16ShadesOfOrange wrote on 2021-06-20, 06:34:

Hey all, I gave the screen issue another look with fresh eyes (12mo later!). It's no coincidence about the PSU short and the sc […]
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16ShadesOfOrange wrote on 2020-08-22, 12:08:

• In an attempt to quieten the fans and give them 6V instead of the 12V from the PSU connector, I shorted out 2x 12V PSU fan connectors 😱(they're dead) so I'm now running 3x 12V fans in parallel from the single left-side fan connector. I opened up the PSU but can't see any obvious issues, so for now it's running
• I busted my screen somehow 😥. Seems to work OK in graphics mode eg full screen stuff like in Windows, but in DOS mode it's almost inverse, eg black is orange, the display sometimes becomes distorted/picks up interference, text becomes wobbly and almost unreadable.

Hey all, I gave the screen issue another look with fresh eyes (12mo later!). It's no coincidence about the PSU short and the screen being weird.

Ive found I've lost the 24v rail (yellow PSU wire). I guess the good news is the screen's probably unharmed 😃

I found a replacement PSU on ebay for $95USD which is steep, so I'll poke around in the PSU to see what "popped" 🚬. If anyone has a PSU schematic please hit me up!

BTW, has anyone attempted to build their own PSU or replace it with an off-the-shelf one?

I know I've seen schematic for the Toshiba T3100 PSU somewhere in service repair manual , online , if you really still need it and you can't find I can search for it.

And people , don't forget , keep cleaning your 1,44 Floppy drives , if they beep during boot-up (red/orange led) you are good to go, you just need to clean the head with cleaning floppy + alcohol , at least 10 times , 15 to be sure. then try to load floppy. (I also had initial issues with my floppy drive , but after a good clean 0 problems since).

as for HDD 3.5 if it's EIDE , you are not stuck to 100mbs, you use overlay app from floppy and setup your drive , works for older Seagate's fine. (tested fine on 4.3 gb , will test a 20gb soon - no bios mods or updates for T3100 required). I hear good success even up to WD120gb caviars also. (not sure how much can be used with drive but seem to work).

fool wrote on 2022-12-30, 10:35:

Someone interested in 2MB and 8MB 40pin SIMM memory kits? Nothing is ready yet. Just scouting before I make any PWB & chip orders because these are not cheap. Also have to repair my test bench first, no RAMs without it.

I'd be interesting, depending on cost. I'm thinking of trying to install Desqview/X on my T5200, so more ram would help.

Hamby wrote on 2023-02-02, 07:56:

fool wrote on 2022-12-30, 10:35:

Someone interested in 2MB and 8MB 40pin SIMM memory kits? Nothing is ready yet. Just scouting before I make any PWB & chip orders because these are not cheap. Also have to repair my test bench first, no RAMs without it.

I'd be interesting, depending on cost. I'm thinking of trying to install Desqview/X on my T5200, so more ram would help.

OK, good to know. I just orered chips, so it will take some time to test if it even works. In best case I have one pair for you, but I'll build more if there's interest.
I will update the status in T8500 thread (sig).

Hi @fool, 8MB-SIMM kit sounds intresting.

Today i was wondering, if there was a way to increase the VGA-RAM of the T5200, which is said to be just 256kB. Maybe it could be possible to get at least a SVGA mode of 640x480 with 256 colors with Win3.1?
Then i realized that there allready is 1MB of RAM installed on the VGA-board, not just 256kB!
So maybe its just the VGA-BIOS that configures the Paradise PVGA1A to only 256kB?
Has anyone ever tried to make the whole 1MB accessable?

😀 ferrytale

ferrytale wrote on 2023-03-19, 23:52:

Hi @fool, 8MB-SIMM kit sounds intresting. […]
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Hi @fool, 8MB-SIMM kit sounds intresting.

Today i was wondering, if there was a way to increase the VGA-RAM, which is said to be just 256kB. Maybe it could be possible to get at least a SVGA mode of 640x480 with 256 colors with Win3.1?
Then i realized that there actually is 1MB of RAM installed on the VGA-board, not just 256kB!
So maybe its just the VGA-BIOS that configures the Paradise PVGA1A to only 256kB?
Has anyone ever tried to make the whole 1MB accessable?

😀 ferrytale

on CGA , under NC(northon) , you could check all memory allocation units. (Sram,256kbGpuram, dos ,nc & so on - what and where the memory and how it's used) - not sure if it's helpfull but I just wrote to anyone interested.

From 4MB to 12MB. Newest version of Open Cubic Player started working!

Other specs:
-486SXL2/40 with cache flush circuit
-original 387/20
-10GB HDD (taken from original XBOX)
-modded BIOS for CPU with XTIDE
-Gravis Ultrasound MAX
-3COM ethernet

Running DOS 6.22 & WfW 3.11. Maybe I'll install Windows 95D (Razorback version) too aside with 3.11, just for fun.

fool wrote on 2022-12-30, 10:35:

Someone interested in 2MB and 8MB 40pin SIMM memory kits? Nothing is ready yet. Just scouting before I make any PWB & chip orders because these are not cheap. Also have to repair my test bench first, no RAMs without it.

Hi,

I am very interested in a 8mb 40pin SIMM kit, can you please contact me on kdevries for prices/availability ?

Greetings,

Kevin

Or though the vogons message option ?

ferrytale wrote on 2023-03-19, 23:52:

Hi @fool, 8MB-SIMM kit sounds intresting. […]
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Hi @fool, 8MB-SIMM kit sounds intresting.

