Commodore Plus 4 - Page 443

Appendix 6 431
Memory Location(S)
Hexadecimal
Decimal
Usage
$00CD
$00CE
SOOCF
$00D0-$00D7
$00D8-$00E8
$00E9
$00EA-$00EB
$00EC-$00ED
SOOEE
SOOEF
SOOFO
$00Fl-$00F4
SOOF5
$00F6
S00F7
SOOF8
$00F9
$00FA
SOOFB
$00FC
$00FD
SOOFE
SOOFF
$0100-$010F
$0110-$0112
$0113-50122
$0123-$01FF
$0200-$0258
$0259-$025A
$025B-$025C
$025D
$025E-$026D
$026E
$026F
$0270-50271
205
206
207
208-215
216-232
233
234-235
236-237
238
239
240
241-244
245
246
247
248
249
250
251
252
253
254
255
256-271
272-274
275-290
291-511
512-600
601-602
603-604
605
606-621
622
623
624-625
Current cursor line
Last character input
Counter for insert mode characters
Zero page area reserved for speech
software
Free zero page area for applications
Segment size for CIRCLE
Address of current color line
Indirect for key scan table
Temporary storage for key scan
Keyboard queue index
Flag for screen I/O pause (CTRL S/T)
Zero page area for monitor
Cassette I/O checksum
Zero page location for monitor
Pass number for cassette 1/ O
Type of cassette block
Flag for DMA disk ($00=not present,
$80=present)
Temporary storage for .X during stop key
check
Number of ROM bank currently enabled
X-on character for RS232 I/O
X-off character for RS232 I/O
Temporary storage for cursor line in editor
Used as base address for indexing forward
Floating point operation buffer
Temporary storage for .A, .X, .Y during
I/O
RAM color/luminance table for color keys
Processor stack
Input buffer
Last BASIC line number
Last BASIC text pointer
Loop counter for DOS
Buffer for disk file name
Length of disk file name 1
Drive for disk file 1
Address of disk file name 1