VOGONS


First post, by theseim

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Got my hands on a fsc d1219. It is an i815ep board, which theoretically also has an ISA slot.
The board has all the solder pads for it, unfortunately they are not populated. I would now like to start a small project to find all the components and populate the board.
Unfortunately, I can't find any pictures on the net that are high resolution enough to identify all the SMD components. Also, the chip used is usually difficult to recognize.
However, I believe that it is a National Semiconductor PC87200vul.

Does anyone here happen to have a fully assembled version of the board and can upload some high resolution pictures of the ISA section?
Or can you tell me which SMD components are missing here?

According to the picture I already know:
1:
TO-220: 7905C
2x cerco: ???
Tantal big: 107A
Tantal small: ???

2, 3, 4, 5:
???

6:
PC87200vul (presumably)
5x SMD 603: ???

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Reply 1 of 4, by PcBytes

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I only managed to find as far as circle one, so here is the info I found, pieced together from what little photos I could gather from google.

TO-220 is a MC7905CD2T
SMD capacitor below it - probably decoupling cap so I guess you can use any that fits that size
Tantalum next to TO-220 - 106E
Tantalum below the TO-220 is 107 10V
Resistor arrays seem to be unmarked so I guess you could reference most of it from a standard i815 mainboard that is not FSC and has a ISA slot
IC is indeed a PC87200VUL

Good luck with the other parts. This is as much as I could piece together for it, from as little as I could find.

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Reply 2 of 4, by shevalier

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theseim wrote on 2023-04-20, 09:25:

Or can you tell me which SMD components are missing here?

https://www.ebay.com/itm/125827154420
https://www.ebay.com/itm/225360868325
See pic of this lot

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Reply 3 of 4, by theseim

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Thank you guys!
I also got some other pictures from Ebay sellers and was able to identify all the parts.
For those who are interested, here is the complete list, from left to right:

1:
TO-220: 7905C
2x Ceramic: 100pF
tantal big: 100uF 10V (107A)
tantal small: 10uF 25V (106E)

2:
ceramic: 100pF
3x resistor array 4,7k
ceramic: 100pF
resistor: 1k
resistor: 330
resistor array 4,7k

3:
2x resistor array 4,7k
resistor array 330

4:
4x resistor array 4,7k

5:
resistor: 330
resistor array 4,7k

6:
PC87200vul
top: ceramic 100pF
left: resistor 220, ceramic 100pF
right: resistor 220, ceramic 100pF
bottom: ceramic 100pF

Reply 4 of 4, by theseim

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In the hope that someone here can help me, I will bring this thread back to life.

Unfortunately, more components seem to be missing. As far as described above, everything worked perfectly. However, data lines of the PCI bus are too connected to the ISA bridge chip.
So far so good. However, these are connected by two resistor arrays and I have no idea what values these must have.
In all the pictures I could find online, the arrays are not clearly visible enough to be able to read the numbers on them.

I have marked them here in the picture.
They seem to set simply between the data lines from the PCI bus and the chip, so I rule out pullup or pulldown resistors.

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