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| HP/Agilent 1675x logic analyzer card memory up-hack |
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| DogP:
I ended up grabbing that 16716A for the cables... though of course "upgraded" the card as well. So thanks for that info in this thread! Also, while sifting through this thread, I noticed the discussion about the 1674x -> 1675x, and noticed the subtle difference in what DocBen wrote. He says he converted the 16740A to 16752B. --- Quote from: DocBen on November 28, 2017, 05:49:08 pm ---So I have finally gotten around to try to get a 16740a to be a 16752b. --- End quote --- --- Quote from: Patrick.M on April 03, 2018, 06:31:54 pm ---I decided to move the resistors on my 16742A to that of a 16752A. The main frame reported an error trying to write to the FPGA. --- End quote --- --- Quote from: Patrick.M on April 06, 2018, 04:12:55 pm ---I saw absolutely, as I can be, no physical differences between the one 142A and three 152A PCBs. The only difference are subtle marking differences (suffixes) on the larg Xlinx chips. --- End quote --- So... given that it seems the difference between the 1675x A vs. B seems to be the XCV300 vs. XCV300E, and the above posts discuss unsuccessful upgrades from 1674xA to 1675xA, and note the FPGA differences, maybe the 1674xA is actually the same hardware as the 1675xB, not the 1675xA, and therefore needs to be jumpered for B to work correctly. I didn't find any high quality pics of a 1674xA board to check the markings on the Xilinx part, but probably worth checking if you're attempting this upgrade. Edit: Might also apply to the 16718A and 16719A (not sure which FPGA is used on those boards). DogP |
| gslick:
--- Quote from: DogP on February 19, 2022, 02:37:06 am ---I ended up grabbing that 16716A for the cables... though of course "upgraded" the card as well. So thanks for that info in this thread! Also, while sifting through this thread, I noticed the discussion about the 1674x -> 1675x, and noticed the subtle difference in what DocBen wrote. He says he converted the 16740A to 16752B. --- Quote from: DocBen on November 28, 2017, 05:49:08 pm ---So I have finally gotten around to try to get a 16740a to be a 16752b. --- End quote --- --- Quote from: Patrick.M on April 03, 2018, 06:31:54 pm ---I decided to move the resistors on my 16742A to that of a 16752A. The main frame reported an error trying to write to the FPGA. --- End quote --- --- Quote from: Patrick.M on April 06, 2018, 04:12:55 pm ---I saw absolutely, as I can be, no physical differences between the one 142A and three 152A PCBs. The only difference are subtle marking differences (suffixes) on the larg Xlinx chips. --- End quote --- So... given that it seems the difference between the 1675x A vs. B seems to be the XCV300 vs. XCV300E, and the above posts discuss unsuccessful upgrades from 1674xA to 1675xA, and note the FPGA differences, maybe the 1674xA is actually the same hardware as the 1675xB, not the 1675xA, and therefore needs to be jumpered for B to work correctly. I didn't find any high quality pics of a 1674xA board to check the markings on the Xilinx part, but probably worth checking if you're attempting this upgrade. DogP --- End quote --- Did the 16716A you picked up for parts for the cables turn out to be fully functional? Regarding the 1674xA FPGA, my 16741A has XCV300E parts. The ID resistors for that 16741A are as shown here (Reply #17 on: November 29, 2017, 12:53:27 am): https://www.eevblog.com/forum/testgear/hpagilent-1675x-logic-analyzer-card-memory-up-hack/msg1361817/#msg1361817 |
| DogP:
--- Quote from: gslick on February 20, 2022, 11:45:13 pm ---Did the 16716A you picked up for parts for the cables turn out to be fully functional? --- End quote --- Yes, with the exception of the missing interconnect cable. ;) --- Quote from: gslick on February 20, 2022, 11:45:13 pm ---Regarding the 1674xA FPGA, my 16741A has XCV300E parts. --- End quote --- Interesting... so yes, with the XCV300E, the 16741A would likely need to identify as a 16752B, not A. DogP |
| MarkL:
There was a thread that went into troubleshooting DogP's 16533A and 16750B cards. Just dropping the link here in case anyone is interested in the details (Glen...): https://www.eevblog.com/forum/repair/series-defect-on-agilent-167xx-boards/msg3989777/#msg3989777 |
| DogP:
Kinda "memory up-hack" related... I swapped out the 16702B's OEM SCSI hard drive with an ACARD AEC-7722 (firmware reflashed to AEC-7726, plus a 50-pin SCSI adapter - if not familiar, there's some discussion in this thread: https://www.eevblog.com/forum/microcontrollers/add-a-single-byte-in-a-bin-file-every-one-byte-(all-file)/ )... plus a 32GB CF card in a CF to IDE adapter. Overall, it dropped almost 30 seconds off the boot time (down to 2:46 from 3:13 with the OEM drive, with a pair of 16754A/Bs, a 16534A, and a 16720A), so quite a bit faster. An IDE SSD I tested was 8 seconds faster than that, but the CF card was more convenient to use. I know that there's also the SCSI2SD adapter, though from the benchmarks I've read, they're actually slower than an OEM drive. Anyway, in case anyone's interested, here's the bracket I used for mounting it in the 16702B: https://www.thingiverse.com/thing:5373974 . And note that not all 68-pin to 50-pin SCSI adapters work with the ACARD adapter... here's a design I made based on the HP 5182-4551 adapter which did work: https://github.com/pdaderko/16702B/tree/main/SCSI_50_to_68_female (soldered directly to the ACARD adapter). And I'm happy to say that I FINALLY have my 16702B back together and ready to use, for the first time since I bought it. I guess now I can retire my 16500A(s) and get back to work on the couple of RE projects that I wanted these faster/deeper memory cards for. :) DogP |
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