Date   : Mon, 13 Apr 2015 23:29:04 +0100
From   : flynnjs@... (Jason Flynn G7OCD)
Subject: EPROM versus ROM for BBC/B OS1.2

Does this help? :
"When replacing this with a Series 1 Operating System ROM it should
be noted  that the carrier board has rather large diameter pins, which
  sometimes damage the IC socket into which the board was fitted."

Take from: 
http://bbc.nvg.org/doc/A%20Hardware%20Guide%20for%20the%20BBC%20Microcomputer/bbc_hw_03.htm


On 13/04/2015 22:46, Storer, Darren wrote:
> Hi Noel,
>
> what size of EPROM did you program? What is the part number? E.g. 27C256.
>
> Depending on the capacity of the EPROM (E.g. 16 k) you can sometimes 
> cheat by programming an 8 k image in the top half of the EPROM too 
> (all to do with address lines).
>
> Best regards
>
> Darren
>
> On 13 April 2015@..., No?lBuhagiar <laser@... 
> <mailto:laser@...>> wrote:
>
>     Hi,
>     I have a question maybe some of you experts here would be so kind
>     to answer please, thanks.
>     Can I use an EPROM instead of ROM in my BBC-B? I tried to program
>     an EPROM with OS1.2 but it didn?t work.
>     Why didn?t it work??
>     Thanks for your help,
>     Noel
>
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