00H -
07H „WORKING REGISTER
BANK“ 08H
BASIC TEXT POINTER – LOW BYTE 09H
ARGUMENT STACK POINTER 0AH
BASIC TEXT POINTER – HIGH BYTE 0BH -
0FH TEMPORARY BASIC STORAGE
(Available to user in BASIC CALLS to ASM routines) 10H
READ TEXT POINTER – LOW BYTE 11H
CONTROL STACK POINTER 12H
READ TEXT POINTER – HIGH BYTE 13H
START ADRESS OF BASIC PROGRAMM – HIGH BYTE 14H
START ADRESS OF BASIC PROGRAMM – LOW BYTE 15H
NULL COUNT 16H
PRINT HEAD POSTION FOR OUTPUT 17H
FLOATING POINT OUTPUT FORMAT TYPE 18H -
21H NOT USED – RESERVED
FOR USER 22H
BITS USED SPECIFICALLY AS FOLLOWS BIT
22.0H SET WHEN
„ONTIME“ STATEMENT IS EXECUTED BIT
22.1H SET WHEN BASIC INTERRUPT IS IN
PROGRESS BIT
22.2H SET WHEN
„ONEX1“ STATEMENT IS EXECUTED BIT
22.3H SET WHEN
„ONERR“ STATEMENT IS EXECUTED BIT
22.4H SET WHEN
„ONTIME“ INTERRUPT IS IN PROGRESS BIT
22.5H SET WHEN A LINE IS EDITED BIT
22.6H SET WHEN EXTERNAL INTERRUPT IS
PENDING BIT
22.7H WHEN SET, CONT COMMAND WILL WORK
23H
BITS USED SPECIFICALLY AS FOLLOWS BIT
23.0H USED AS FLAG FOR
„GET“ OPERATOR BIT
23.1H SET WHEN PRINT@ OR LIST@ IS EVOKED BIT
23.2H RESERVED, TRAPS TIMER 1 INTERRUPT BIT
23.3H CONSOLE OUTPUT CONTROL, 1 = LINE
PRINTER BIT
23.4H CONSOLE OUTPUT CONTROL, 1 = USER
DEFINED BIT
23.5H BASIC ARRAY INITIALIZATION BIT BIT
23.6H CONTROL INPUT CONTROL, 1 = USER
DEFINED BIT
23.7H RESERVED, USED TO TRAP SERIAL PORT
INTERRUPT
24H
BITS USED SPECIFICALLY AS FOLLOWS BIT
24.0H STOP STATEMENT OR CONTROL-C
ENCOUNTERED BIT
24.1H USER IDLE BREAK BIT BIT
24.2H SET DURING AN INPUT INSTRUCTION BIT
24.3H RESERVED BIT
24.4H SET WHEN ARGUMENT STACK HAS A VALUE BIT
24.5H RETI INSTRUCTION EXECUTED BIT
24.6H RESERVED; TRAPS EXTERNAL INTERRUPT 0 BIT
24.7H SET BY USER TO SIGNIFY THAT A VALID
LIST@ OR PRINT@ DRIVER IST PRESENT
25H
BITS USED SPECIFICALLY AS FOLLOWS BIT
25.0H RESERVED, SOFTWARE TRAP TEST BIT
25.1H FIND TJE END OF PROGRAM, IF SET BIT
25.2H SET DURING A DIM STATEMENT BIT
25.3H INTERRUPT SATUS SAVE BIT BIT
25.4H RESERVED, INPUT TRAP BIT
25.5H SET TO SIGNIFY EXPANSION IS PRESENT BIT
25.6H SET WHEN CLOCK1 EXECUTED; ELSE
CLEARED BIT
25.7H SET WHEN BASIC IS IN THE COMMAND
MODE
26H
BITS USED SPECIFICALLY AS FOLLOWS BIT
26.0H SET TO DISABLE CONTROL-C BIT
26.1H SET TO ENABLE
„FAKE“ DMA BIT
26.2H RESERVED, OUTPUT TRAP BIT
26.3H SET TO EVOKE
„INTELLIGENT“ PROM PROGRAMMING BIT
26.4H SET TO PRINT TEXT STRING FROM ROM BIT
26.5H SET WHEN CONTROL-S ENCOUNTERED BIT
26.6H SET TO SUPPRESS ZEROS IN HEX MODE
PRINT BIT
26.7H SET TO EVOKE HEX MODE PRINT
27H
„BIT“ ADDRESSABLE BYTE COUNTER 28H -
3DH BIT AND BYTE FLOATING POINT
WORKING SPACE 3EH
INTERNAL STACK POINTER HOLDING REGISTER 3FH
LENGTH OF USER DEFINED STRING – $ 40H
TIMER 1 RELOAD LOCATION – HIGH BYTE 41H
TIMER 1 RELOAD LOCATION – LOW BYTE 42H
BASIC TEXT POINTER SAVE LOCATION – HIGH BYTE 43H
BASIC TEXT POINTER SAVE LOCATION – LOW BYTE 44H
RESERVED 45H
TRANCENDENTAL FUNCTION TEMP STORAGE 46H
TRANCENDENTAL FUNCTION TEMP STORAGE 47H
MILLI-SECOND COUNTER FOR REAL TIME CLOCK 48H
SECOND COUNTER FOR REAL TIME CLOCK – HIGH BYTE 49H
SECOND COUNTER FOR REAL TIME CLOCK – LOW BYTE 4AH
TIMER 0 RELOAD FOR REAL TIME CLOCK 4BH
USER ARGUMENT FOR ONTIME – HIGH BYTE 4CH
USER ARGUMENT FOR ONTIME – LOW BYTE
4DH - 0FFH 8052AH STACK SPACE AND USER
WORKING SPACE
Interner Speicher 