22 Nov
2006
22 Nov
'06
5:16 p.m.
Charles H. Dickman wrote:
[ snip out ascii art failure ]
-chuck
-----
Notes on the Clearpoint Q-RAM 44B memory card
Jumpers
1 0 |
A ooo |
|
B ooo 3 |
ooo 2 |
ooo 1 |
|
C ooo b1 |
ooo b0 |
|
D ooo 1M |
ooo 512k |
ooo 256k |
|
E ooo 21 F ooo |
ooo 20 ooo |
ooo 19 ooo |
ooo 18 |
---|
|
|
-----------------------------
A: 18 bit Q-Bus
1 = 18bit, 0 = 22bit
B: Parity Memory CSR Address
base address is 17772100 + bit jumpers
C: Chip size select
b1: bank 1: 1 = 256k chips, 0 = 64k chips
b0: bank 0: 1 = 256k chips, 0 = 64k chips
D: Memory Size
1M: 1 = 2M, 0 = 1M
512k: 1 = 1M, 0 = 512k
256k: 1 = 512k, 0 = 256k
E: Base address
1 = adr bit, 0 = adr bit
F: ?