The Panasonic computers from the JD Series are classic CP/M professional systems released at the begining of the 80's.
They are powered by an Intel 8085A processor, offer from 32 KB to 64 KB RAM and are equiped with two 8" or 5.25" floppy disk drives, depending on models. No graphic features here, but 80x24 text resolution on a 12" built-in green phosphor monitor.
The following software were delivered on disk: CP/M 2.2, Microsoft Basic, MicroCobol and Assembler.
Panasonic released several computers in this serie: JD-800U, JD-840U, JD-700U, JD-740U, JD-850M, JD-800M and JD-740M. There were almost the same systems with RAM and/or floppy fisk drive specs differences. See the comparison charts for more details.
The following software were delivered on disk: CP/M 2.2, Microsoft Basic, MicroCobol and Assembler. Panasonic released several computers in this serie: JD-800U, JD-840U, JD-700U, JD-740U, JD-850M, JD-800M and JD-740M. There were almost the same systems with RAM and/or floppy fisk drive specs differences. See the comparison charts for more details.
主要参数编辑本段回目录
 |  |
| NAME | JD series |
| MANUFACTURER | Panasonic |
| TYPE | Professional Computer |
| ORIGIN | Japan |
| YEAR | ? 1981 |
| BUILT IN LANGUAGE | CP/M, Microsoft Basic, MicroCobol and Assembler delivered on disks |
| KEYBOARD | full stroke keyboard, 94 keys, 21 function keys, numeric keypad and arrow keys |
| CPU | Intel 8085A |
| SPEED | 2 MHz |
| RAM | JD-700U: 32 KB (56 KB max.) JD-800U, 840U, 740U : 56 KB JD-800M, 740M : 60 KB JD-850M: 64 KB |
| ROM | 2 KB (+ 2KB optional) |
| TEXT MODES | 80 x 24 |
| GRAPHIC MODES | None |
| COLORS | None, built-in 12'' green phosphor monitor |
| SOUND | buzzer |
| SIZE / WEIGHT | 540 x 390 x 630 mm / 50 Kg |
| I/O PORTS | 3 x RS232c connectors |
| BUILT IN MEDIA | two 8'' or 5.25'' floppy disc drives, depending on models |
| OS | CP/M 2.2 |
| POWER SUPPLY | PSU built-in |
| PERIPHERALS | 8.4 MB hard disk, GP-IB (IEEE-488) interface, cartridge tape |
| PRICE | Unknown |
参考文献编辑本段回目录
http://www.old-computers.com/museum/computer.asp?st=1&c=1272
http://www.old-computers.com/museum/photos.asp?t=2&c=1272&st=1
http://www.old-computers.com/museum/photos.asp?t=2&c=1272&st=1
