Re: Bought these (retro) hardware today

Posted on 2021-05-30, 19:10

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[...] I would have LAN cards but they don't have the RJ connector, they only have the one for RG coaxial cable, I don't think there is a way to adapt it (maybe through HUB?) Sure there is, you can use a hub, or just a transceiver from BNC to UTP, or (if the card has a DB15 AUI connection) AUI to …

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Re: Bought these (retro) hardware today

Posted on 2021-05-30, 19:08

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[...] I would have LAN cards but they don't have the RJ connector, they only have the one for RG coaxial cable, I don't think there is a way to adapt it (maybe through HUB?) Yes! there are hubs with 8 RJ45 lan ports and "uplink" to a coaxial network. I have used them in the past and was a great …

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Re: I recently found this hardware, AKA the Dumpster find thread.

Posted on 2021-05-30, 19:04

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have selected various ISA cards for the motherboard with 386DX-40 (see photo), a 128MB SanDisk IDE-CF and CompactFlash adapter, a 16bit ISA controller with Acer M5105 chip and parallel and game serial ports, as sound card I have to choose one between AZTECH and Creativa SB16 Value (CT2770), as …

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Re: Bought these (retro) hardware today

Posted on 2021-05-29, 19:50

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This motherboard for 386DX arrived today. The card includes in addition to the 40MHz AMD 386DX CPU, four 30PIN SIMs for a total of 4MB (4X 1MB). I don't know which manufacturer is, on the board it says TK-82C390A-4N-D11SE, this maybe could be useful, from a search I did the board was very similar …

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Re: Bought these (retro) hardware today

Posted on 2021-05-28, 20:04

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This motherboard for 386DX arrived today. The card includes in addition to the 40MHz AMD 386DX CPU, four 30PIN SIMs for a total of 4MB (4X 1MB). I don't know which manufacturer is, on the board it says TK-82C390A-4N-D11SE, this maybe could be useful, from a search I did the board was very similar to …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-26, 20:33

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I checked the PCI PIN connection on another motherboard. The motherboard is a Soyo Slot1 i440BX chipset, the card is not working but trying to start the + 3.3V LED is on, a sign that the power supply of this line is working. In short, I checked where the A21 and A27 PINs are connected, I …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-25, 21:33

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

L8 + 4.99V | L10 + 4.99V | L11 + 0.02V | L9 + 0.02V | L15 + 4.89V | L14 + 4.70V Of these, both L11 and L9 are connected directly to ground (black wire). I also measured the voltage of three other inductors L12 L13 L16, the voltages present are these: L12 + 4.65V | L13 + 4.65V | L16 + 4.99V Ok, …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-25, 19:26

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I did some checks on the inductors, and they are all ok, although some have signs of melting. For completeness I must add that these L8 L9 L10 L11 L14 L15, go to the connection socket of the ATX FORM CARD, in which there are the PS2 port, the two USB and one IR. I have detected the values ​​ …

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Re: Bought these (retro) hardware today

Posted on 2021-05-25, 19:01

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes ok thanks. You're right, it's two banks of four each, if everything goes well and works, I can put in another 4MB, so I would get a total of 8MB of RAM. Probably this card supports RAM of higher capacity, for example those of 4MB each, unfortunately I have never had any and wanting to find them …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-24, 22:00

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes ok thanks. You can do these checks tomorrow, and in fact it could be as you suggest. Because it is actually strange that there is no voltage, those inductors L1 and L2 are placed between the ISA and PCI slots, near the CD-IN audio connectors. Ah, I can't count. I meant the 6 inductors by the …

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Re: Bought these (retro) hardware today

Posted on 2021-05-24, 21:46

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Purchased today a motherboard with CPU and RAM. It is a motherboard for CPU 386DX, the CPU is an AMD 386DX-40MHz, the RAM is 30 PIN (8 banks tot.) Of 1MB each, in total there are 4MB. I have some ISA cards aside, some VGA various controllers, and even some sound cards. The card will be shipped in …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-24, 21:38

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok I hope those photos can be useful, for those of more than 5MB I'll try to reduce them, but I don't know what the result will be. For the fuses I checked those three marked with F1 F3 and F4, these are all intact (perfect), I don't think there is an F2, for the moment I don't see it, if I find it …

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Re: Bought these (retro) hardware today

Posted on 2021-05-24, 21:01

by

by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

... the vendor says the card was working but hasn't started it for a while. "for a while"? Probably more like a decade. If this board works with all the corrosion around the battery I'll eat my hat. Get that battery of there asap. Then soak the whole area in white vinegar for a few minutes, then …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-24, 20:31

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Regarding what you have read about the 3.3V of the PCI slot, it could actually be like this, but I wouldn't be sure of this, if it was a 486 PCI maybe it will be like that, being a Slot1 (even if AT), it seems possible that the 3.3V LED should be on and not off. That's true, so maybe it is more …

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Re: Bought these (retro) hardware today

Posted on 2021-05-24, 20:17

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Purchased today a motherboard with CPU and RAM. It is a motherboard for CPU 386DX, the CPU is an AMD 386DX-40MHz, the RAM is 30 PIN (8 banks tot.) Of 1MB each, in total there are 4MB. I have some ISA cards aside, some VGA various controllers, and even some sound cards. The card will be shipped in …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-23, 19:45

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

For the PIN A21 I did the verification, and the result is that I did not find any voltage (measured 0.00V). Ok, so definitely no 3.3V on the PCI slots. And yet what should be the 3.3V pins are connected together, so it should have been possible to route 3.3V to them. It might be possible to …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-22, 19:39

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

need to check if there are + 3.3V on the PCI PINs, I will try to do this check, but if I can I will also check other PCI PINs, in particular I had read that on the PIN14 there would be a voltage of + 3.3V, if I find voltage somewhere I report the PINs and the voltages found. Feel free to measure …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-20, 20:47

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I checked the two diodes D16 and D1, and I measured the voltages, both have the PIN3 connected to the PIN1 of the nearby Mosfet, then the D16 with the Q22, and the D1 with the Q4. Having the PIN connected directly with the Mosfet, the measured voltage is the same, so for the D16 it is + 6.60V …

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Re: A-Trend ATC-1545 and jumpers to change the voltage for MMX cpu

Posted on 2021-05-19, 19:27

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I can't find a manual for this MB http://www.win3x.org/uh19/motherboard/show/7060 The one here https://www.elhvb.com/mboards/a-trend/manuals/index.html is corrupted, i need some help with setting the jumpers for my pentium 200 mmx Excuse a piece of information, what CPU do you currently have on the …

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Re: Identify motherboard Slot 1 SIS chipset

Posted on 2021-05-19, 19:09

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by PC@LIVE

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok thanks for the info and suggestions, I hope they will be useful to fix the fault. Ok I didn't know exactly Q5 and Q7 were voltage regulators, I thought they were mosfets, but thanks for the info. Regarding the nearby transistor Q22 (signed D16), it says APL 4031S A0112, obviously looking at the …

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