EPROM adaptor boards

[mikek400]

Board

Board

I'm interested in a bare board if you have any.

 

[Keir]

I'm interested in a bare board if you have any.

I think I have some of my old boards spare, for 27C400 only (not 27C800/160), if that suits?

 

[soviet9922]

Hi i want one?, there still stock ?, also this one work on the my cheap usb G540?

 

[squale]

Received mine today, thanks again

 

[Keir]

Hi i want one?, there still stock ?, also this one work on the my cheap usb G540?

Yes I still have them in stock. However I am not sure it will work with your G540, as it does not appear to support the 27C4096 device. So you would need a new programmer (eg TL866CS) as well as the adaptor.

 

[mikek400]

I'm interested in a bare board if you have any.

I think I have some of my old boards spare, for 27C400 only (not 27C800/160), if that suits?

How much for one? And how difficult would it be to rewire it to make it compatible.

Thanks.

 

[soviet9922]

I have a question how this work, the burner software have an option tu burn the first pass then you change the jumper to the second bank burn the second pass and change the jumper again ?

 

[Keir]

I'm interested in a bare board if you have any.

I think I have some of my old boards spare, for 27C400 only (not 27C800/160), if that suits?

How much for one? And how difficult would it be to rewire it to make it compatible.

Thanks.

£2 + post. You'd have to work out what to do with the extra two pins (1 & 42) of 27C800/160 devices. eg bend them up and bodge them to logic 1 or 0 to program sections of the full EPROM space.

- - - Updated - - -

I have a question how this work, the burner software have an option tu burn the first pass then you change the jumper to the second bank burn the second pass and change the jumper again ?

Yes, let's say you want to burn a 2MB (16Mbit) ROM image to a 27C160. You must burn in 512kB (4Mbit) sections. So the ROM image must be split into 4 pieces let's say im00.rom, ..., im03.rom. Set the jumpers to 00, then burn im00.rom. Set the jumpers to 01, then burn im01.rom. And so on through im11.rom. Done.

So you need a way to split a ROM image in this case. On these 16-bit EPROMs you may also need a way to 'byte swap' ROM images to fix 16-bit endianness -- this is generally true for Amiga Kickstart images for example. On Linux or MacOS you could use 'dd' command-line tool for either/both of these tasks.

 

[Keir]

Bump. I have just assembled another 20 adaptors ready for sale.

 

[keropi]

got any tool that can split larger files to 512kbyte segments?

 

[Kiro]

declare interest in one adapter, PN follows

 

[dalek]

Interested in one - PMing

 

[Zickendoktor]

Interested in at least one! PM!

 

[Keir]

got any tool that can split larger files to 512kbyte segments?

Not for Windows, though I'm sure they exist. You also need to be able to split out even/odd words for two-ROM systems. And you need to be able to byte swap within each word.
I have such a tool for Linux command line.

 

[Keir]

Interested in one - PMing

Payment received and your adaptor is in the post today.

 

[Kiro]

Payment sent.

 

[Keir]

Payment sent.

Received and the adaptor will be in the post tomorrow.

 

[keropi]

I have found that this small/free file splitter works fine without adding anything extra in the files it outputs: http://www.filesplitter.org
So after splitting to odd/even and then byte-swapping one can use this little program to create 256kb chunks.

 

[Keir]

Interested in at least one! PM!

Payment received from Zickendoktor for 6 adaptors, which will be posted to Germany today by International Tracked & Signed service.

 

[Kiro]

adapter arrived today in good conditions, thx!