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Boot keys

Some special functions of the Mega-Cart can be accessed by holding down various keys while booting the Vic-20:

Key

Information
Enter the Service Menu
Restart the last selected item
Select a menu tune
Start the Vic Unexpanded (with 32K Read-Only, No auto start)
Start the Vic +3K Ram (with 32K Read-Only, No auto start)
Start the Vic +32K Ram (No auto start)
Start the Vic-20 fully Expanded with EASYLOAD+ in RAM on BLK 5
Start the Vic Unexpanded with SJLOAD active on BLK5 *
Start the Vic +3K Ram with SJLOAD active on BLK5 *
Start the Vic +32K Ram with SJLOAD active on BLK0 (3K RAM area) *
Start the FILE BROWSER to launch any program from classic or sd2iec based drives *
Lock the Cartridge games menu [1]
Lock the Tape/Disk games menu [1]
Lock the Utilities menu [1]
Lock the Normal Reset menu [1]
Lock Soft Reset menu [1]
Lock the Last Selection [2]
Unlock previous selection (keys 1-6) and enter the Early Startup menu


In the Download section you can find a handy Vic-20 keyboard overlay by Brent Santin that shows all boot keys.
 

[1] When you "lock" a certain menu, you limit the Mega-Cart to displaying only the "locked" menu on subsequent boots.  You can re-enable the Early Startup Menu by holding down the “0” (zero) key while booting.

[2] When you "lock" the Last selection, you limit the Mega-Cart to always starting the last item selected on subsequent boots (be it a game, utility or Memory configuration). You can re-enable the Early Startup Menu by holding down the “0” (zero) key while booting.

[*] from revision 20 (November 2010).