in Hardware, Retro computing, S3 Trio64V+, TEAC FD-55GFR, Winco W-P55TV2, Yamaha-LSI Audio Wave

Back to the 90s, adventures in restoring retro PC from the junkyard

Recently I came up with the idea to build myself a newer retro PC from the ’90s, something like the first Pentium with DOS 6.22 and Windows 3.11. I have a couple of retro laptops running Windows 95 and Windows 98. The motivation was that I want to have a retro desktop PC with as many peripherals as I could get, mostly I was interested if 5.25 and 3.5 floppy disk drives.

As usual, without a hurry, I have started looking around on eBay to see what I could get there. I was quite surprised when I have found out that prices for PC parts of that era are quite high. Seems like the retro community is quite an active thing. When googling about some of the hardware, the most useful information I got was sites like https://www.vogons.org/ and http://www.vcfed.org/ and maybe a couple of other I don’t remember now.

My first acquisition was quite a nice TEAC FD-55GFR floppy disk drive. What caught my attention was that it is quite versatile and can work with double density and high-density floppy disks 1.2MB, 360kB, 180kB. According to VOGONS information, it is the most capable drive in the Teac FD-55 series. It can read double and high density, 80 tracks, 300/360rpm floppy disks.

Now I was missing just the rest of the everything else ๐Ÿ™‚

Still looking around on eBay started to get a feeling what motherboard, graphic card, sound card, etc., I should get. But looking at various parts and PC cases I started to get an intuition that buying everything on eBay might get quite expensive, so I have decided to look around. One day I was driving near a scrapyard where electronics is recycled and decided to make a visit. And to my surprise, they actually still had two computers fully from that era and fully assembled with all the parts. Of course, they were looking terribly and nobody knew if anything inside works at all but still I decided to take my chance and took both of them for 20 euro each.

So this is first PC. I had no idea what is inside before opening it.

First PC from scrap yard

Disassembling PC

Internals before cleaning
Sound card Yamaha-LSI Audio Wave (ISA)
Ethernet card, generic Realtec with RTL8139C (PCI)
Video card S3 Trio64V+ (PCI)
And last card was some kind of ISA Fax Modem, not sure regarding make or model. It has FB M33PSF number on the back.
Samsung CD-Master 12E MODEL SCR-1231 CD-ROM drive. In the end, it was the only nonfunctional thing in this PC (it was not spinning) and I have replaced it with some DVD-RW drive I had.
Newtronics Co Ltd MITSUMI 3.5 floppy disk drive
JNC Computers Corp. switching power supply (AT type)
Motherboard.
Side says P55TV2โ€“5. Searching for it I found EPOX P55TV2 information, but this board is a bit different by slot numbers. Searching a little bit more I identified it as Winco W-P55TV2. At least in pictures, it looks 100% identical. Sad thing is that not much information about this motherboard online. Winco is long gone. But below is what I have found.found.
Winco W-P55TV2 Specification: CPU – Intel Pentium (P54C), Intel Pentium MMX (P55C), AMD K5/K6, Cytrix 6×86 CPU. CHIPSET – Intel 430VX PCIset. CACHE MEMORY – Supports Pipelined Burst SRAM, onboard 256KB (OR UPGRADE TO 512kb). DRAM MODULES – 72pin SIMM x 4 for Fast Page and EDO RAM, 168pin DIMM x 1 for SDRAM, supports up to 128MB. EXPANSION SLOTS – 32 bit PCI MAaster Bus x 3 and 16 bit ISA Bus x 4. ONBOARD I/O – supports Winbond w83877f Super Multi I/O for 1 floppy port, 1 parallel port (EPP, ECP port), 2 Serial ports. ONBOARD PCI IDE – PCI Bus IDE Port x 2 ( up to 4 IDE devices ). I/O CONNECTORS – supports PS/2 mouse and standard AT keyboard. USB – supports universal serial bus connectors (2 ports). BIOS – Hardware Plug And Play bios with FLASH EPROM. FORM FACTOR – 220 x 260 half AT size.
Empty case. Later I have cleaned with water and painted back side and bottom side as those had lots of corrosion.
CPU with the fan removed – identified as BP80502166.
Winco W-P55TV2 motherboard with everything removed. Ready for cleaning.

Cleaning

Regarding cleaning, I did what I have never done beforeโ€Šโ€”โ€Šloaded all computer boards to the dishwasher! Then carefully dried everything with a hot gun and left to dry out overnight.

Computer boards ready to be loaded to the dishwasher!
Also tested the power supply with a multimeter for correct voltages. Tested front panel display to check that it works. Disassembled power supply, cleaned everything with a vacuum cleaner.
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Also tested the power supply with a multimeter for correct voltages. Tested front panel display to check that it works. Disassembled power supply, cleaned everything with a vacuum cleaner.
Shiny motherboard after cleaning it in dishwasher.
Shiny Yamaha-LSI Audio Wave after dishwasher!
PC frame after cleaning rust and some painting.

