[BBC-Micro] Reviving a dead BBC+
mike at jasper.org.uk
Sat Apr 19 11:06:49 BST 2008
In article <7302029D805D4B40A0EA72FCEF2114F1 at KenLowePC>, Ken Lowe
<ken.lowe at btopenworld.com> writes
>Sorry for the delay in responding to everyone, and thanks Mike for the offer
>of a replacement 6512.
NP. Good to hear you got it going; just out of interest, did you feel
the RAM chips with the back of a finger to see if you could detect any
>Next in line for replacement was the RAM. The B+ uses 8 off 120ns 4864s
>(HM4864AP-12). I managed to find some 150ns 4864s (HM4864P-2) but I wasn't
>sure if these would work.
4164s would have worked too.
>I intend to get hold of another 32K RAM chip and build a small circuit borad
>that will hold both 32K RAM chips, and a single 32K ROM. This circuit board
>will then plug into one of the existing ROM sockets, with flying leads to
>the three external points highlighted above, and a fourth to pick up page
>0/1 select. This should provide me with a fully expanded 128K B+ with all
>ROM sockets still available.
Very nice :) I'd like to see photos of that if possible.
(\__/) Bunny says NO to Windows Vista!
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