website/content/museum/digital-equipment-corporation-decmate-ii.md

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

title	categories	types	origins	years	cpus	params
Digital Equipment Corporation DECMATE II	Computers	Professional Computer	U.S.A.	1982	12 bit Harris 6120	name image company company_name specs tabs forum_thread photos adverts oc_id source DECMATE II /media/museum/photos/digital_decmate2_system_1.jpg /companies/digital-equipment-corporation Digital Equipment Corporation label value NAME DECMATE II label value MANUFACTURER Digital Equipment Corporation label value TYPE Professional Computer label value ORIGIN U.S.A. label value YEAR 1982 label value END OF PRODUCTION 1986 label value BUILT IN LANGUAGE None label value KEYBOARD Full-stroke 106 keys with 20 function keys, editing and numeric keypads label value CPU 12 bit Harris 6120 label value SPEED 4 or 8 MHz label value RAM 32 K x 12bits label value ROM 4 KB label value TEXT MODES 80 chars x 24 lines / 132 chars x 24 lines label value GRAPHIC MODES optional label value COLORS monochrome label value SOUND beeper label value I/O PORTS Monitor, Serial, Printer label value BUILT IN MEDIA 1 or 2 x RX50 dual 5.25'' floppy disc drives\ Optional 5, 10 or 20 MB hard disk label value OS COS 310 label value POWER SUPPLY Built-in switching power supply unit label value PERIPHERALS Z80 card, Graphic colour card, 8088 card, MFM H.D. controller card label value PRICE $1435 photos adverts 826 title subtitle text image TOWER STAND #1 The Decmate II is here inserted into the optional tower stand. /media/museum/photos/digital_decmate2_standfront_1.jpg title subtitle text image TOWER STAND #2 Tower stand Back side /media/museum/photos/digital_decmate2_standback_1.jpg title subtitle text image IN USE Word processor software in use. Notice that the keyboard supplied with the DECmate was in fact exactly the same as the one used with the DEC VT200 and VT300 series terminals. /media/museum/photos/digital_decmate2_inuse_1.jpg title subtitle text image RX50 FD UNIT Dual 5.25" floppy disc unit /media/museum/photos/digital_decmate2_front_1.jpg title subtitle text image INSIDE RX50 This very particular floppy drive unit uses common motors and electronic board for managing both drives /media/museum/photos/digital_decmate2_dualfdunit_1.jpg title subtitle text image BACK SIDE **(1)** Brightness and contrast adjustments\ **(2)** Keyboard RJ11 jack\ **(3)** Colour graphic video connector. Only available when the optional graphic board is installed\ **(4)** Monochrome video connections\ **(5)** Printer connector\ **(6)** Serial connector. /media/museum/photos/digital_decmate2_back_1.jpg title subtitle text image INSIDE #1 Like most of DEC desktop systems, hardware design is well thought out and modular. Motherboard can be taken off like a drawer, as well as mass storage units. Power supply unit also can be taken apart in less than 5 seconds /media/museum/photos/digital_decmate2_inside_1.jpg title subtitle text image INSIDE #2 Full system including a 5.25" full size 5 MB Seagate ST-506 hard disk. Seagate 10 MB (ST-412) or 20 MB (ST-225) could be installed too. /media/museum/photos/digital_decmate2_inside_2.jpg title subtitle text image MAIN BOARD **(1)** Expansion connectors for optional boards\ **(2)** Floppy drive connectors /media/museum/photos/digital_decmate2_mainboard_1.jpg title subtitle text image OPTION CARDS **(1)** Z80 card along with 64 KB of CP/M RAM\ **(2)** Winchester hard disk controller card\ **(3)** Colour graphic card. /media/museum/photos/digital_decmate2_mainboard_2.jpg title subtitle text image DECMATE MANUALS Digital Hardware and software manuals are very clear and detailled. /media/museum/photos/digital_decmate2_manuals_1.jpg title subtitle text image US ADVERT (1982) This advert introduced three new Digital professional computers: the **Professional 300 Series**, the **DECmate II**, and the **Rainbow 100** Advert said: All that personal computers needed were a few professional standards. Until now, manufacturer have made personal computers that were a hopeful compromise between home and use business. But now, Digital Equipment Corporation offers the first personal computers designed and built strictly for professional use. And since different professionals have different needs, Digital is introducing not one, but three personal computers made to professional standards. /media/museum/pubs/digital_decmate2_pub_1.jpg 845 url date https://web.archive.org/web/20230601212724/http://www.old-computers.com/museum/computer.asp?c=845 2023-06-01

The DECMATE II shared the same case, power supply unit and RX50 dual floppy drive as the Rainbow 100 and was sold as a desktop or tower stand system. Like DECMATE I and III, it was a member of the PDP-8 family based on the Harris 12-bit 6120, a single chip PDP-8 compatible microprocessor.

It had 32 Kwords of RAM for use by programs, and a further 32 Kwords containing code which was used for device emulation.

The same year, DEC launched the Rainbow 100, a Z80/8088 based system to compete with CP/M and MS-DOS machines, as well as the 300 Professional systems.

The DECMATE II was the Decmate series most versatile system. Customer could choose between either one or two dual 5.25" floppy disc drives, or a 5, 10 or 20 MB hard disc, or even 8" floppy drives. Several option boards were also available. Among them, a Z80 card for CP/M compatibility and a graphic board allowing a color monitor to be used.

Digital corporation provided a large range of professional software. However, the Decmate II was mainly used for professional word processing, connected to a serial letter quality printer.

Special thanks to David Cheeseman