yann64andClaude Opus 5.5
b274874139
1,289 discussions, 9,527 archived comments; pages no longer carry the comments themselves. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ
78 lines
2.9 KiB
Markdown
78 lines
2.9 KiB
Markdown
---
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title: BRASCOM BR-1000M
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categories:
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- Computers
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types:
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- Professional Computer
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origins:
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- Brazil
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years:
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- '1982'
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cpus:
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- Zilog Z80A
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params:
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name: BR-1000M
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image: /media/museum/photos/brascom_br1000.jpg
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company: /companies/brascom
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company_name: BRASCOM
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specs:
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- label: NAME
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value: BR-1000M
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- label: MANUFACTURER
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value: Brascom
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- label: TYPE
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value: Professional Computer
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- label: ORIGIN
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value: Brazil
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- label: YEAR
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value: '1982'
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- label: KEYBOARD
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value: Full stroke QWERTY keyboard with numeric keypad, 69 keys
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- label: CPU
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value: Zilog Z80A (4 MHz) or Z80B (6 MHz)
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- label: SPEED
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value: 4-6 Mhz
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- label: RAM
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value: 64 KB + 64 KB for each dumb terminal (up to 6)
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- label: ROM
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value: 6 Kb
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- label: TEXT MODES
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value: 25 lines x 80 char.
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- label: GRAPHIC MODES
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value: Yes, in last models
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- label: COLORS
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value: Monochrome monitor
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- label: SOUND
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value: Beeper
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- label: I/O PORTS
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value: S100 bus
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- label: BUILT IN MEDIA
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value: up to four 5.25'' or 8'' floppy disks, and optional 5 or 10 Mb Winchester hard-disks
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- label: OS
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value: CP/M, BR1000 (Same as Cromemco Unix OS)
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- label: POWER SUPPLY
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value: Built-in CPU
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- label: PERIPHERALS
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value: S100 cards
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forum_thread: 527
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oc_id: 533
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source:
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url: https://web.archive.org/web/20230608084711/http://www.old-computers.com/museum/computer.asp?c=533
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date: '2023-06-08'
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---
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The BR1000Ms were Brazilian professional computers.
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The BR1000M's hardware was the same as [Cromemco's](/museum/cromemco-system-i-ii-iii/), and the so-called BR1000 operating system was in fact Cromix, a UNIX flavor designed to run on Cromemco's hardware.
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Two models of the BR1000M were available: one with a Z80A processor at 4 MHz, capable of handling up to 4 dumb terminals, one of which was also used as the system console; and a "high end" model with a Z80B processor at 6 MHz, capable of handling up to 2 more terminals.
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RAM size was one 64-KB system RAM board plus one additional 64-KB board for each terminal, all plugged into S100 slots. The first machines used 8-inch floppy drives, later upgraded to 5-1/4-inch units and, eventually, to 5- or 10-MB Winchester hard disks, keeping a floppy drive for data backup.
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The picture shows a late-model (1985) terminal; that casing, designed by Brascom's industrial director (nickname Bubby), earned him a prominent design award. Unlike previous models, this one was capable of displaying graphic characters such as lines, corners and blocks.
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In 1985, Brascom introduced a 6-MHz Z80B-based microcomputer running the CP/M operating system. This computer, called Foxy, was equipped with the above-mentioned late-model encasing and two external 5-1/4-inch floppy drives. This product never quite made it, due to Brascom's increasing financial problems and its final closedown in about 1986.
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Thanks to **Claudio Chagas** for all this information.\
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Picture : [Club Old Bits](http://orbita.starmedia.com/~cobit/)
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