83Plus:BCALLs:4E70

Synopsis

Official Name: CreateVar

BCALL Address: 4E70

Creates a variable of a specified type.

Inputs

• A: type of variable to create (05h for programs, 06h for protected programs, etc.)
• HL: length in bytes
• OP1+1 = name of variable

Outputs

• HL points to symbol table entry
• DE points to data section
• OP4 contains the name as inputted in OP1

Registers Destroyed

• AF,BC,OP1,OP2

Comments

If the length of name is shorter than 8 characters it must be zero-terminated. If there isn't enough RAM a memory error will be generated. Contents of the program are random.

Example

Create an unprotected program of size 10:

ld hl,progName-1
RST rMov9ToOP1
ld hl,10
ld a,05h
B_CALL CreateVar

progName: db "PROGNAME"