Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-11-01, 04:11
Did anyone try to install Windows 95 on a PB450 machine? For some reason setup.exe just hangs.
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-31, 22:51
here is a better (price-wise) battery holder https://www.digikey.com/product-detail/en/mpd … BH501-ND/557808 and here is a heatsink for the CPU if you need one https://www.digikey.com/product-detail/en/cts … -1104-ND/272742
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-31, 03:09
1210/1206 size will fit look for Low ESR capacitors, like this https://www.digikey.com/product-detail/en/avx … 90-1-ND/8024372 you can also buy the TO-220 mounting kit from digi-key: https://www.digikey.com/products/en?mpart=4880SG&v=59
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-29, 18:23
0603 is definitely too small 0805 may fit, but not sure, must be tantalum, not ceramic mine are around 3.4x2.8mm size also buy a 0-ohm smd resistor so your bridge look nice and professional and not like mine 😀
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-28, 13:27
The capacitors should be rated above 3.3v. The cache chips I'm using are on page 5 in this thread. You have to bridge R131 if you're using fixed version of the LDO (LT1085CT-3.3) otherwise you'll need two resistors mentioned above.
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-28, 00:32
I used a couple of 22uF The datasheet says 22uF is recommended
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-27, 16:26
Ok I did more tests on another motherboard. Looks like WB chip will only work in WB mode on some board revisions only. Here are some benchmark results with WT and WB chips and 512K L2 cache:
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-27, 13:48
WB version of the DX4-100 also works but I didn't notice any performance difference between WB abd WT Actually, the performance is quite not where I expect it to be, maybe because of missing L2 cache
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-27, 13:29
I bought the fixed one just because it was cheaper. For adjustable you will need 120 ohms and 200 ohms resistors. Check the formula in the datasheet. It is also important to solder two tantalum capacitors C206, C207
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-27, 05:00
It works
Make sound blaster sound through internal speaker
Posted on 2018-10-20, 22:18
I have an old Gateway P5-75 with CT2260 Vibra16 ISA card which had windows 95 installed and it used internal speaker for sound output. I kind of liked it and was not sure how exactly the sound was making its way to the PC speaker. The PC speaker wasn't connected to the sound card, but to the …
Re: Gateway 2000 System CD Image
Posted on 2018-10-19, 00:08
My P5-75 came with windows 3.11 originally It was upgraded to Windows 95 but still have Win 3.11 files and option to uninstall Windows 95. I don't care about 3.11 though and would even prefer a System CD with Windows 95 if there is one that supports this model.
Re: Gateway 2000 System CD Image
Posted on 2018-10-16, 03:48
I found this information online, so I'd say it should be version 4.6 Not sure if I can use newer/older CD versions. Gateway 2000 System CD 3.4 (February 1994) Gateway 2000 System CD 3.5 (March 1994) Gateway 2000 System CD 3.6 (April 1994) Gateway 2000 System CD 3.7 (May 1994) Gateway 2000 System CD …
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-10-14, 22:22
I've just moved to another state, was quite busy so no news yet. will update as soon as I get to this.
Re: Gateway 2000 System CD Image
Posted on 2018-10-14, 21:43
Looking for a Gateway 2000 System CD for a P5-75 model (MFG date 02/1995)
Re: Packard bell PB450 repair / mods / upgrade
Posted on 2018-09-19, 21:13
Just bought two Intel dx4-100 chips - one with WB cache and another with WT. I believe both will work just fine. I tested the board with both WB and WT versions of dx2-66 Is there a benchmark where the difference between WB and WT is noticeable? I'm also not sure if WB mode should be specifically …
Re: Packard bell PB450 two beeps
Posted on 2018-09-19, 17:14
Not sure I understand you question. It is logically and physically a part of the motherboard. Packard bell probably cheaped out and decided not to solder it. This made 3.3v jumpers (J32) non-functional. By soldering missing parts you will make this jumper functional and will be able to use 3.3v CPUs …
Re: Packard bell PB450 two beeps
Posted on 2018-09-19, 16:26
Overdrive chips are expensive, LT1085 LDO chip is not ($7 at digi-key), there is also a fixed variant LT1085CT-3.3 that does not require resistors. So you would only need a chip and a few smd tantalum capacitors that I can scavenge from some other board. The only problem is to get proper isolation …
Re: Packard bell PB450 two beeps
Posted on 2018-09-19, 16:02
Now when I upgraded the graphics chip I'm thinking about upgrading to Intel DX4 100 I believe I would need to do a 3.3v mod for that. the board is supposed to support that voltage, but the LDO components are not soldered. Has anyone tried that with this board?
Re: IBM PC 300GL BIOS / recovery CDs
Posted on 2018-09-17, 18:20
Already found bios update (pjjt41a.exe) Now looking for original IBM drivers
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