And now let’s skip the assembling process and go straight to the finished PCโ€ฆ Just have to mention that I did not have AT keyboard at the moment. PS/2 to AT cable is on its way. So what I did, I took 8 pin din plug I had, removed 3 pins, soldered a cable to this din connector and another end to PS/2 keyboard itself ( had to disassemble it ). So now this keyboard has 2 cables PS/2 and AT. It’s a quick hack made with things I had by my hand at the moment ๐Ÿ˜›

Looking good! As I said original CD-ROM drive was not working so added some DVD-RW optical drive I had laying around. TEAC FD-55GFR 5.25 floppy drive fits like it was meant to be there.
Running DOS 6.22 and Windows 3.11
Beauty! ๐Ÿ™‚

At the end build is

Intel Pentium 166MHz

Winco P55TV2 motherboard

48MB RAM (2x8MB + 2x16MB SIMM)

S3 Trio 64V+, PCI video card

Yamaha-SLI Audio Wave, ISA audio card

TEAC FD-55GFR 5.25 FDD

Mitsumi 3.5 FDD

LITE-ON SHW 1635 DVD+-RW

NEC USB 2.0 PCI USB card

Realtek Ethernet card, PCI

Some old 20GB HDD, only 8gb partition is used now.

Modifications, changes, and notes regarding this build.

Original CD-ROM was replaced with DVD-RW, works the same way in dos.

TEAC FD-55GFR works perfectly. I managed to format a couple of DD 360KB floppies I had laying around.

Test case, FujiFilm DS DD floppy disk
Preparing to low-level format Fuji DS DD 360K floppy using TEAC FD-55GFR and ImageDisk tool.
Low-level formatting in progress of Fuji DS DD 360K floppy using TEAC FD-55GFR
Dos formatting of Fuji DS DD 360K floppy TEAC FD-55GFR
Testing Fuji DS DD 360K floppy using Norton Commander

Winco P55TV2 PCI IDE DRIVER and “LATEST” BIOS UPDATE I have found.

Yamaha-LSI Audio Wave OPL3-SAx Drivers for YMF701, 711, 715, 718, 719 (Win 3.x v. 3.29 with MS-DOS 6.x support) found here.

Yamaha-SLI Audio Wave settings

I have not managed to make Motherboard USB ports to work, not sure why. I have enabled USB in Bios settings, connected USB bracket to the motherboards USB pins, but no luck. So I have added a spare 5xUSB PCI card and it worked perfectly in DOS 6.22 using NJ32DISK.SYS and usbaspi.sys drivers.

PCI USB card that I have added and it works in DOS 6.22

On the other hand, I am really happy that this PCI USB card works and USB flash drives work under DOS, more convenient software transferring it is!

Current AUTOEXEC.BAT

SET BLASTER=A220 I5 D1 T4
LH C:\DOS\DRIVERS\OPL3SAX\SETUPSA.EXE /S
LH C:\WINDOWS\SMARTDRV.EXE /L
LH C:\WINDOWS\MSCDEX.EXE /S /D:BANANA /L:R

@ECHO OFF
PATH=C:\WINDOWS;C:\DOS;C:\NC;C:\FDDTOOLS\OMNIDISK;C:\FDDTOOLS\IMD118
SET TEMP=C:\WINDOWS\TEMP
LH DOSKEY

Current CONFIG.SYS

DEVICE=C:\WINDOWS\himem.SYS /testmem:off
DOS=HIGH,UMB
DEVICEHIGH=C:\DOS\DRIVERS\emm386.exe noems
DEVICEHIGH=C:\DOS\DRIVERS\cd1.SYS /D:banana
DEVICEHIGH=C:\DOS\DRIVERS\USB\usbaspi1.SYS
DEVICEHIGH=C:\DOS\DRIVERS\USB\nj32disk.SYS
DEVICEHIGH=C:\DOS\DRIVERS\mouse.sys
FILES=30
BUFFERS=20
LASTDRIVE=Z
DEVICE=C:\WINDOWS\SMARTDRV.EXE /DOUBLE_BUFFER
DEVICE=C:\WINDOWS\IFSHLP.SYS
STACKS=9,256

Things TO DO

Add CF card ( or SD ) support, maybe use it as system drive. Idea is somehow to mount it below FDD so it would be easy to swap cards.

Make motherboard USB to work.

Fix this nasty crack on the front panel. Maybe fix it with some epoxy or something, have to think about it.

Find a way to fix this crack on top part of the front panel ๐Ÿ™

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