RISC OS Community

Spell 3 – Scry the Boundaries of a Dynamic Area

Purpose: read the size of a Dynamic Area

How it works:

Write a small BBC BASIC programs with the following instructions

10 da_id% = 0
20 SYS "OS_ReadDynamicArea", da_id% TO , start%, curr_size%, max_size%
30 PRINT "DA "; da_id%;" starts at ";~start%;" and is ";curr_size%;" bytes long, and has max size of: "; max_size%

What this program will display is the memory address of the Dynamic Area 0, it’s current size and the maximum size of the area.