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trying to get my epson 286 pc to work

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Reply 180 of 188, by wierd_w

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Yeah, I advised that as well via DMs before bringing this perniciously troublesome system back out here for more eyeballs.

Here is the relavent page concerning how to enable/disable the floppy controller.

The attachment Screenshot_20260723-122528_Firefox.png is no longer available

The jumper block in question is physically located near the HDD activity LED header.

Reply 181 of 188, by DaveDDS

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It does look like a fairly decent AT controller for IDE drives.

It shows a shroud on IDE1 connector with they KEY on the component side of the board. IDE#2 shows pins 1&2 at the side of the connector away from the backplace - so the red wire on your ribbon cables should be at that end!

Just to confirm exactly how the jumpers are set: (forgive ASCII drawing)

 
+-----+
| . . | Disable \ JP1
| === | Enable /
+-----+

If the Epson already has a floppy controller (most early ATs mainboards didn't) your floppy cable would be plugged into the mainboard (or another card) and JP1 should be set DISABLE

If your floppy control is plugged into the SIIG card, JP1 should be set ENABLE

+---+---+---+---+---+---+---+---+---+---+---+---+
| [ | [ | [ | [ | [ | . | . | . | I | . | . | . | \ JP2
| ] | ] | ] | ] | ] | . | . | . | I | . | . | . | /
+---+---+---+---+---+---+---+---+---+---+---+---+
| P | S | R | S | I | I | D | D | I | I | D | D |
| R | C | O | H | R | R | R | A | R | R | R | A |
| I | N | M | A | Q | Q | Q | C | Q | Q | Q | C |
| M | D | | | 1 | 1 | 5 | K | 1 | 1 | 6 | K |
| | | | | 4 | 0 | | 5 | 5 | 2 | | 6 |
+---+---+---+---+---+---+---+---+---+---+---+---+

The JP2 defaults look reasonable to me:

  PRIM 1  Enable primary IDE1
SCND 1 Enable secondary IDE
ROM 1 \ROM address C800
SHA 1 /
IRQ14 1 Irq14 \
IRQ10 0 -no-Irg10 > IDE#1
DRQ5 0 -no-DMAewq5 >
DACK5 0 -no-DMAack5 /
IRQ15 1 Irq15 \
IRQ12 0 -no-Irq12 > IDE#2
DRQ6 0 -no-DMAreq6 >
DACK6 0 -no-DMAack6 /

If you have only one hard drive - you could try removing SCND, but it shouldn't make a difference.

I saw mentioned earlier that you have taken one jumper OFF, and later that the ROM address is D800 - that would be the ROM jumper?
- Your screenshots show the SiiG EIDE ROM startup, and as long as you are still getting that, all is good!

Do these match the settings on your board?

https://dunfield.themindfactory.com ; "Daves Old Computers" ; SW dev addict best known:
ImageDisk: rd/wr ANY floppy PChw can ; Micro-C: compiler for DOS+ManySmallCPU ; DDLINK: simple/small filecopy(w/o netSW)via Lan/Lpt/Com

Reply 182 of 188, by DaveDDS

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Jo22 wrote on 2026-07-23, 16:56:

...It also has an extra floppy controller. I hope it 's been set to disabled if the Epson's floppy controller is used.

Does the Epson have a separate floppy controller?

So far the system was able to boot the Reference diskette ... so I doubt there's a major problem in floppy configuration.
- and I don't think a misconfigured/duplicate floppy could cause the problems being seen.

https://dunfield.themindfactory.com ; "Daves Old Computers" ; SW dev addict best known:
ImageDisk: rd/wr ANY floppy PChw can ; Micro-C: compiler for DOS+ManySmallCPU ; DDLINK: simple/small filecopy(w/o netSW)via Lan/Lpt/Com

Reply 183 of 188, by jude1977

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hi just a quick update i decided to take the pc to a computer repairer to try and replace the dead cmos battery he had a look at it and thinks hell be able to replace the
cmos battery with a new cmos battery he said it will probably take a week or 2 to get the new cmos battery and install it
so hopefully that will make the trouble shooting a bit easier and ill be able to save the settings so
will keep you all posted and let you know when i get the pc back

Reply 184 of 188, by DaveDDS

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jude1977 wrote on Yesterday, 09:17:

... he said it will probably take a week or 2 to get the new cmos battery and install it ...

Ok, good - soujnds like he's going to replace the Dalas DS12887 RTC chip

Just a quick note/suggestion this chip as you know contains an internal battery which will eventually go dead.

Dallas ships the chip with the battery backup turned off - it turns on the first time it gets used.
and Dallas says it should last 10 years after 1st use.

But... these have been around a long time and you can't know for sure that the one you get has never been activated...

So... I'd suggest that you go back to him and ask if he can put it in a socket which will make it *much* easier to replace if you have to again.

And - if you are interested in this kind of thing, you might want to ask to get the old one back so you can try grinding it down and replacing the battery.

https://dunfield.themindfactory.com ; "Daves Old Computers" ; SW dev addict best known:
ImageDisk: rd/wr ANY floppy PChw can ; Micro-C: compiler for DOS+ManySmallCPU ; DDLINK: simple/small filecopy(w/o netSW)via Lan/Lpt/Com

Reply 185 of 188, by jude1977

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thanks for the advice will ask him about the socket and ill see if i can get the old one back too

Reply 186 of 188, by DaveDDS

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FWIW - there are 3rd party replacement RTC chips that have user-replaceable batteries

Check this thread: DS12887 drop-in replacement

https://dunfield.themindfactory.com ; "Daves Old Computers" ; SW dev addict best known:
ImageDisk: rd/wr ANY floppy PChw can ; Micro-C: compiler for DOS+ManySmallCPU ; DDLINK: simple/small filecopy(w/o netSW)via Lan/Lpt/Com

Reply 187 of 188, by DaveDDS

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I've been playing a bit with "PCem" ... and today I noticed that one of the machines it allows you to emulate is: [286] Epson PC AX2e

So I gave it a try - it can boot the "reference" disk, I can run setup and it does allow me to save the settings!

But --- At startup It always gives the error: "8602 - Auxiliary device failure"
It also always sez "System options not set" - but I can see that changes I made are in fact retained (even if I completely exit and re-run PCem) - so it does seem to be saving to some extent.

I also note than within setup "Mass storage", I can configure the floppy drives (A: & B:) , but NOT the hard drives (C: & D:) which always show "Type63" and when I move to them sez:
"HDD1 (Reserved!! Can't set)"
"HDD2 (Reserved!! Can't set)"

I have no idea how accurate PCems hardware emulation is,what the "auxiliary device" is, or why these drives can't be set (may all be a red-herring - but it's interesting)

https://dunfield.themindfactory.com ; "Daves Old Computers" ; SW dev addict best known:
ImageDisk: rd/wr ANY floppy PChw can ; Micro-C: compiler for DOS+ManySmallCPU ; DDLINK: simple/small filecopy(w/o netSW)via Lan/Lpt/Com

Reply 188 of 188, by jude1977

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hi thats very interesting to know that ill give pcem a try as well thanks for letting me know