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The Gradiente Expert 1 is a
Brazilian MSX 1 computer. It is composed of two parts:
the main unit and the keyboard. Gradiente is a Brazilian
consumer electronic products company. It is not
suprising as the unit's design looks like a HI-FI
system... Along with the
HotBit, the Experts were the only MSX systems
available in Brazil.
The Expert XP-800 was in fact a clone of the
National CF-3000. It is a quite complete
MSX 1 computer with two cartridge slots placed on
the front panel and a numeric keypad. The rear of the
system is quite populated with a lot of connectors : BUS
Expansion port, Keyboard connector, Tape interface
(1200/2400 bauds), RGB video output, Composite video
output (monochrome), Parallel port, Audio output, 2 x
power out connector (Max 100W)... On later models (v1.1)
a few connectors were added: 6v output for DataCorder,
RCA Color Video Composite (PAL-M) and RF-Out with
channel selector (PAL-M). A speaker level control and an
AC Switch (120V-240V) can also be found.
Sadly, the cassette interface, RGB connector, keyboard
connector, expansion connector and printer connector
were not compatible with the MSX standard. Gradiente did
this on purpose, trying to set their own proprietary
standard in Brazil... Also, a little difference in the
ASCII table between the Expert (corrected with the
Expert GPC-1) and the Hotbit caused a lot of problems in
Brazil...
The Expert XP-800 was later followed by the Expert GPC-1
(1986), the
Expert Plus (1989) and finally the Expert DD Plus
(1989). |
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NAME |
Expert XP-800 |
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MANUFACTURER |
Gradiente |
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TYPE |
Home Computer |
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ORIGIN |
Brazil |
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YEAR |
December 1985 |
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BUILT IN LANGUAGE |
Microsoft Extended Basic (MSX Basic V1.0) |
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KEYBOARD |
Full-stroke keyboard with numeric keypad, 5
function keys and 4 arrow keys. 89 keys. |
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CPU |
Zilog Z80A |
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SPEED |
3.58 MHz |
|
COPROCESSOR |
TMS-9128NL video processor |
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RAM |
64 KB |
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VRAM |
16 KB |
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ROM |
32 KB BASIC/BIOS ( MSX BASIC V1.0) |
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TEXT MODES |
Mode 0 : 40 x 24
Mode 1 : 32 x 24 |
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GRAPHIC MODES |
Mode 2 : 256 x 192 with 16 colors (Hires mode)
Mode 3 : 64 x 48 with 16 colors (Multi colour
mode)
32 sprites |
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COLORS |
16 |
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SOUND |
General Instruments AY-3-8910 Programmable Sound
Generator
3 channels, 8 octaves |
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SIZE / WEIGHT |
420 x 110 x 280 mm / 4,7 Kg
Keyboard : 420 x 47 x 170mm / 1 Kg |
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I/O PORTS |
BUS Expansion port, Keyboard connector, 2
controller ports, 2 cardridge slots, Tape
interface (1200/2400 bauds), RGB video output,
Composite video output (PAL-M), Parallel port,
Audio output, Two power out connector (Max 100W) |
|
OS |
MSX DOS |
|
POWER SUPPLY |
Built-in PSU - AC 120/220V 50/60 Hz |
|
PRICE |
Unknown |
Reference: www.old-computers.com |
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