At the boot time computer loads BIOS and MSXBDOS (BIOS for Disc BIOS) from a bood disc. After that COMMAND.COM (MSXDOS). Computer can bott from RAM disc as well. Computer go to AMSTRAD mode when "Shift" is pressed while reset.
== Hardware Expansions == Most pins on the expansion port are the same as on CPC, so most CPC expansions should work on the Aleste (with a 62pin to 50pin adaptor). Additional Aleste specific expansions are: === Magic Sound Expansion Board ===
* [[Magic Sound Board]]
Additional sound board MagicSound is a four channel DMA playback. Supports 8 bit per sample, 6 bits of volume per channel, and 16bit samplerate timer per channel. Computer uses the board for playing STM (Scream Tracker) files.
=== Foton Expansion Board ===
Another additional board FOTON is a "Light Processor". The board have D54 interface and Aleste with special FX application controls over club's light.
=== Turbo Mode Upgrade ===
Runs the CPU at faster speed. Intended for programs that require a lot of CPU load, like compilers, or ported MSX games (which need to draw the MSX video display processors (VDP) hardware sprites by software).