Commodore 128 Programmer's Reference Manual page 435

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11
THE COMMODORE 128 OPERATING SYSTEM 425
17. $FFB1 LISTN ;serial: send listen command
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pi
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PREPARATION:
Registers:
Memory:
Flags:
Calls:
RESULTS:
Registers:
Memory:
Hags:
EXAMPLE:
JSR $FFB1
.A = device (0-31)
system map
none
none
.A used
STATUS ($90)
none
xommand device to
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LISTN is a low-level Kernal serial bus routine that sends a LISTEN
command to the serial bus device in .A. It commands the device to start read
ing data. (Most applications should use the higher-level I/O routines; see
ICKOUT.)
18. $FFB4 TALK ;serial: send talk
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PREPARATION:
Registers:
Memory:
Flags:
Calls:
RESULTS:
Registers:
Memory:
Flags:
EXAMPLE:
JSR $FFB4
.A = device (0-31)
system map
none
none
.A used
STATUS ($90)
none
xommand device to
TALK is a low-level Kernal serial bus routine that sends a TALK command
to the serial bus device in .A. It commands the device to start sending data. (Most
applications should use the higher-level I/O routines; see ICHKIN.)
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