Is it this kind? https://youtu.be/pk9lbLOksE8?si=ObI7qrTyf-vlP1iY&t=579
EIA standard tantalum chip capacitor? Needs more research. Hopefully these are the kind that don't leak.
Internet says dry tantalum caps don't leak as long as the "outer coating" is intact. It also seems like even if they are the wet kind, the electrolyte is actually retained inside unlike the cheap aluminum kind that I am replacing. I may try to check a few in circuit and not worry about it much further. Phew.
Posted from an IBM PS/2 Model 70
Re: Posted from an IBM PS/2 Model 70
Replaced the 3 aluminum electrolytic caps as planned. Seems to work fine and has had no further errors. It's been working pretty hard, too, as I installed Windows 95 and some other stuff.
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Re: Posted from an IBM PS/2 Model 70
More pics. Ended up installing IE 5 but it only supports 40 bit encryption so still not what I need. It does hit Google though.
Retrozilla had WAY too high of hardware requirements.
I also went down a rabbit hole because the filesystem is running MS-DOS compatibility mode. But I think the reason is because the ESDI system (and the MCA port it uses) is 16-bit. So the system is just too old for 32-bit hard drive stuff. Oh well.
Retrozilla had WAY too high of hardware requirements.
I also went down a rabbit hole because the filesystem is running MS-DOS compatibility mode. But I think the reason is because the ESDI system (and the MCA port it uses) is 16-bit. So the system is just too old for 32-bit hard drive stuff. Oh well.
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Re: Posted from an IBM PS/2 Model 70
Took a closer look at my NIC.
Turns out I have rev E of the old version of the PCB. Perhaps there is something wrong with my AUI adapter. Or maybe I should replace the three electrolytic caps...
https://www.ardent-tool.com/NIC/3c523.html
Then I found this:
https://www.ardent-tool.com/NIC/Ethernet_Bench.html
In theory the 3C523 is a decent card....
So I splurged and ordered TWO.
Card 1.
https://www.ebay.com/itm/232841819187
Olicom 2335 which is a 10/100 card though the link above says it is cheesy. I guess cheesy means ISA hardware barely adapted to MCA (therefore not taking advantage of anything). Also tiny buffers. I'll give it a whirl as it is reportedly the only MCA card capable of 100 Mbit. They tested it to about 24 MBit which is far short of 100 but I'll note is higher than 10.
https://www.ardent-tool.com/NIC/Olicom_OC2335.html
Card 2.
https://www.ebay.com/itm/205303434553?_ ... R9Sd7P6jZQ
IBM Lan Adapter/A
A 32 bit card that supposedly works in a 16 bit slot and that's the only free slot I have so it better. Like the Olicom it has on-board RJ45.
This card seems like quality hardware and also had some fast transfer rates with low CPU utilization. That's something. About 8.6 Mbit which is similar to my 3C523 but using almost half the CPU on a 486.
https://www.ardent-tool.com/NIC/LAN_A.html
We'll see how the machine and Win 95 likes these when I receive them. Just want a functional NIC (receive performance has always been unexplainably slow, even 21 years ago according to some archived e-mails I found).
https://www.ardent-tool.com/NIC/3c523.html
Then I found this:
https://www.ardent-tool.com/NIC/Ethernet_Bench.html
In theory the 3C523 is a decent card....
So I splurged and ordered TWO.
Card 1.
https://www.ebay.com/itm/232841819187
Olicom 2335 which is a 10/100 card though the link above says it is cheesy. I guess cheesy means ISA hardware barely adapted to MCA (therefore not taking advantage of anything). Also tiny buffers. I'll give it a whirl as it is reportedly the only MCA card capable of 100 Mbit. They tested it to about 24 MBit which is far short of 100 but I'll note is higher than 10.
https://www.ardent-tool.com/NIC/Olicom_OC2335.html
Card 2.
https://www.ebay.com/itm/205303434553?_ ... R9Sd7P6jZQ
IBM Lan Adapter/A
A 32 bit card that supposedly works in a 16 bit slot and that's the only free slot I have so it better. Like the Olicom it has on-board RJ45.
This card seems like quality hardware and also had some fast transfer rates with low CPU utilization. That's something. About 8.6 Mbit which is similar to my 3C523 but using almost half the CPU on a 486.
https://www.ardent-tool.com/NIC/LAN_A.html
We'll see how the machine and Win 95 likes these when I receive them. Just want a functional NIC (receive performance has always been unexplainably slow, even 21 years ago according to some archived e-mails I found).
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Re: Posted from an IBM PS/2 Model 70
So for the network I can just sell whatever I don't want to keep (including my old 3C523).
But I also ordered a "new" sound card.
https://texelec.com/product/resound-new-wave-mca/
This is on backorder so hopefully it is fulfilled at some point. Ordered it on 2/11 I think. I guess I may end up getting a NIC or two before the sound card. Also, these new cards will have to share the 16-bit slot as the two 32-bit slots are taken up by important stuff: XGA/2 card and RAM card.
Needs moar tower with more 32 bit slots. Then I could get a 32 bit SCSI card and have some performance for my file system. The Model 80 is the tower version and has many slots.
But I also ordered a "new" sound card.
https://texelec.com/product/resound-new-wave-mca/
This is on backorder so hopefully it is fulfilled at some point. Ordered it on 2/11 I think. I guess I may end up getting a NIC or two before the sound card. Also, these new cards will have to share the 16-bit slot as the two 32-bit slots are taken up by important stuff: XGA/2 card and RAM card.
Needs moar tower with more 32 bit slots. Then I could get a 32 bit SCSI card and have some performance for my file system. The Model 80 is the tower version and has many slots.