Who here has a Data I/O System 29B EPROM Programmer?

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macnoyd's picture
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Joined: Oct 15 2012
Posts: 242

There's a couple of reasons why I'm asking...

This question is aimed at those that have one with only 64K installed.

On the 64K model, I'm noticing that I do not get all 65536 bytes (counting byte 0) when READING a 27512K EProm.
The very last Byte is missing and I have to enter it in by hand.

Do others with the Model 29B have this issue?

The Test:
Clear all RAM in the Data I/O programmer. (Set all RAM to 00)
Invert all RAM (Set all RAM to FF)
READ (load) a 27512 EProm that has a unique value set on the LAST byte. (Say, 'CF' as an example as long as it's not FF or 00)
Finally, check the byte at location FFFF. Mine loads everything but the last byte.

Is anyone elses doing that? Is this a known issue?

Also, is there a 29B model with over 64K of RAM?

Thanks in advance.

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macnoyd

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Joined: Feb 18 2015
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Re: Who here has a Data I/O System 29B EPROM Programmer?

Which plugin and S/W rev do you have? The one I have has an older S/W rev, I will check. I hope mine still works, I have not used it in some time.
Wayne

tokabln's picture
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Joined: Dec 30 2015
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Re: Who here has a Data I/O System 29B EPROM Programmer?

Regarding your question if there is a RAM enhancement feasible... you might take a look at this page:

http://www.retroclinic.com/leopardcats/dio/dataio29b.htm

According this page a 64K version can't be enhanced.

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Kind regards from Berlin (Germany)
Torsten aka tokabln

macnoyd's picture
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Re: Who here has a Data I/O System 29B EPROM Programmer?

Tokabln is correct. I found this out when I found this upgrade instruction, so I bit the bullet and purchased yet another universal EPROM burner.
I suppose the System 29B will come in handy for the legacy EPROMs.
Thanks for the reply.

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macnoyd

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Re: Who here has a Data I/O System 29B EPROM Programmer?

Sounds correct. I remember there was a reason I did not use it for the larger eproms. Glad you got something working
Wayne