This japanese computer seems quite powerful. The main board is located into the main case, under the monitor.
Inside this main case there are 6 expansion slots which is quite enough ! Thus a lot of expansion boards were available (disk, printers, 8088, Z80 boards, etc).
An interesting feature is that there's a little trap-door on the keyboard which reveals some cool control switches : a power switch, a text mode switch (80 / 40 columns), a reset button and volume control knob. Quite useful !
Please consider donating your old computer / videogame system to Old-Computers.com or one of our partners from anywhere in the world (Europe, America, Asia, etc.).
A note on the PSU - in Australia, you needed to use a power converter to adapt to 240v which weighed a ton!
Another fun part was if you didn’t boot up in the right way your floppy drive would not be initialised meaning you needed to save your work to tape and then restart and read the file back off tape then save to disk!
Wednesday 24th August 2022
William (Australia)
I still have Dads old one floating around. Might have to dig it out se did it boots and reads the floppies.
Thursday 2nd June 2022
Knight (Australia )
Memory came in two sizes, 16k and 64k. Our School computer lab was full of these but only 2 had 64k in 1985/86 then replaced with IBM xt clones
Sunday 6th June 2021
Michael Schipp (Australia)
NAME
MB-6890 / Basic Master Level 3
MANUFACTURER
Hitachi
TYPE
Home Computer
ORIGIN
Japan
YEAR
1980
BUILT IN LANGUAGE
Hitachi Level-3 Basic Version 1.0 (Copyright Microsoft)
KEYBOARD
QWERTY full-stroke keyboard, separated numeric keypad, 5 function keys
CPU
Motorola 6809
SPEED
1 Mhz
RAM
48k ?
VRAM
16k
ROM
24k (Basic Interpreter)
TEXT MODES
80 x 28 / 40 x 25
GRAPHIC MODES
80 x 100 / 160 x 100 / 160 x 200 / 320 x 200 / 640 x 200
COLORS
8
SOUND
Unknown
I/O PORTS
6 expansion slots, RS232c, Tape-recorder
POWER SUPPLY
Built-in PSU
PERIPHERALS
Tape-recorder, printer interface board, light-pen, Chinese character ROM board, 8088 CPU board, Disk Interface board, Z80 CPU board, RAM expansion boards
