-

reserved 2

-

I removed the sub-battery as it was already dead and bulging.
The plastic wrapping saved the system from bad leaking.

Sub-battery,
7.2V 110mAh
6/V110H Ni-MH

RTC battery is dead and I need to replace it,
3.6V 30mAh Ni-MH
3/V30H

Being Ni-MH batteries there's no battery hack possible and there are no EXT Batt pins.

The RTC battery plug on the m/b is corroded, leak travelled down through the cables to the plug.

The plastic plug can't be removed, but it came out shiny after vinegar.

--

Battery replacement:

1) RTC
2)Sub-battery

I found several 3.6v but 20mAh instead of 30, is that ok? To me it's just going to last less. Same for sub battery.

Really need help on this.
Thanks

You don't need sub-battery, and yes, 20mAh is fine.

Now cd-rom is working. Model is XM-1402B, 6x reading speed 😀

It can be connected as a standard cd-rom drive with a 44 to 40 pin ide card.
Had a loose pin and after a resolder it now works.
Cds must either be originals or slow speed burn otherwise it won't read; common with all early drives.

Screen:
"11.3-inch, Thin Film Transistor (TFT) color LCD with 800 x 600
pixels. The 200CDS has an 11.3-inch Dual-scan Supertwist Nematic (DSTN) color
LCD with 800 x 600 pixels. The built-in display controller supports 800 x 600
resolution with 16M colors capability and up to 1280 x 1024 resolution with 256
colors on an external CRT"

I have some issues with it,
quality is poor and black is not really black... see pics
We can see all the drawbacks of a DSTN screen. Unsuitable for gaming.

In 800x600 in Quake I get those blue artifacts.
Text quality is low and/or bad, but I noticed that before autoexec.bat finishes loading it changes from high text quality to bad.
Probably a wrong mode code prepare something. No code set and it displays letters perfectly.
Never had that before.

RAM
16MB looks low to me.

There's an expansion card with 8MB, but can hold as much as 32MB. Model is KTT 610/32, or ktt 610-32...
Maybe I can solder some chips and pimp it up.

Has D4218160LG5-A60-7JF 2MB . Now I have to find them at a decent price or an equivalent chip.
I believe they are 60ns, nothing fancy + capacitors value to solder on them. As chips are 3.3V probably 0.1µF 50V should work.

Drivers for SB Pro ver 2 work.
Zak McKracken has sound. Monkey Island has sound. Those are games that I like and they work.
Castles 2 doesn't have sound, but I think I need some tinkering to make it work. Will look into it.

Phil's starter pack for ms-dos is handy and the only adjustment is last version of Cutemouse ver 2.1 set to "force serial" /S option. With the older version 1.9 it hangs.
Maybe he updated his pack and it works.
Bear in mind that having a PS/2 port you have to set correctly ctmouse to use the right port.

Update:
- ram expansion is only a bunch of ram chips soldered and there's nothing more than that; adding ram is actually soldering more chips and more capacitors;

- floppy disk drive: I'm trying to figure out the pinout of the ext FDD, maybe there's a way to connect an ordinary FDD to it;
I'm still missing some connection pins, notably fdd pins:
2 - density select
10 - motor enable A
12 - drive select B
14 - drive select A
16 - motor enable B

All the others are easy to figure out as they have almost the same description.

Does anyone know the model of the external socket for the ext FDD?

I'll post pictures later.

Lacking a FDD makes it less interesting, requiring to remove the SD card a lot or burning cds.
Having a floppy drive would help somewhat or at least trying a Gotek might save the day. FDDs aren't eternal.

Ext FDD pinout ---- regular FDD interface pinout

001 VCC
002 IFINDX;000 I ---- Index
003 VCC
004 IFDAS2;000 O ---- ??? drive select B?
005 VCC
006 DSKCHG;000 I ---- disk change
007 VCC
008 IFRADY;000 I ---- ??? ready? not used?
009 IFHMED;000 I ---- ??? media? not used?
010 IFAMO2;000 O ---- ??? motor enable B?
011 IFLOWD;000 O ---- ??? density select?
012 IFDIRC;000 O ---- direction
013 SLFDLD;100 I ---- ??? no idea
014 IFSTEP;000 O ---- step
015 GND
016 IFWDAT;000 O ---- write data
017 GND
018 IFWEN;000 O ---- write enable/gate
019 GND
020 IFTRKO;000 I ---- track zero 0
021 GND
022 IFWPRO;000 I ---- write protect
023 GND
024 IFRDAT;000 I ---- read data
025 GND
026 IFSSEL;000 O ---- side 1 select

I'll check this post to see if it is applicable to this case.
https://torlus.com/floppy/forum/viewtopic.php … t=1932&start=30

https://old.pinouts.ru/HD/extensa_externalfdd_pinout.shtml
This one is more promising.

I've got one of the floppy drives with the external caddy. I could check pinouts potentially? The drives they use are often not working these days since many of the drives at that time were belt driven, which have all stretched out now.

One thing I would recommend is that instead of relying on floppy disks, you could get a PCMCIA to CF-card adapter and use a USB to CF adapter on your PC. I found transferring files that way is quite easy - the pcmcia flash storage drivers auto detect in Windows and I think there are even DOS PC card storage drivers.

DSTN screens are certainly fun to play FPS games on 😀

Thermalwrong wrote on 2021-02-26, 23:25:

I've got one of the floppy drives with the external caddy. I could check pinouts potentially? The drives they use are often not working these days since many of the drives at that time were belt driven, which have all stretched out now.

One thing I would recommend is that instead of relying on floppy disks, you could get a PCMCIA to CF-card adapter and use a USB to CF adapter on your PC. I found transferring files that way is quite easy - the pcmcia flash storage drivers auto detect in Windows and I think there are even DOS PC card storage drivers.

DSTN screens are certainly fun to play FPS games on 😀

Any help would be great. I can't give instructions because I have no idea how to test, internal pinout or anything else. I don't know which pin is 1 of the external connector and the sequence of them (1 is top or bottom row? left to right?).
I have a pinout of the external port from the maintenance book (attached in the first post), and crossed it with a normal fdd pinout.
It's a bothersome task, I'm not sweating for it.

I'd like to find a way to use a floppy drive to input data. Some of these laptops come with a broken cd/dvd-rom, it would give options and potentially allow for a GOTEK.
As you suggest a pcmcia to cf is a better solution (I ordered some), but you still need to have it around. A desktop FDD is still quite common.
Belts are the death of FDDs...
And brag about it with friends at the pub??? 🤣

DSTN screens suck BIG time 😀

Saturday morning gibberish 😀
Maybe I should open a specific thread for this.

I have an issue with the PS2 connector.
Post halts at KBC error.

Appeared after I used an external keyboard to avoid errors with problematic keys on the stock keyboard.
Prior signs of repair are there.

A couple of R22 read 0.09 and 0.14 instead of 0.22 ohm

Nexxen wrote on 2022-01-29, 14:52:

I have an issue with the PS2 connector. Post halts at KBC error. […]
Show full quote

I have an issue with the PS2 connector.
Post halts at KBC error.

Appeared after I used an external keyboard to avoid errors with problematic keys on the stock keyboard.
Prior signs of repair are there.

A couple of R22 read 0.09 and 0.14 instead of 0.22 ohm

Sounds like its cracked the solder joints on the keyboard connector, these laptops will halt if that connector is damaged. This happened recently to another user and once they repaired the connector the machine worked as normal, pretty sure Toshiba routed the internal keyboard through that connector, if it breaks it stops both keyboards from being detected.

alps - j v2.2 is this a keyboard rom?
Can't find anything