Aleste 520EX
Aleste 520EX



Setname:  al520ex   
Year: 1993
Manufacturer: Patisonic
Status: imperfect  badworks
Type: Home Computer
Parent: Amstrad CPC464
Emulation info
Overall emulation:  good   
Color emulation:  good  
Sound emulation:  imperfect  
Graphics emulation:  good  
Savestates:  unsupported   

Tech info
 Base hardware: (available in all slot configurations)
Z80 ("maincpu")cpu 4000000 Hz
Speaker ("mono")audio
Wave ("wave")audio
AY-3-8912A ("ay")audio 1000000 Hz
Screen ("screen")raster horizontal 704 x 144 @ 50.080128
Media devices
snapshot ("snapshot") snapshot dump sna
cassette ("cassette") cassette cass wav, cdt
RAM options
2M 2097152
Software lists

 Optional hardware: (available with specific slot configurations)

 Configure the slot options for al520ex:
 Slot Value

Show detailed info about 'Configurations' of this system

Manufacturer Name Isp
TV Refresh Rate 60 Hz
 50 Hz
Monitor CTM640 Colour Monitor
 GT64 Green Monitor
Joystick port device 2-button Joystick
 AMX mouse interface

Show detailed info about 'Slot Options' of this system
Slot options

NameValueCompatible device(s)
centronics ap2000ap2000
 printer centronics_printer
exp amdrumcpc_amdrum
upd765:0 525hd floppy_525_hd
upd765:1 525hd floppy_525_hd

Romset info
ROM NameSizeCRC32SHA1Dump StateBIOS option
al512.bin65536 e8c2a9a1ad5827582cb19eaaae1b76e67df62d96da6ad96bgood
af.bin32 c81fb52417738d0603915a67ec1fddc4cbf7d6b98cdeb8f6good
mapper.bin256 0daebd808633073cba752c38c5dc912ff9f6a3c89357539bgood
rfcoldat.bin2048 c6ace0e62f4c51fcfaacb8deed68f6ae9388b870bc962cefgood
rfvdkey.bin2048 cf2aa4b020f37da3bc3c377b1c47ae4d9ab8d150faae19a0good
romram.bin256 b3ea95d71252390737a7ead4ecec988c873181798fbc291bgood


* CPU: Zilog Z80A @ 3.5/4/7/8MHz
* RAM: 512kB, expandable to 2MB
* Audio: AY-3-8912
* Video: 6845 CRTC
* Video modes: 160x200x16, 320x200x4, 640x200x2, 320x200x16, 640x200x4, 256x212x16, 512x212x4
* Palette: 64 colours (6-bit RGB)
* RTC: MC146818


MESS currently supports al520ex emulation with one "cassette" (cass) device and up to two floppy drives, "floppydisk1" (flop1) and "floppydisk2" (flop2). The former one supports tapes in .wav and .cdt format; the latter ones support disk images in .dsk format (the MSX .dsk format).

Also notice that a "snapshot" (dump) feature is available for .sna files and that the "printer" (prin) is emulated as well.


To start in CPC mode, hold SHIFT while booting.

To enter system setup, hold CLR (mapped to Backspace, by default) while booting.

Insert a bootable Aleste MSX disk image to boot to MSX-DOS. Run an executable (*.com) program by typing the filename (without the .com extension) at the A> prompt and pressing ENTER.


This system requires full keyboard emulation to work correctly. At startup, full keyboard emulation mode is enabled by default. Whilst in full keyboard emulation mode, some key associated functionality may be disabled (like the ESC key for EXIT). The keyboard emulation mode is toggled using the "Scroll Lock" key (by default).

Known Issues

* Supports only MSX format disk images currently.
* RTC emulation is not complete, time is not always constantly updated on screen in system setup.
* The Magic Sound expansion is not emulated.

History and Trivia

The Aleste 520EX is a Russian clone of the CPC6128, that expands existing video mode and can run MSX-DOS.

It also adds an MC146818 RTC/NVRAM, an Intel 8253 timer and the "Magic Sound" board, which is a 4-channel DMA-based sample player.

Finally, it includes a software emulation of the MSX2 VDP, used in the ports of MSX games.

(info from MESS driver)


* Aleste 520 (Some pages are in Russian) --
* CPC Wiki link --

Edit the History info for this game.


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