Looking for a replacement eeprom for Macronix MX 28F1000PL \ VOGONS

Looking for a replacement eeprom for Macronix MX 28F1000PL

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First post, by Robin4

Posted on 2023-01-14, 20:50

Robin4 Offline

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As the title already reveals, iam looking for a eeprom replacement for an Macronix MX 28F1000PL

As it seems, its not compatible with an Intel P28F001BX-T or a ST SST PH29EE010. Guessing the have a different pin lay-out.

Is there a 1:1 substitute for this IC?

~ At least it can do black and white~

Reply 1 of 5, by Horun

Posted on 2023-01-14, 22:52

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The MX is a block type 16kx6 block + 4kx4 (112k +16K), Intel BX-T is a block type 112k + 4kx2 + 8k (112k + 16k). The pinouts appear the same from the datasheets so if BX-T is programmed from a external programmer it should work but I quickly checked the data so maybe not..

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 5, by Robin4

Posted on 2023-01-14, 22:54

Robin4 Offline

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Do you know a substitute for the MX part? Or is this the only part with that configuration?

My Mini pro TL866CS cant read the chip in almost every chip selection.. I tried different ones, but those doesnt seems to work.

~ At least it can do black and white~

Reply 3 of 5, by Horun

Posted on 2023-01-14, 23:40

Horun Offline

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Hmm maybe something wrong with the eeprom, from TL866 device list: MX28F1000P, MX28F1000P @PLCC32, MX28F1000P @TSOP32 reading the software support list.
http://www.autoelectric.cn/MiniPro/MiniProSupportList.txt

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 4 of 5, by Robin4

Posted on 2023-01-15, 01:33

Robin4 Offline

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I thought the same on maybe bad eeprom.

Do you know a substitute for the MX part? Or is this the only part with that configuration?

Should this be the same:

MX28F1000P

Only difference on mine is the L behind the P (maybe its an low voltage one)

~ At least it can do black and white~

Reply 5 of 5, by mbarszcz

Posted on 2024-11-13, 04:54

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In case anyone stumbles across this thread in the future, the MX28F1000P is definitely a different chip than the MX28F1000PL. I needed a new BIOS chip for a PC Chips M575 but I was only able to find the MX28F1000PL available. The original chip was an rebranded Macronix MX28F1000P as "H.T. M21084" (ID: C2 1A) as a and the replacement was a MX28F1000PL (ID: C2 11).

I've been unable to find a datasheet for the MX28F1000PL, but UNIFLASH was able to report the differences between them. In uniflash:
my original MX28F1000P BIOS chip is reported as "Macronix MX28F1000P/24V, Organization: sectored: 7x16k, 4x4k (128K)
my replacement MX28F1000PL chip is reported as "Macronix MX28F1000/12V, Organization: sectored: 8x16k (128K)"

I'm not entirely sure what that extra 4x4k is, but I suspect it has something to do with what the BIOS refers to as its "NVRAM" area. With the MX28F1000PL installed, the BIOS reports "No NVRAM". With the Original it reports "NVRAM OK". This doesn't seem to have a functional impact on the system, but it must try to store something there and can't with the MX28F1000PL.

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