Apple Lisa - Page 41

Confidential
Lisa Hardware Reference Manual
Control Bit Addresses
Bit Set Address
Reset Address
- -----_.
._------
CO $00D002
$OODOOO
C1
$00D006
$00D004
C2 $OODOOA
$00D008
C3 $OODOOE
$OODOOC
C4 $00D012
$00D010
C5 $00D016
$00D014
C6 $00D01A
$OODOlS
7201 Regis ter
Addresses
Channel 1
Data: $000041
Control: $00D045
Channel 2 Data: $000043
Control:
$00D047
Note that the 7201 baud clock is at 16 times the baud rate in all the
cases given above. For 9600 baud, for example, the clock runs at
153.5 KHz. It is possible to program the 7201 to use the xl clock in
synchronous communications, so baud rates up to 307 Kilobaud are
possible.
Page 41
7-Jul-81