Today i was wondering, if there was a way to increase the VGA-RAM of the T5200, which is said to be just 256kB. Maybe it could be possible to get at least a SVGA mode of 640x480 with 256 colors with Win3.1?
Then i realized that there allready is 1MB of RAM installed on the VGA-board, not just 256kB!
So maybe its just the VGA-BIOS that configures the Paradise PVGA1A to only 256kB?
Has anyone ever tried to make the whole 1MB accessable?

😀 ferrytale

Very interesting, hopefully it will be possible to use that 1mb !!

Installed Windows 95D Lite (by Razorback) yesterday and it runs nicely. Wintach says it's faster than WfW 3.11 😀

kdevries wrote on 2023-03-28, 07:40:

Hi, […]
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fool wrote on 2022-12-30, 10:35:

Someone interested in 2MB and 8MB 40pin SIMM memory kits? Nothing is ready yet. Just scouting before I make any PWB & chip orders because these are not cheap. Also have to repair my test bench first, no RAMs without it.

Hi,

I am very interested in a 8mb 40pin SIMM kit, can you please contact me on kdevries for prices/availability ?

Greetings,

Kevin

I will make another small batch in future with some fixes. I've been working with other projects recently, but thanks dj_pirtu for smoke testing in T5200 meanwhile!
I'll let you know when those are available.

Thnxs for the update 👌🏻

IanB wrote on 2018-01-16, 04:10:

...
7. Patched the BIOS to support all the above
...

Hello IanB.

How did you manage to patch the BIOS, and what tools did you use?
Just dissassembling the .BIN-file and changing the assembler code?

I used your patched BIOSes for my T3200SX and T5200 and this is working very nice, but i also have a T3200SXC and i would like to have its BIOS patched too.
Can you tell me/us how it is done or could you provide a patched BIOS for this model too?

Thank you very much.
😀

That is brilliant, thanks for sharing!

IanB wrote on 2018-01-21, 14:59:

Edit: It turned out that the machine had a later 32K VGA BIOS instead of the previous 24K one and that required the 3.xx Phoenix […]
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Vipersan wrote:

Something about my 5200 doesnt appear to like the Award ??

Edit:
It turned out that the machine had a later 32K VGA BIOS instead of the previous 24K one and that required the 3.xx Phoenix or later 5.30 Award BIOS to work

Here is a zip with all the main BIOS and VGA BIOS versions found so far including patched versions:

T5200 BIOS pack 1-2a.zip
This contains BIOS versions 1.20, 1.30, 3.00, 3.10 & 5.30 and the 24K and 32K VGA BIOS
All versions except for 1.20 have been patched and there are two different versions of each patch, one with XTIDE that uses workspace in low memory and one that uses workspace in high memory. See the readme.txt file in the zip for more details.

I'm currently using "T5200 BIOS V5.30 (Award) patch 1.2 with LOMEM XTIDE 640K.BIN" but the others are included in case of any compatibility problems.

As the T3200SX is very similar, I've patched some of the BIOS versions for that as well:

T3200SX BIOS pack 1-0.zip
The four patched versions in the zip have had little testing as I don't have one myself but vipersan has confirmed they will all boot OK.

Also as XTIDE is GPL software, here is the source for the custom version included in all the above:
XTIDE_Universal_BIOS.zip
These BIOSes have XTIDE Universal BIOS built in, support for a 3.5" second floppy, slave IDE and they will initialise 486 upgrade processors on the T5200. No guarantees, use at your own risk.

I will update this post with any new versions if required and the current patch update is 1.2
The changes from the previous 1.1 patch posted here are:
1. Enable both A20 and Flush mods if A20 mod detected (previously only A20 enabled)
2. Add HIMEM version of XTIDE
The only reason to upgrade from the 1.1 patch is if you intend to install an upgrade processor and do the A20 & Flush mods for improved performance or you find some compatibilty issue (1.1 only had LOMEM XTIDE)

Hello. I'm new here and I have a T5200 with bios v1.2. Please , how do I burn this changed bios and which one should I use ? Thank you all
I am brasilian and my english is very poor, sorry

Hello. I'm new here and I have a T5200 with bios v1.2. Please , how do I burn this changed bios and which one should I use ? Thank you all
I am brasilian and my english is very poor, sorry

I would suggest leaving current bios. For hdd upgrade just use ontrack and a seagate.

mikeyp wrote on 2019-04-01, 13:05:

Hi IanB […]
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Hi IanB

Are you still willing to HDD/XTIDE patch rubbish Toshiba BIOSes for others please? I have a Toshiba T1850C where the old Conner HDD is failing. I'd love to get it up and running again with either a period hard drive or CF card. I'd be very grateful if you can.

My thread is here Old Toshiba notebook - limited HDD replacement options?
and this bios is here: T1850C.zip

Thank you.

Michael

Hi Michael,
In that zip file there are two executables:, but no bin file:
BOOTBIOS.COM
CHGBIOS.EXE

Can you tell me what they are for?

Thanks,
Bojan

Hey everyone,

I have a pair of 1MB 40-pin SIMMs for the T5200 sitting on my bench. They were rescues from Computer Reset.

They need a home. You can pick them up free at my shop in the Dallas Metromess or for cost of shipping fees.

Thanks,

Raymond
Arcadecomponents.com

channelmaniac wrote on 2023-09-14, 05:40:

Hey everyone, […]
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Hey everyone,

I have a pair of 1MB 40-pin SIMMs for the T5200 sitting on my bench. They were rescues from Computer Reset.

They need a home. You can pick them up free at my shop in the Dallas Metromess or for cost of shipping fees.

Thanks,

Raymond
Arcadecomponents.com

Hi Raymond,
I'd like to get them. I have four Toshibas right now, T5100, T5200 (2), T5200C
I could use the ram in some. i will pay for shipping. I emailed u at Arcadecomponents.com
Greg

Email replied.