Tandy 1000 SL Technical Reference Manual page 259

sET/REIu) SCAN SET
-
FO HeX
This camand is used t o select one of three
Scan
Sets
or to tell
t h e host system which
Scan Set
is c u r r e n t l y being used.
T h i s
canaMnd
c o n s i s t s of a cumand byte and a paraneter
byte.
Upon
receiving this camand, t h e keyboard sends an Acknowledge t o t h e
h o s t system and waits f o r t h e parameter byte. When the keyboard
receives the paramter byte, it responds with an Acknmledge.
Aparamter byte of 00
H e x
w i l l cause t h e keyboard t o transmit
t h e
Hex
value f o r t h e
Scan Set
c u r r e n t l y i n use.
A
paramter
byte of 01 H e x
selects t h e
Scan
Set
1 (XT
Scan
Codes), 02
Hex
selects
Scan Set
2 (Default
AT Scan
Codes)
,
and 03
Hex
selects
Scan Set
3 (Special
AT
Scan Codes
--
See Table
3
for Scan Codes
and Default Key
State
Information). The keyboard r e m s
scanning t h e matrix.
20