Panasonic JB-3300 Technical Manual page 28

BLOCK DIAGRAM
CPU Board (PLSMX) CLOCK GEN
8284A {
Co -Pro MPU
(Option)
8087 8088 4.77 MHz
BUS-CNT ROM
8288 16K Bytes
DMA-CNT RAM
8287A-5 256K Bytes
t
INT-CNT RAM
(Option)
8259A 256K Bytes
TIMER '
8263-5
I/O PORT i ee ~]
| Floppy Disk Version
K/B
I/O Board 360K Bytes | 360K Bytes
_ _ 765A O i | OQ
0 | (
{ a J
Plasma Plasma Video \ Printer I/F Parallel Port
Display = pend ,
(640x400) I/F Control (Centronics) (For Printer)
c
(to
V-RAM COM I/F
RS232C
+ 1
32K Bytes | 8250 ——{] Serial Port
| ,
| BUS Option Bus
Driver Connector x 2
See ae4
TOM Hard Disk Version |
Bytes
HDD |
|
| |
L-i- l —
Figure 3-1 Block Diagram
10