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MicroBee
MicroBee (Micro Bee) was a series of home computers by Applied Technology, later known as MicroBee Systems.
The original MicroBee computer was designed in Australia by a team including Owen Hill〔(Secret of project Granny Smith ) By Gordon Laing, July 12, 2005 - theage.com.au〕 and Matthew Starr. It was based on features available on the DG-Z80 and DG-640 S-100 cards developed by David Griffiths, TCT-PCG S-100 card developed by TCT Micro Design and MW6545 S-100 card developed by Dr John Wilmshurst. It was originally packaged as a two board unit, with the lower "main board" containing the keyboard, Zilog Z80 microprocessor, Synertek 6545 CRT controller, of "screen" RAM, of character ROM (128 characters) and of Programmable Character Graphics (PCG) RAM (128 characters). Each byte in the screen RAM addressed a character in either the character ROM or PCG RAM. A second board, termed the "core board", contained the memory, and on later models also included a floppy disk controller.
==Kit beginnings==
The computer was conceived as a kit, with assembly instructions included in Your Computer magazine, in February 1982.〔(Microbee computer ), From:Owen Hill Date:24 Aug 1998, Link list on Australian network policy and communications〕 After a successful bid for the New South Wales Department of Education computer tender, the computer was repackaged in a two-tone beige and black case, and sold pre-built. The ROM held the MicroWorld BASIC interpreter written by Matthew Starr and DGOS (''David Griffiths Operating System'') compatible System Monitor. In addition to the there is additional ROM socket for optional programs such as WORDBEE (Word processor) or EDASM (a Z80 Editor/Assembler that was written by Ron Harris).〔(Graphic Word bee user's manual ) by Ron Harris and Gordon Rowell, Honeysoft, c1985., National Library of Australia〕
Original MicroBees ran at a clock speed of , with a video dot clock of , which was sufficient to display () on a modified television or composite monitor. The original machines were supplied with of static RAM, and stored programs on cassette, using 300 or 1200 Baud encoding.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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