MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
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robertjhurst

United Kingdom
2 Posts
Posted - 04/12/2023 :  01:44:11  Show Profile  Reply with Quote
Hi all, I'm trying to read the contents of the above to make a backup file, but can't find it on the list of devices.

I'm using a GQ-4X programmer.

There is a datasheet for the device here: h**p://www.limpulsion.fr/upload/docs/DM52B33H300.PDF

Can anybody advise how I might proceed?

Many thanks.
Edited by - robertjhurst on 04/12/2023 01:45:50
Reply #1

anniel

2572 Posts
Posted - 04/12/2023 :  06:11:41  Show Profile  Reply with Quote
quote:
Originally posted by robertjhurst

Hi all, I'm trying to read the contents of the above to make a backup file, but can't find it on the list of devices.

I'm using a GQ-4X programmer.

There is a datasheet for the device here: h**p://www.limpulsion.fr/upload/docs/DM52B33H300.PDF

Can anybody advise how I might proceed?

Many thanks.


Start with the 27C64 and drop VPP to 5V.
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Reply #2

robertjhurst

United Kingdom
2 Posts
Posted - 04/12/2023 :  23:12:52  Show Profile  Reply with Quote
quote:
Originally posted by anniel


Start with the 27C64 and drop VPP to 5V.


Ok, thanks. I was trying to use a 27C64 as a drop in replacement as they are a lot more available. The machine wouldn't recognise it though so wanted to copy the prog across in case it needs a format.
What's the deal with Pin 1? Tied high on the 52B33, I've left it floating on the 27C64

Many thanks.
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Reply #3

anniel

2572 Posts
Posted - 04/13/2023 :  04:46:33  Show Profile  Reply with Quote
quote:
Originally posted by robertjhurst

quote:
Originally posted by anniel


Start with the 27C64 and drop VPP to 5V.


Ok, thanks. I was trying to use a 27C64 as a drop in replacement as they are a lot more available. The machine wouldn't recognise it though so wanted to copy the prog across in case it needs a format.
What's the deal with Pin 1? Tied high on the 52B33, I've left it floating on the 27C64

Many thanks.


Pin 1 on the 52B33 if low should erase all the chip.
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