen

--- End quote ---

Well I'm happy to give it a go if you can get me an actual part #.

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I double checked and I was not correct the first time. The A.02.02 firmware I have in my 66309D is actually in an AMD Am27C2048-120JC part. That is a 2Mbit (131,072 x 16) OTP EPROM in a 44-pin PLCC package.  Manufacturer Code 01H, Device Code 98H.

Version A.02.02 firmware binary dumped from my 66309D attached in the .ZIP file here.

TheSteve:
I should be able to dump 02.04 shortly. I have a DIP40 to PLCC44 adapter that I got with my TL866CS programmer however the pin conversion is not quite correct for a 27C2048. The NC pins are connected where Vss needs to be.
Muxr:

--- Quote from: GAD on February 21, 2016, 06:22:43 pm ---
--- Quote from: Muxr on February 21, 2016, 01:07:56 am ---Mine arrived a few days ago. No knob, but it had a sticker on it which said "working". I opened it up anyways. Looked good. Fired it up and it appears to be working. Can't really test it until my connector arrives in a few days.

The VFD is good on it, not dim. The fan is loud, will need modding.



In either case, very happy with the score, thanks TheSteve!

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Yours looks positively new compared to mine. Anyone else receive one that looks as bad as mine?

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Your image may make it a bit worse than it really is, because you got a lot of lighting in that picture. Mine looks much better than my Keithley 2015 which needs a new VFD, and it doesn't look very warn but my image is also in relative dark (btw I prefer working in the dark with just spotlights, can't stand glare on the screens)
TheSteve:
This is firmware version A.02.04 as dumped from my 66311B. In the init menu it lets me choose 63311B, 63311D, 66309B or 66309D so those models should be supported by it.

For anyone wanting to dump it with a TL866CS/TL866A programmer two jumpers need to be added to the DIP40 to PLCC44 adapter board to connect the Vss pins. I jumpered PLCC pins 12 to 13 and 33 to 34 on the adapter board. My 66311B uses an Atmel AT27C2048 with chip ID 001E 00F7.

As far condition of my unit the front has some small dents and marks. I removed several stickers from the front as well. The back plastic bezel is cracked but holds together and the chassis itself has had paint scraped off in a few places. I am thinking my VFD is probably 75% as bright as when new.
gslick:
Cool, thanks for taking the time to dump the A.02.04 firmware.  AMD Am27C2048 parts are no longer available new but Mouser has the Atmel AT27C2048 in stock for around $4 each. I'll have to pick up some blank parts and give the A.02.04 firmware a try.

I do see the COUPLE:OUTPUT string in the A.02.04 firmware binary which isn't present in the A.02.02 firmware binary. That is consistent with the User's Guide part number 5964-8125. Of course that doesn't make any difference in the single output 66311B/D models.

Also I noticed "PEEK" and "POKE" strings in the firmware binary. I wonder if those could be used to read and write the cal/config 93C86 EEPROM? I'll have to try to experiment with that.
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