30 Sep
2006
30 Sep
'06
5:38 p.m.
> On thing I'm curious about is the jumpers
inside the software drawer. Any
> docs on those? It may be coincidence, but all the jumpers (one for each H/L
Extracted from the Technical Reference Manual.
Small group (sockets 0 and 1)
XW1
Banks 0 and 1 : Independant ROM pairs -- A
Independant EPROM pairs -- B
Large group (sockets 4, 5, 6, 7)
XW2 XW3 XW4 XW5 XW6
Banks 4,5,6,7 : Independant ROM pairs -- A A A A A
Banks 4,5,6,7 : Independant EPROM pairs -- B - B B B
Bank 7 : Up to 4 cascaded pairs of 32K ROM A B B B B
Bank 7 : Up to 4 cascaded pairs of 32K EPROM B B B B B
Where '-' means don't care.
The cascaded modes let you use 4 pairs f sockets to emulate a 128K ROM.
They are fitted in order 5 6 7 4 (not the obvious one!), and appear as
bank 7. Banks 4,5,6 do not exist in this mode.
The factoru configuration is to have all jumpers in position A, that is
for indepenadnnt ROMs in all banks.
-tony