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ECN-0132
Title Borris2 motherboards with floppy adapter board
Equipment All desks with a Borris2 motherboard and FAB 2150A adaptor board.
Author Alwyn Fernandes
Drawing No none
Date 13th November 2000

 

Reason for ECN The Borris2 motherboard occasionally fails to recognise the Disk drive in the console. 
Special Parts Required IC 74HC245 - Octal Bus Transceiver
Part No: 05-03-0296
Special Tools Required none

 

Work Required
Borris2 motherboards using the floppy chip adapter board should have IC507 (next to the floppy chip socket) as 74HC245 not 74LS245 as currently fitted.

Note 74HC245 is not the same as 74HCT245.

Ensure that the GAL fitted for Katya is Katya60.