Garbage Collection Features
BBS Operation - Garbage Collection Routine
Fast Garbage Collection Routine
Color 64 includes an enhanced machine language routine designed to speed up garbage collection. Garbage collection is the process by which BASIC reclaims memory occupied by string data that is no longer in use. On a standard Commodore 64 running BASIC alone, this process can introduce noticeable delays, sometimes long enough to interrupt the flow of a program.
The Color 64 fast garbage collection routine significantly reduces that delay. Instead of waiting while BASIC slowly reorganizes memory, the ML routine streamlines the cleanup process, resulting in faster overall system performance.
Several Color 64 BASIC routines rely heavily on this optimization, including:
- Regenerate Message Index
- Directory Regenerate
During these operations, you may notice the screen going blank. This is intentional. Disabling screen output allows the computer to complete memory operations more quickly. The temporary blank display is simply an indicator that the fast routine is actively working behind the scenes.
SYSOPs using a Commodore 128 gain an additional advantage. When running in 2 MHz mode, the garbage collection routine executes at double speed, further improving performance during intensive operations.
By default, the fast garbage collection routine is not always enabled. If you prefer to keep it active at all times for maximum system responsiveness, edit line 10241 of √bbs.init. Change: M7=. to: M7=1
With the routine permanently enabled, you will observe more frequent screen blanking during memory-intensive tasks. This behavior is normal and confirms that the accelerated garbage collection is in use.
For additional technical details, refer to the descriptions of the !48 and !53 variables in ML Variables.
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