DEC VT220 Technical Manual page 209

ICR ADDRESS
£l7F4H(RD)
07 06 05 03 02
01 00
DelTA DELTA DELTA DELTA
IP3 IP2 IPI IPO
IP3 IPi
IP1
IPO
BIT VALUES
NO CHANGE OF STATE DETECTED AT IP3
CHANGE OF STATE DETECTED AT IP3
NO CHANGE OF STATE DETECTED AT IP2
CHANGE OF STATE DETECTED AT IP2
NO CHANGE OF STATE DETECTED AT IP1
CHANGE OF STATE DETECTED AT IPI
NO CHANGE OF STATE DETECTED AT iPO
CHANGE OF STATE DETECTED AT IPO
CURRENT STATE OF IP3 ITVS)
CURRENT STATE OF IP2 (SPO INDI
CURRENT STATE OF IPI IDSR)
CURRENT STATE OF IPO leTSi
... -------------------l~~(BADO H I
IBAD7
H)"
I
BIT 7
0
1
BiT 6 0
1
I
BIT 5
0
1
I
BiT 4 0
BIT 3
Oil
I
BIT 2
011
BiT
i 0/1
BiT 0
on
Figure C-7
2681 DUART: Input Change
Reg i ster (ICR)
C-6