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[[Image:Aleste.jpg|thumb|right|Aleste 520EX - a CPC clone housed in a case with MSX keyboard]]
The '''Aleste 520EX''' is a [[Clones|clone]] of the Amstrad CPC 6128 developed 1993 Patisonic in Russia in the early 90ies Omsk (Siberia).
==Amstrad Mode==
Differences:
- The Aleste uses a patched CPC6128 Operating System ROM. It is patched to use the Aleste's 8-bit printer port and has a different startup message.
==MSX Special Mode==
At this mode computer have different memory manager. The manager seems same like MSX mapper and could swicth ON any 16KB page of whole memroy at the any of 16KB page of CPU memory.
The computer have also mc146818 compatible RTC and a 8251 compatible serial. A serial mouse can be used.
The 8253 timer is used to generate transmit and receive clock for serial. In addition the cursor CURSOR output of the CRT CRTC is connected as a trigger which is then connected to the colour hardware. So the CRTC cursor can be used to switch colours by the hardware.
Aleste ROM is 64KB, additional page have BIOS SETUP and MSXDOS Boot Loader.
The BIOS SETUP lets control over: date and time, boot drive, RAM disk, screen mode and style, printer, serial port, and mouse.
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.
== Magic Sound Expansion Board ==
* [[Magic Sound Board]]
Additional sound board MagicSound is a four channels smapler. Each channel has DMA playback. Supports 8 bit per sample and , 6 bits of volume per channel, and 16bit samplerate timer per channel. Computer uses the board for playing STM (Scream Tracker) files. The sample's data containg at the Aleste's memory, that is possible because Aleste have support DMA access from external board to whole Aleste's memory.
== VDP Emulator (is this an expansion board?) ==