26 Oct
2018
26 Oct
'18
6:56 p.m.
From: Rob Jarratt
The chips where I believe the RESET is oscillating on
pin 23 have been
labelled E151 and E152 ... But I am not really sure if I have
identified them and the pin correctly.
E151 is the main CPU chip:
http://gunkies.org/wiki/F-11_chip_set
E152 is the KEF11-A floating point chip, and E150 is the KTF11-A memory
management chip.
Pin 1 of E150 is definitely in the lower left corner (in the photo); there's
an indent on the left-hand side of the chip, for the usual DIP orientation.
I'm pretty sure the other two have the same orientation.
Noel