nextse7en wrote on 2021-04-14, 15:57:

When powering up, I get the following beep code |-|-|||.

according to http://www.bioscentral.com/beepcodes/phoenixbeep.htm that would indicate

1-1-3 CMOS read/write error The real time clock/CMOS is faulty. Replace the CMOS if possible

Which probably means the battery in the DS1287+ is dead.

but since you already tried all that...

beats me.

Have you tried modifying the old DS1287+ with a new battery ? (isn't listed in the things you've tried. 😀 )

weedeewee wrote on 2021-04-14, 16:22:

Have you tried modifying the old DS1287+ with a new battery ? (isn't listed in the things you've tried. 😀 )

Is is, though. 😀

Can you change the FSB speed on that board? If so, what's it set at? Isn't the DX50 unique in that it runs on a full 50MHz FSB? Just a thought. No idea.

liqmat wrote on 2021-04-14, 16:41:

Can you change the FSB speed on that board? If so, what's it set at? Isn't the DX50 unique in that it runs on a full 50MHz FSB? Just a thought. No idea.

There aren't any options to change bus speed, and yeah, you're right. The bus on DX50's runs at 50 MHz

nextse7en wrote on 2021-04-14, 16:29:

weedeewee wrote on 2021-04-14, 16:22:

Have you tried modifying the old DS1287+ with a new battery ? (isn't listed in the things you've tried. 😀 )

Is is, though. 😀

is not :-p

Replacing Dallas 1287+ with a new one.
Modifying new 1287 with a battery pack.
Replacing 1287+ with a glitch works replacement

maybe someone else already changed it once and it's no longer the original chip on the board? Hard to find other clear images.

edit : you know since this is an EISA board... maybe you need a DS1387

weedeewee wrote on 2021-04-14, 16:56:

is not :-p […]
Show full quote

nextse7en wrote on 2021-04-14, 16:29:

weedeewee wrote on 2021-04-14, 16:22:

Have you tried modifying the old DS1287+ with a new battery ? (isn't listed in the things you've tried. 😀 )

Is is, though. 😀

is not :-p

Replacing Dallas 1287+ with a new one.
Modifying new 1287 with a battery pack.
Replacing 1287+ with a glitch works replacement

maybe someone else already changed it once and it's no longer the original chip on the board? Hard to find other clear images.

edit : you know since this is an EISA board... maybe you need a DS1387

You're looking at the image, which was taken after I removed the battery pack.

"Modifying new 1287 with new battery pack" Means I put a new battery on a new Dallas chip.

nextse7en wrote on 2021-04-14, 17:36:

"Modifying new 1287 with new battery pack" Means I put a new battery on a new Dallas chip.

Yes I saw that, and I specifically asked to use the OLD chip that was on the board and put a NEW battery on that one. Not use a NEW dallas chip with a NEW battery.
but then again, as I said in a previous post, I wouldn't be surprised if it was actually a DS1387 that you need.

It shipped, unfortunately, with a 1287

nextse7en wrote on 2021-04-14, 17:43:

It shipped, unfortunately, with a 1287

And have you seen it working with that 1287 ?

This feels oddly combative. I'm not sure why.

I have seen images of this board fitted with a 1287+ working on the internet.

I have not seen my board working under any circumstances.

just trying to get a clear picture 😀

Since it's an eisa board it has to store that config somewhere and I don't see a ds1225 so it either has to be in the RTC which won't work with a DS12(8)87 (only 64bytes),
or there has to be another chip on the board that stores that info, either battery backed like a DS1225 or an eeprom specifically for the eisa config, maybe a 24C08 or other type.

This board requires two set of matched 4MB or 8MB or 16MB 9 chip or 12 chip, or parity SIMMs industry standard at 70ns installed in slot 1 and 2 or slot 1 and 3 just in case. This was intended for server. Intel's code name for this is called Xpress.

Cheers,

Board is from a X-series LX desktop / deskside / rack system - the EISA config is stored in NVRAM rather than a DALLAS

http://66.113.161.23/~mR_Slug/deviceInfo/Inte … l/xpressLX.html

http://66.113.161.23/~mR_Slug/deviceInfo/Inte … al/XLX_TRM.html

PC Hoarder Patrol wrote on 2021-04-14, 19:03:

Board is from a X-series LX desktop / rack system - the EISA config is stored in NVRAM rather than a DALLAS

http://66.113.161.23/~mR_Slug/deviceInfo/Inte … l/xpressLX.html

What chip (... 8 KB of Flash memory ) might that be on this particular board ?

Probably one of the two labelled ICs top-right (and close to the NVRAM / RTC reset jumper)

pentiumspeed wrote on 2021-04-14, 18:46:

This board requires two set of matched 4MB or 8MB or 16MB 9 chip or 12 chip, or parity SIMMs industry standard at 70ns installed in slot 1 and 2 or slot 1 and 3 just in case. This was intended for server. Intel's code name for this is called Xpress.

Cheers,

This may well be the issue!

I currently have 16 chip non parity 8mb chips installed in 1 and 3. I don't have any 9 or 12 chip ram.

I do have 18 chip parity 8mb Simms, will that work?

18 chips means 9 per side 4MB, 4MB is 8MB simm, sure thing, give it a try, make sure it is FPM also.

Cheers,

Sorry no helpful info from me. Being a bastard dual cpu on a card mobo and EISA too just leaves a lot of nightmare type memories better forgotten 😀