Radio Shack TRS-80 Model III - Page 93

OPERATION
Summary of
Important
RAM Addresses
Ad<
dress
Contents
Initial
Contents
Dec
Hex
16396
400C (BREAK) Jump
Vector
Keyboard scan operations
Three
bytes
C9 xx xx
16409
4019 Caps Lock
Switch
=
"Upper
and
Lower Case"
Not0
=
"Caps Only"
"Caps"
16412 401
C
Cursor Blink Switch
=
"Blink"
Non-Zero
=
"No-Blink"
"Blink"
16416 4020
Cursor Address
Two bytes: LSB, MSB
N/A
16419 4023
Cursor Character
ASCII Code 32
—
255
176
16424 4028
Maximum
Lines/Page
plus one
67
16425 4029
Number of
lines printed
plus one
1
16427 402B
Line Printer Max.
Line
length less two.
255
=
"No Maximum"
"No Max"
16872
41
E8
$RSRCV Input Buffer
One
byte
16880 41 F0
$RSTX Output Buffer
One
byte
16888 41 F8
$RSINIT Baud
Rate Code
TXCode
=
MostSig. Nibble
RCVCode
=
Least Sig.
Nibble
85
16889 41 F9
$RSINIT
Parity/Word
Length/
Stop-Bit Code
108
16890 41 FA
$RSINIT WAIT
Switch
=
"Don't
Wait"
Non-Zero
=
"Wait"
"Wait"
16913 4211
Cassette Baud Rate
Switch
=
500
Baud
Non-Zero
=
1500 Baud
N/A
83