Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 21:31

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

One thing I've done to mine that I don't see here. I installed a sound blaster pro (with a volume control wheel) and attached a tiny 5v audio amplifier circuit and speaker. This is installed internally with the card in the 16 bit slot and the speaker in the area above the graphics card. Works great …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 21:18

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I guess I borked the install ..or as you say ..the KB is configured for US on that installation. Your config.sys and autoexec.bat should contain the following (you can edit with win95 notepad): Config.sys: Device=C:\windows\command\display.sys con=(ega,,1) Country=044,850,C:\windows\command\ …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 21:06

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ian, would it be possible to connect any other vga display adapter to the plasma screen of the T5200? (have in the back of my mind a notion to get a second, non-functioning T5200 or T3200 with a working plasma display and installing an itx motherboard in it, or possibly an intel based Raspberry Pi …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 20:20

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Curious .. the backslash key prints the correct character in win95 notepad ...but no response at all when in DOS ? now I _AM_ confused..?? Are you loading the UK keyboard driver in config.sys? If not it will default to US layout and the \ is on another key. I remain in the directory 5200 ? I can A: …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 16:52

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm interested in details about the plasma display signalling and power. Does anyone know how it works or have photos? There is a pinout for the display cable connector on the motherboard in the maintenance manual on page B-3 http://www.minuszerodegrees.net/manuals/Toshiba/Other/Toshiba%20T5200%20 …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-10, 10:48

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Btw ..anythoughts on my earlier postings ..re math co processors ...and more importantly to me ..the odd boot behaviour I see with 16 bit ISA cards ? You can fit any 387 compatible maths co-processor (They were made by many companies including Intel, IIT and Cyrix). The original Intel 387 was slow …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-04-08, 14:54

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Ian .. Would you mind checking my wiring and connections before I attempt reassembly ? Have I left anything out ? etc. Looks OK as far as I can tell. After partial re-assembly, confirm you can still boot from a floppy as that's the time the flush circuit is needed. Also run cachechk.exe to …

---

Re: A couple of retros I'm working on.

Posted on 2018-04-01, 21:36

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

Could these simply be paralleled to the existing 16 bit ISA ..and does this apply to all the connections ? What I'm trying to say is ..can I simply duplicate the 16 bit slot ..wiring the isa card in paralell ? Yes, you can duplicate the 16 bit extension on the 8 bit slot and it will work as a 16 …

---

Re: A couple of retros I'm working on.

Posted on 2018-04-01, 01:30

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

How do I get into the bios now that the CMOS is battery-backed? Disconnect the battery for 30 secs or so. (You can also get in via the test3.exe program but that only works if the system is booting OK. Do you see the XTIDE bios banner at all? Have you connected the CF card as well? If so did you …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-31, 23:55

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If it's not too much trouble Ian.. I could do with some pointers on how and where to route 40 wire ribbon cable from inside the metal cage where the conner was to a pcmcia interface card inside the ISA cavity to the rear of the T5200.. A description would suffice.. pictures would be even more …

---

Re: A couple of retros I'm working on.

Posted on 2018-03-31, 23:38

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

Here is a pic of the one I ordered.. small enough ..I hope lol Short soundcards like that should work in the 8 bit slot but you must make sure they are configured to use interrupt and DMA resources that are available on the 8 bit slot and not ones on the 16 bit extension. Also if you are installing …

---

Re: A couple of retros I'm working on.

Posted on 2018-03-31, 23:22

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

The "empty socket" I'd seen in a picture was the socket for the 387... I took the chip to the left of the CPU to be the 387. So what is that chip to the left of the CPU? The chip to the left of the CPU is the cache controller and the chip to the right is the optional 387 maths co-processor and you …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-25, 19:59

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The TMS 27C210 I managed to read, the D8749H is not supported by my miniprom programmer. The content of the TMS 27C210 looks like it starts off with a Video Bios? Attached find the BIOS from the 27C210 chip labeld 006D and the Video-BIOS, located on a 27C256 chip labeld 198B from my T5200, maybe it …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-24, 22:24

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

when i disconnect the battery and power up my spare T5200, it starts, displays the memory check, then some error messages and i can go to setup by pressing F1. Glad to hear it's not dead, I found that sometimes when the CMOS is corrupt that you can get no output on startup which is why I suggested …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-24, 22:13

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

the disgnostic ISA/PCI arrived this morning ... It came with jumper leads ? no idea what they are for ...and a small booklet which at first glance is meaningless ..though error codes are listed. there s also a small pushbutton onthe board labelled S1 ...and again ...no idea what it is for. I think …

---

Re: A couple of retros I'm working on.

Posted on 2018-03-15, 18:49

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

And the Sony works perfectly, after grounding pin9 as well it formats 1.44MB floppies as well. (But strangely now I get the "Drive does not support parameters" when I want to format 720kb disks now and it makes them unreadable, so grounding pin 9 kind of switched that problem around?? o.O) Yes, pin …

---

Re: A couple of retros I'm working on.

Posted on 2018-03-15, 00:21

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

I guess this is one reason why you fitted additional ISA sockets ..so that a vga card could be used ? No, I have some other unusual ISA cards such as the EXPRO programmer, an I2C bus analyser and an ECOLINK Econet network interface to network with my Acorn 8 and 32 bit machines. There is an option …

---

Re: A couple of retros I'm working on.

Posted on 2018-03-14, 22:34

by

by IanB

in Marvin \ System Specs

in Marvin \ System Specs

I also fitted that network card I ordered ..it was designed to fit in a 16 bit isa slot ..but since it was short enough ..once the front metal bracket was removed ..I popped this in the 8 bit slot .. obviously not all contacts are in a slot..those after the gap ..were left floating .. This was not …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-13, 23:18

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My japanese T5200 now has a new floppy, a flash IDE disk and since today... a 486 SXL-40 Processor. Great :happy: Another satisfied customer :happy: If you want to try cooling the 486SXL, Vipersan posted in his thread about some experiments using a thin copper sheet to transfer the heat to the …

---

Re: Toshiba T5200 mods and upgrades

Posted on 2018-03-13, 15:21

by

by IanB

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Vipersan wrote: I assume the modded firmware Im using (Hamby bios) is suitable ? The modded Hamby BIOS is suitable but it must be the 1.2 update, not the earlier 1.1 update. This update number is displayed on bootup.

---