reading 27c 128 stock vn eprom

EPROM EEPROM SRAM NVRAM Flash chips, reading/writing hardware and software
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vn_ss_cm
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reading 27c 128 stock vn eprom

Post by vn_ss_cm »

Hello guys

I Have a standard vn 27c 128 eprom that has a modded tune on it and hage trouble reading it. I have the settings correct and when you hit read it seems like it reading but all i get is blocks of 00...the eprom works.fine in the car

Using willem eprom programmer which i know works fine.
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Holden202T
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Re: reading 27c 128 stock vn eprom

Post by Holden202T »

how are you reading it, with an adaptor in the original memcal or are you removing the eprom from the memcal to read in programmer ?
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j_ds_au
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Re: reading 27c 128 stock vn eprom

Post by j_ds_au »

When you say you know the programmer works fine, have you at least read another 27C128 to confirm this (and that it's correctly configured)?

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antus
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Re: reading 27c 128 stock vn eprom

Post by antus »

Sounds like bad connections to the eprom, but it could be settings, or bad connections anywhere. There is no reason it shouldnt work, you just need to check and re-check everything. If its an old school Willem (parallel port), on a modern computer there are a bunch of problems with that too which is the reason a true usb such as gq-4x is preferred.
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