IBM RT Series Hardware Reference Manual page 70

Register/Signal
Reset Control
Reset State
Interrupt Enable
Master Reset All Bits Low 0-3
Register
Forced and 4-7
Permanent
Interrupt Master Reset Bit 0 is High, Bits 1
Identification Register
and 2 are Low, and
Bits 3-7 are
Permanently Low
Line Control Register Master Reset All Bits Low
Modem Control Master Reset All Bits Low
Register
Line Status Register Master Reset All Bits Low, except
Bits 5 and 6 are High
Modem Status Master Reset Bits 0-3 are Low
Register Bits 4-7
=
Input Signal
SOUT Master Reset High
INTRPT (RCVR Read LSR/MR Low
Errors)
INTRPT (RCVR
ReadRBR/MR Low
Data Ready)
INTRP (THRE)
Read UR/ Low
Write THR/MR
INTRPT (Modem Read MSR/MR Low
Status Changes)
•
OUT 2
Master Reset High
•
RTS
Master Reset
High
•
DTR
Master Reset High
•
OUTl
Master Reset High
Figure 12. NS16450 Reset Functions
14 5080 Peripheral Adapter