SV-318

Infobox computer
Photo =
Type = Home computer
Released = 1983 (Winter CES, Las Vegas)
Discontinued =
Processor = Zilog Z80A @ 3.6 MHz
Memory = 16 KB (+16 KB video memory)
OS = Microsoft Extended BASIC

The SV-318 was the basic model of the Spectravideo range. It was fitted with a chiclet style keyboard, difficult to use, alongside which sat a combination cursor pad/joystick. This was a curious disc-shaped affair with a hole in the centre; put a red plastic 'stick' in the hole and you had a built-in joystick, remove the stick and it was a directional arrow pad for word processing etc. This machine also had only 16kb of user RAM (plus an additional 16kb of video RAM), which limited its usefulness, though this could be expanded via an external peripheral box.

This machine was basically identical to its big brother the SV-328, the only differences being in the keyboard and amount of memory. The ROM, expandability, mainboard and case of the two machines were identical.

ystem specs

* Processor: Zilog Z80A running at 3.58 MHz
* ROM: 32 KB
** BIOS (16 KB)
** BASIC (16 KB)
* RAM: 16 KB
* Video Display Processor: Texas Instruments TMS9918
** VRAM: 16 KB
** Text modes: 40×24 and 32×24
** Resolution: 256×192 (16 colours)
** Sprites: 32, 1 colour, max 4 per horizontal line
* Sound chip: General Instrument AY-3-8910 (PSG)
* Programmable Peripheral Interface : Intel 8255

External links

* [http://www.samdal.com/sv318.htm SV-318 at Roger's Spectravideo page]
* [http://museo8bits.com/ficha.php?nombre=svi328 El Museo de los 8 Bits]