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Spectravideo
SVI-328 MKII
A revised version of the SV-328,
launched in 1984. Almost identical on the outside, but with a
brand new motherboard inside.
|
NAME |
SVI-328 MKII |
|
MANUFACTURER |
Spectravideo |
|
TYPE |
Home Computer |
|
ORIGIN |
U.S.A. |
|
YEAR |
1984/1985 |
|
BUILT IN LANGUAGE |
Microsoft Extended
BASIC interpreter |
|
KEYBOARD |
Full stroke
keyboard with numeric keypad |
|
CPU |
Zilog Z80 A |
|
SPEED |
3.6 MHz |
|
RAM |
64 kB (up to 256
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-904 Data
Cassette Recorder, SVI-605/605B Super Expander, SVI-602 Single Slot
Expander, SVI-902 Floppy Disk drive (external), SVI-901 Dot Matrix
Printer, SVI-805 RS-232 Interface, SVI-105 Graphic Touch Tablet,
SVI-803 16K RAM Pack, SVI-807 64K RAM Pack, SVI-802 Centronics
Interface, SVI-701 Smart Modem, SVI-801 Dual Disk Drive
Controller, SVI-806 80-Column Display adapter, SVI-603 Coleco Game
Adapter, SV-101 Quickshot Joystick |
|
PRICE |
3600NOK (from
Norwegian importer Computer Standard pricelist, dated May 15th
1985) |
SVI-328MKII System Peripheral Map
SVI-328MKII Users Manual
Original SV-328 (top) vs SV-328MKII (bottom)
Inside the SV-328MKII. A much more streamlinded
design compared to the original SV-328.
Most of the TTL chips is replaced by a ULA chip.
No shielding as found in the original SV-318 and
SV-328.
SV-328MKII Mainboard
Early marketing material from Spectravideo lists features as word processing and super terminal software
built into system ROM. This was probably planned, but never
happened.
There's reserved space for a extra ROM chip (ROM 01) at the PCB above. That's
probably where the missing software
was supposed to go.
The SVI-328 with fully loaded Superexpander
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