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 The BBC and Master Computer Public Domain Library

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Re: HCR Electronics EPROM Writer
Posted by Elson on Thursday, November 07, 2002 at 07:46:35
Jon wrote:

Hi Matt,

Thanks for the reply. I did a bit of research and found out how you could tell a eprom. As you rightly said they have the window, and also the more common ones have identifing numbers on them.

I gave using the programmer a go. I actually have the instructions and a Watford Electronics eprom deleter. Unfortunately I was unable to get it working, but I think this was just down to inexperience. I shall persist!

Thanks again for the reply.

Jon


Hi Jon,

I think the HCR programmer is the best that was produced for the BBC. I assume you have the SWR image (or ROM) that goes with it to actually use it. The latest version that I use is 4.1 (I believe), allowing me to burn in from 8K to 64K (27c512 - less power drain and heating for the PSU etc.), the latter which enables me to use only one skt on the basic model but have 4 x 16K images stacked into it, eg one of them I have as: View, ATS, and both 16ks of View Proffesional. They would appear (for example)in positions 0 4, 8 and &C but you need to know that two of the 28pins need to be connected to 2 other lines in the micro, (Qc and Qd) You can also do just 32K ones if you are short of space for 16K's!

From the initial startup page (after *EPROM) you have the menu of chip sizes to select. Then the next menu is self explatory, ie checking for a blank eprom(all locs &FF) reading - ie downloading into memory, saving loading new images and programming it) Checksums are done so you should really find it easy. I'd be interested to know how you get on

BFN

Elson

E341189@hotmail.com
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