BBC Micro B+ 128K + 48K ROM

This was the final BBC model, it squeezed every last bit of memory out of the 8-bit computer. It is the same as the BBC Model B+ 64K with the addition of a further 64K RAM which is used as sideways RAM and can have ROM images loaded into it. Compared to the BBC Model B, it has:
  A redesigned motherboard with the ROM sockets moved to the lefthand side of the board so that they are not covered by the keyboard.
Tthe CPU is changed from a 6502 to a 65C12.
 A new OS version 2.00 to support the new features.
The startup messages is changed from "BBC Computer" to "Acorn OS"
 A Western Digital 1770 disc controller, instead of the Intel 8271, which supports ADFS as well as DFS
 A new DFS version 2.10 to support the WD1770
Additional 32K RAM with 20K for shadow video memory and 12K workspace
Additional 2 ROM expansion sockets

It was launched in 1984 shortly after the BBC Model B+ 64K and was soon replaced by the BBC Master.

For further details visit http://chrisacorns.computinghistory.org.uk/Computers/BBCB+128.html

Our model is in excellent condition with all the original packaging. The serial number is:
01-ANB55-7500060

Manufacturer: Acorn
Date: 1984

Other Systems Related To BBC Micro B+ 128K + 48K ROM:

Item Manufacturer Date
Acorn BBC Micro Model A (Issue 2 Board) Acorn Computers Ltd Unknown
Acorn AEH02 Archimedes NSM Acorn Computers Ltd Unknown
Busicomputers Prophet 3 Acorn Computers Ltd Unknown
Acorn 6502 Microcomputer Board Acorn Computers Ltd 1979
Acorn System 1 Acorn Computers March 1979
Acorn System 3 Acorn 1980
Acorn Atom Acorn 1980
Black Acorn Atom Acorn January 1980
Acorn BBC Micro Model A - Issue 1 Acorn 1981
Acorn BBC Micro Model A Acorn 1st December 1981
Acorn BBC Micro Model B Acorn 2nd December 1981
German BBC Micro (GNB09) Acorn 1982
Acorn Business Computer (ABC) Acorn 1983
Acorn Cambridge Workstation Acorn 1983
Busicomputers Prophet 2 Acorn 1983
Acorn Electron Acorn July 1983
Acorn Electron (German) Acorn July 1983
Acorn Electron with Turbo Board Acorn July 1983
US BBC Micro (UNB09) Acorn October 1984
Acorn BBC Micro Model B+ (64K) Acorn July 1985
Acorn BBC Master 512 Acorn 1986
Acorn BBC Master 128 Acorn 1986
Acorn BBC Domesday System Acorn Computers Limited 1986
Acorn Communicator Acorn 1986
Acorn Econet Terminal Acorn Computers Ltd 1986
Acorn - BT Merlin M2105 Acorn Computers / British Telecom 13th May 1986
Acorn BBC Master Compact Acorn September 1986
Acorn Archimedes 310 Acorn 1987
Acorn Archimedes 305 Acorn 1987
Acorn A680 Acorn 1988
Acorn Archimedes A500 Acorn 1988
Acorn Archimedes A500 Acorn 1988
Acorn A3000 Acorn 1989
Acorn R140 Acorn June 1989
Acorn Archimedes A440 Acorn July 1989
Acorn R260 Acorn 1990
Acorn Archimedes A5000 ALB12 Acorn 1991
Acorn A5000 ALB53 Acorn 1991
Acorn A5000 ALB22 Acorn 1991
Acorn A4 Laptop Acorn 1992
Acorn A3020 Acorn January 1992
Acorn A4 WLP-530N7 Acorn Rev. B Acorn June 1992
Acorn A3010 Acorn September 1992
Acorn A4000 Acorn September 1992
Acorn Risc PC 600 Acorn January 1994
Acorn Risc PC 600 ACB25 Acorn April 1994
Acorn Risc PC 600 ACB45 Acorn April 1994
Acorn A7000 Acorn 1995
Acorn RISC PC 600 - Prototype Acorn 1995
Acorn A7000+ Acorn 1995
Acorn SchoolServer Acorn Ltd 1995
Acorn Risc PC 600 ACB60 Acorn July 1995
Acorn RISC PC700 System Acorn July 1995
Acorn Xemplar Matrix NC Acorn 1996
Acorn StrongARM RiscPC Acorn 1996
Acorn Stork Notebook Acorn Computers Ltd 1996
Acorn Fast NC - Serial Number 1 Acorn Computers Ltd 1997
Acorn Phoebe Acorn 1998
Acorn DeskLite Prototype Acorn June 1998

This exhibit has a reference ID of CH28847. Please quote this reference ID in any communication with the Centre for Computing History.

 

BBC Micro B+ 128K + 48K ROM


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