Commodore Plus 4 - Page 448

436 Appendix G
Memory Location(S)
Hexadecimal
Decimal Usage
$05F5-$065D
$065E-$06EB
$06EC-$07AF
SO7BO
S07B1
$07B2-$07B3
S07B4
$07B5
S07B6
S07B7
$07B8-$07BD
S07BE
$07BF
$07C0-$07C3
$07C4
$07C5
$07C6
$07C7
$07C8-$07CC
$07CD
$07CE
$07CF
S07D0
1525-1629
1630-1771
1772-1967
1968
1969
1970-1971
1972
1973
1974
1975
1976-1981
1982
1983
1984-1987
1988
1989
1990
1991
1992-1996
1997
1998
1999
2000
$O7D1
$07D2
2001
2002
S07D3
$07D4
$07D5
$07D6
$07D7
$07D8
$07D9-$07E4
2003
2004
2005
2006
2007
2008
2009-2020
$07E5
2021
Banking RAM area
RAM reserved for speech software
BASIC stack
Tape byte to write
Temporary parity calculation byte
Temporary storage for tape header write
Free
Temporary index for reading bytes
Pointer to error stack
Count of errors on initial pass
Constants for timing
Pointer to stack for STOP recover
Pointer to stack for drop key recover
Read block parameters
Temporary status for read block
Count of leader shorts to find
Count of read errors fatal
Temporary storage for VERIFY
Temporary storage for tape I/O
RS232 data character to send buffer
RS232 flag for data character to send
($00=no, $80=yes)
RS232 control character to send buffer
RS232 flag for control character to send
($00=no, $80=yes)
RS232 pointer to current start of input
queue
RS232 pointer to current end of input
queue
RS232 current count of input queue
RS232 status
RS232 temporary storage of character
input
RS232 flag for local hold off
RS232 flag for remote hold off
RS232 flag for presence of ACIA
Indirect indexed RAM fetch routine via
contents of $07DF
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