”
A/DI/O
“”“Where”—
“”“When”—
,
PC
CPUIntelMultI
LBXCPU1CPU2
SBX BIT
6502Z80NSC800808816
10
STD
”80
(GALPAL) (ASIC)
STD
STD
15716VME bus
31
STD
Furture bus
STD
Nu busSTE
/
BUS IRQn*
16(153016714)
VOH () VOL () VIH () VIL ()
VCC= IOH=6mA VCC= IOL=6mA VCC= IOL VCC=
3.76 3.15
0.37 0.9
2.4 2.0
0.5 0.8
EPROM
MS-DOS100%IBMPC
/
DI/DO
TTL
3
I/O
STD
A/DD/A
0~10mA0~ +5V4~20mA1~5V
1μs
4~20mA D/AV/I
80PLCI/O
I/O128