Controller Pcb Block Diagram - NEC Advanced Personal Computer System Reference Manual

7220
GRAPHIC
DISPLAY
CONTROL
D8251
SERIAL
VO
DEVICE
CONTROL
8231
ARITHMETIC
PROCESSING
UNIT
1771-006
SOUNO
CONTROL
Figure 3-2 Controller PCB Block Diagram
OSl TO 4
LWC, D1R, FLR. STP. WOT. HOL. SSL. MFM.
WGT. VSYN
ROY. PRT. TSO. FUS. TKO. IDX.
ROT. WID
SD
SD. RS. ER. ST I
RD. CS. DR. RT. ST2
(O.CI
INT.14
:=3
VOLUME
Controller PCB
3-3