Oki B4100 - Manual (Page 488)

40055101TH Rev.4 488 /
A3.10 MEMO (memory) Circuit Diagram for OKIOFFICE 44/OKIFAX 4100 (option)
By mounting this optional memory board (MEM/MEM-2), it can be used for the expansion memory.
1. Block diagram
Figure A3.10.1 shows a related signal of memory board.
MEMO/MEMO-2 circuit consists of the following block.
1) 512 kbyte pesudo static RAM x 4 (RAM1 to RAM4).
Used as follows:
•
Picture memory for the ECM send/receive modes.
• Picture memory for the memory transmission mode.
• Picture memory for the retransmission data.
• Picture memory for the reception in memory
2) Memory capacity
• One of 512 kbyte (MEMO) or 1 Mbyte (MEMO-2) memory board can be added for
OKIOFFICE 44/OKIFAX 4100.
The relationship between memory capacity and mounted boards are shown in the following
table
Equipment
OKIOFFICE 44
/OKIFAX 4100
Memory
Capacity
512 kbyte
1 Mbyte
Mounted
Mounted
Not mounted
Mounted
Not mounted
Not mounted
Not mounted
Not mounted
MEMO
MEMO-2
RAM1 RAM2 RAM3 RAM4 Mounted
Board Name
Note: OKIOFFICE 44/OKIFAX 4100 does not back-up the message received in memory
for the power failue.