website/content/museum/matsushita-national-jr-300.md

title, categories, types, origins, years, cpus, params

title	categories	types	origins	years	cpus	params
MATSUSHITA National JR 300	Computers	Home Computer	Japan	1984	Zilog Z80A	name image company company_name specs tabs forum_thread links oc_id source National JR 300 /media/museum/photos/jr300.jpg /companies/matsushita MATSUSHITA label value NAME National JR 300 label value MANUFACTURER Matsushita label value TYPE Home Computer label value ORIGIN Japan label value YEAR 1984 label value BUILT IN LANGUAGE JR Basic 5.0 and Extended Basic label value KEYBOARD Full stroke keyboard, 98 keys, 6 function keys, separated numeric keypad label value CPU Zilog Z80A + MN1800A (6802 compatible) label value SPEED 4 Mhz (Z80A) label value CO-PROCESSOR MN1544 and MN1542 label value RAM 82 kb label value VRAM 52 kb label value ROM 40 kb (Basic : 16k) label value TEXT MODES 80 x 25 / 40 x 25 / 32 x 24 label value GRAPHIC MODES 640 x 200 / 320 x 200 / 640 x 400 label value COLORS 8 label value SOUND 3 channels, 8 octaves (Yamaha 8910) label value SIZE / WEIGHT Keyboard : 390 × 198 × 38 mm / 1.6kg\ Main unit : 390 × 350 × 80 mm / 4.8 Kg label value I/O PORTS RGB video output, Monitor, Audio out, Expansion, Tape (600/2400 bauds), Centronics, Joysticks, label value BUILT IN MEDIA None label value POWER SUPPLY AC100V 50/60Hz label value PERIPHERALS JR-F01 5''1/4 disk units, JR-F02 additional disk-drive, JR-F03 3''1/2 disk-drives, JR-F04 additional 3''1/2 diks-drive, JR-P01 Graphic printer, RQ-8300 & RQ-8200 tape-recorders label value PRICE 159000 yens links 327 title url text JR Japanese Museum http://dec.sakura.ne.jp/~hayashi/jr/index.html A lot of infos about the JR serie ! 321 url date https://web.archive.org/web/20230605131228/http://www.old-computers.com/museum/computer.asp?c=321 2023-06-05

The successor of the JR 200. Almost everything was changed, the computer has two CPUs to keep the compatibility with the previous models (JR-200). This machine has also a superimposition feature.

In fact it seems to be a mix between a JR-200 and a Sharp X1 system... quite strange ! But apparently this model was never really marketed.

A handheld model called JR 800 was launched few time later, but it was not compatible with the previous JR computers.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.