![]() |
Routines |
Prev: 07169 | Up: Map |
The address of this routine is derived from an offset found in the command class table.
The commands of class 3 may, or may not, be followed by a number. e.g. RUN and RUN 200.
|
|||||||||||
CLASS_03 | 07181 | CALL FETCH_NUM | A number is fetched but zero is used in cases of default. | ||||||||
The address of this entry point is derived from an offset found in the command class table.
The commands of class 0 must not have any operands, e.g. COPY and CONTINUE.
|
|||||||||||
CLASS_00 | 07184 | CP A | Set the zero flag for later. | ||||||||
The address of this entry point is derived from an offset found in the command class table.
The commands of class 5 may be followed by a set of items, e.g. PRINT and PRINT "222".
|
|||||||||||
CLASS_05 | 07185 | POP BC | In all cases drop the address - SCAN_LOOP. | ||||||||
07186 | CALL Z,CHECK_END | If handling commands of classes 0 and 3 and syntax is being checked move on now to consider the next statement. | |||||||||
07189 | EX DE,HL | Save the line pointer in the DE register pair. | |||||||||
After the command class entries and the separator entries in the parameter table have been considered the jump to the appropriate command routine is made.
|
|||||||||||
07190 | LD HL,(23668) | Fetch the pointer to the entries in the parameter table from T-ADDR and fetch the address of the required command routine. | |||||||||
07193 | LD C,(HL) | ||||||||||
07194 | INC HL | ||||||||||
07195 | LD B,(HL) | ||||||||||
07196 | EX DE,HL | Exchange the pointers back and make an indirect jump to the command routine. | |||||||||
07197 | PUSH BC | ||||||||||
07198 | RET |
Prev: 07169 | Up: Map |