Commodore VIC-20 Programmer's Reference Manual page 187

HEX DECIMAL
DESCRIPTION
0045-0045
0047-0048
0049-004A
004B-004C
004 D
004E-0053
0054-0056
0057-0060
'0061
'0062-0065
"0066
0067
0068
■OO69-0O6E
006F
0070
0071-0072
'OO73-008A
007A-007B
008B-00SF
0091
0092
0093
0094
0095
0098
0097
'0093
0098
0O9C
009D
009E
009F
'0OA0-00A2
0OA3
00 A4
00A5
0OA6
00A7
0OA8
00A9
69-70
71-72
73-74
75-76
77
73-83
B4-86
87-96
97
98-101
102
103
104
105-110
111
112
113-114
115-138
122-123
139-143
144
145
146
147
148
149
150
1St
152
153
154
155
156
157
158
159
160-162
165
166
167
168
169
Current variable name
Current variable address
Variable pointer for FOR/NEXT
Y-save; op-save; Basic pointer save
Comparison symbol accumulator
Misc work area, pointers, etc
Jump vector for functions
Misc numeric work area
Accum#1: Exponent
Accum#1: Mantissa
Accum#1: Sign
Series evaluation conslanl pointer
Accum#i hi-order (overflow)
Accum#2; Exponent, etc.
Sign comparison, Acc#1 vs #2
Accum#1 fo-order (rounding)
Cassette buffer length/Series pointer
CHRGET subroutine (get BASIC char)
Basic pointer (within subroutine)
RND seed value
Status word ST
Keyswitch P1A; STOP and RVS flags
Timing constant for tape
Load = O. Verily-1
Serial output: deferred char flag
Serial deferred character
Tape EOT received
Register save
How many open files
Input device (normally 0)
Output (CMD) device, normally 3
Tape character parity
Byte-received flag
Direct = $80/RUN=0 output control
Tape Pass 1 error log/char buffer
Tape Pass 2 error log corrected
Jiffy Clock (HML)
Serial bit courrt/EQI flag
Cycle count
Countdown, tape write bit count
Pointer: tape buffer
Tape Write Idr count/Read pass/inbit
Tape Write new byte/Read error/inbit
cnt
Wrile start bit/Read bit err/stbit
Useful memory location
171