Contents |
Description
The YIS-503 is same as the CX5F but sold without any module. The color is different.
It was aimed at the Japanese market and features a Japanese keyboard. The power supply is internal.
System sets
It was also offered in packages with other Yamaha hardware:
- YIS-503G Graphic System, for ¥85,700 consisting of:
- YIS-503
- ZGA-01 Graphics Card Set, consisting of:
- CR-01 Card Reader
- UGA-02 Graphic Card Program
- VC-01 video cable
- YIS-503M Music System, for ¥115,500, consisting of:
- YIS-503W Word Processing System, for ¥210,500, consisting of:
Localised editions
The YIS-503 has been adapted for the French and Belgian markets - see Yamaha YIS-503F - and for the Arabic countries - see Sakhr AX-100.
| Brand | Yamaha |
| Model | YIS-503 |
| Year | 1984 |
| Region | Japan |
| Launch price | ¥64,800 |
| RAM | 32kB in slot 0 |
| VRAM | 16kB |
| Media | MSX cartridges, side slot modules |
| Video | Texas Instruments TMS9928A |
| Audio | PSG (YM2149), (Music System package) SFG, MIDI |
| Chipset | Yamaha YM5214 |
| Keyboard layout | QWERTY/JP50on |
| Extras | 60 pin module port, Graphic System, Music System and Word Processing System packages |
| Emulation | ROM dumped and machine emulated. The rear expansion slot and side module slot are handled like regular MSX cartridge slots. |
Pictures
Specifications
The YIS-503 is a MSX1 with a Z80A from Sharp (LH-0080A). It supports all Yamaha modules ("units").
To use the expansion bus as a second cartridge slot, you need the Yamaha Single Cartridge Adapter CA-01.
To get 64kB RAM with the YIS-503, you can insert the URM-01 cartridge in slot 1 or 2 or the SRE-01 module in side slot 3. It means that the 64kB RAM is split between two slots, a configuration that can cause poorly written software to crash. Also, with this layout, the POKE-1,(15-PEEK(-1)\16)*17 trick to workaround buggy software that does not handle subslots properly will not work. As such it is recommended to use a 64kB expansion, or a MSX1 compatible MemoryMapper that can self-initialise.
Slot Map
| Slot 0 | Slot 1 | Slot 2 | Slot 3 | ||||
|---|---|---|---|---|---|---|---|
| Page C000h~FFFFh | RAM | Cartridge Slot | Expansion Bus | Module Slot | |||
| Page 8000h~BFFFh | |||||||
| Page 4000h~7FFFh | Main-ROM | ||||||
| Page 0000h~3FFFh |
Connections
- DIN 41524 Monitor output
- Data Recorder connector
- Centronics compatible Parallel port for a printer
- 2 general connectors (Joysticks, Mouse, Paddle controllers, etc)
- 1 cartridge slot
- 1 module slot (left side, 60 pin connector)
- 1 expansion bus slot (back side, 2nd cartridge slot via CA-01 adapter)
Links
- http://www.cx5m.net/ (Now the site is broken only some files still online), Archived version (2019 version, some files are missing), Another mirror (file-hunter.com)
- Yamaha YIS-503/303 flyer (Japanese)
- Review (Japanese)
- Blog post about the YIS-303 and 503 (Korean)