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YIS-503 IIR

Yamaha (Japan)

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Name YIS-503 IIR Yamaha 
Manufacturer Yamaha (Japan) Type Desktop
Production start (mm-yyyy) 9 - 1984 Production end (mm-yyyy) -
RAM 64Kb + 16Kb VRAM ROM 32Kb + ??Kb
CPU Z80A - 3,579 Mhz
Operating System MSX 1: MSX BASIC v 1.0
Text (Cols x Rows) 40x24, 32x24
Graphics 256x192@16 colors; 32 sprites
Sound 3 sound channels (8 octaves) and a channel of white noise
Storage memory 3,5" floppy disk drive (720Kb)
Serial port Parallel port
Others port Joystick x 2
Original price   Currency original price 0
Units sold
Note It seems that this computer was only sold in Russia... Note... The "R" letter in their name can be for Russia?? 
Configurations It has the Yamaha V9938 VDP, a S3257 MSX Engine and a Network Interface. The keyboard are a Russian layout. Also has some software in ROM. 
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