Data Dictionary

LN[] = ARRAY HOLDING LINE NUMBERS
LI[] = ARRAY HOLDING INDEX IN PM[] WHERE THE CODE FOR THIS LINE IS STORED
LL[] = ARRAY HOLDING NUMBER OF BYTES IN PM[] THAT THE LINE TAKES
LC[] = ARRAY HOLDING INDEX TO NEXT LINE
LG[] = LINKED LIST ARRY FOR GARBAGE COLLECTOR
PM[]$ = ARRAY TO HOLD OUR CODE

IO$ = INPUT/OUTPUT STRING
AR$ = TEMP STRING TO HOLD THE CURRENT ARGUMENT

AR = CURRENT INDEX IN CM$ TO FIND NEXT ARGUMENT 'AR$
NB = FLAG FOR IS AR$ A NUMBER
PL = CURRENT LINE WE ARE PARSING
PI = CURRENT PARSE INSTRUCTION
ER = ERROR NUMBER

DC$ = DRAWING COMMAND LIST
IC$ = IMMEDIATE COMMAND LIST
CM$ = CURRENT COMMAND
CH$ = CURRENT CHARACTER
IX = CURRENT TEMP INDEX
IC = TEMP COUNTER
CM = CURRENT COMMAND FUNCTION NUMBER
AC = CURRENT ARGUMENT NUMBER
AL = VAL(AL$)
MT = CURRENT TOP OF MEMORY IN PM
MM = MAX AMOUNT OF MEMORY
MR = MEMORY REQUEST IN BYTES
MP = MEMORY POINTER RETURNED BY MEMORY MANAGER
ML = MAX LINES
CP = CURRENT POINTER
HP = HEAD POINTER
PP = PREVIOUS POINTER
LL = Last Line Index we checked (for adding a new node, so we don't search the whole array)
LF = Out of line indexes flag (used with above  see if we have rolled around the array yet)
IP = Instruction Pointer
IO = READ/WRITE BYTE

GARBAGE COLLECTOR
LX = Lowest Index
LP = Lowest Pointer
CI = Current Index
GH = Garbage List Head Pointer
GP = Garbage Previous
TP = Temp Pointer

INTERPRETER
MH = Maximum Horizontal Resolution
MV = Maximum Vertical Resolution
MC = Maximum Color Number
PA[]= Common Color Pallete
BR[] = Brushes
HR = Horizontal Resolution
vR = Vertical Resolution
XO = XOFFSET
YO = YOFFSET
X1 = CURR X
Y1 = CURR Y
X2 = TEMP X
Y2 = TEMP Y
A0 = Temp Argument0
A1 = Temp Argument1
A2 = Temp Argument2
A3 = Temp Argument3
HZ = Horizontal Zoom
VZ = Vertical Zoom
DM = DRAW MODE (0=TOPLEFT,1=CENTER,2=STRETCH)
CB = CURRENT BRUSH

ERROR CODES:

ERROR OVER 100 ARE CRITICAL ENDS PROGRAM

1 EXPECTED COMMAND (GOT NUMBER)
2 BAD COMMAND
3 BAD VALUE (EXPECT NUMBER GOT STRING)
4 NOT ENOUGH ARGUMENTS
5 TOO MANY ARGUMENTS
6 OUT OF MEMORY
7 BAD LINE NUMBER
8 OUT OF LINES
9 BAD DRAW MODE
10 X OUT OF BOUNDS
11 Y OUT OF BOUNDS
12 COLOR NOT SUPPORTED
20 SAVE ERROR
21 LOAD ERROR

404 NOT IMPLEMENTED YET

COMMON COLOR-9

0 BLACK
1 RED
2 ORANGE
3 YELLOW
4 GREEN
5 BLUE
6 INDIGO
7 VIOLET
8 WHITE