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Spectravideo SV-318
The
classic! Spectravideo's first real computer. The red
joystick made it stand out from the crowd. Launched at Winter
CES 1983 in Las Vegas.
|
NAME |
SV-318 |
|
MANUFACTURER |
Spectravideo |
|
TYPE |
Home Computer |
|
ORIGIN |
U.S.A. |
|
YEAR |
1983 January |
|
BUILT IN LANGUAGE |
Microsoft Extended
BASIC |
|
KEYBOARD |
Rubber keyboard
with built in joystick |
|
CPU |
Zilog Z80 A |
|
SPEED |
3.6 MHz |
|
RAM |
16 kB (up to 144
kB) |
|
VRAM |
16 kB |
|
ROM |
32 kB |
|
GRAPHICS |
TMS9918A
SCREEN 0: Text mode 40x24 characters, two
colors (background+foregrund).
Fonts are formed using a 6x8 pixel matrix. Sprites are not available in this mode.
SCREEN 1: High resolution graphics mode: 256x192, 16 colors.
Sprites are available.
Colour resolution is
8x1 pixels: that is, for every group of 8x1 pixels, only one
foreground/background color pair may be displayed.
This is a
standard TMS-9918A limitation.
Text is also supported in SCREEN1, allowing up to 43x24
characters (with two pixels chopped off the 43rd character).
SCREEN 2: Low resolution graphics mode: 64x48, 16 colors.
Sprites are available.
The screen is addressed and formed using full 256x192
resolution, with 4x4 block graphics (each 8x8 pixel matrix holds
four low resolution pixels). Sprites are displayed at high
resolution (256x192).
Text is also supported in SCREEN2, allowing up to 11x6
characters (with two pixels chopped off the 11th character) |
|
TEXT MODES |
40 chars x 24 lines
(optional 80 x 24) |
|
GRAPHIC MODES |
256 x 192 dots |
|
COLORS |
16 |
|
SOUND CHIP |
AY-3-8910 |
|
SOUND |
Three channels, 8
octaves |
|
I/O PORTS |
Audio/Video, Tape,
Joystick (2), Cartridge, Super Expander |
|
BUILT IN MEDIA |
None |
|
POWER SUPPLY |
External power
supply. 9V AC & 16V AC out |
|
PERIPHERALS |
SVI-903 Data
Cassette Recorder, SV-601 Super Expander, SV-602 Single Slot
Expander, SV-902 Floppy Disk drive (external), SV-901 Dot Matrix
Printer, SV-805 RS-232 Interface, SV-105 Graphic Touch Tablet,
SV-803 16K RAM Pack, SV-807 64K RAM Pack, SV-802 Centronics
Interface, SV-701 Smart Modem, SV-801 Dual Disk Drive
Controller, SV-806 80-Column Display adapter, SV-603 Coleco Game
Adapter, SV-101 Quickshot Joystick |
|
PRICE |
$299 |
|
SV-318 boot screen
Marketing chart from
Spectravideo, comparing the SV-318 with Commodore 64, Apple IIe, Atari
800 and others.
SV-318 with Super Expander and floppy drive.
SV-318 with SV-903 Cassette Deck
Game cartridge inserted (Super Cross Force)
Rear view of SV-318
Inside the SV-318
SV-318 Mainboard
Z80 CPU and a piggyback ROM board. Obviously work in
progress. UVPROM's used to store the software.
Complete SV-318 system in original
box.
The SV-318 was replaced by the SV-318MKII.
This had very limited distribution.
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