Commodore Plus 4 - Page 446

434 Appendix G
Memory Location(S)
Hexadecimal
Decimal
Usage
$04A5-$04AF 1189-1199
$04B0-$04BA
$04BB-$04C5
$04C6-$04D0
$04Dl-$04DB
$04DC-$04E6
$04E7
S04E8
$04E9
$04EA
$04EB-$04EE
$04EF
$04F0-$04Fl
$04F2-$04F3
$04F4
$04F5-$04F6
$04F7
$04F8-$04F9
$04FA-$04FB
$04FC
$04FD
$04FE
$04FF
$0500-$0502
$0503-50507
$0508
$0509-$0512
$0513-$051C
$051D-$0526
$0527-$0530
$0531-$0532
$0533-$0534
$0535
$0536
$0537
$0538
$0539
$053A
1200-1210
1211-1221
1222-1232
1233-1243
1244-1254
1255
1256
1257
1258
1259-1262
1263
1264-1265
1266-1267
1268
1269-1270
1271
1272-1273
1274-1275
1276
1277
1278
1279
1280-1282
1283-1287
1288
1289-1298
1299-1308
1309-1318
1319-1328
1329-1330
1331-1332
1333
1334
1335
1336
1337
1338
Fetch RAM via BASIC text pointer
($3B),Y
Fetch RAM from ($22),Y
Fetch RAM from ($24), Y
Fetch RAM from ($6F),Y
Fetch RAM from ($5F),Y
Fetch RAM from ($64),Y
PRINT USING symbol for blank
PRINT USING symbol for comma
PRINT USING symbol for decimal point
PRINT USING symbol for dollar sign
Temporary storage for string functions
Number of latest error
Line number of latest error
TRAP line
Temporary storage for TRAP
BASIC text pointer at latest error
BASIC stack pointer at latest error
DO storage of BASIC text pointer
DO storage of line number
Low byte of sound 1 duration
Low byte of sound 2 duration
High byte of sound 1 duration
High byte of sound 2 duration
USR function jump instruction
Random number registers
Checked for cold/warm start ($A5=warm)
Table of OPEN logical file numbers
Table of OPEN device numbers
Table of OPEN secondary addresses
Keyboard queue
Bottom of memory
Top of memory
Timeout flag (DMA)
EOF flag (DMA)
Number of bytes in buffer
Valid bytes in buffer
Pointer to buffer
Type of current tape file