BeebEm - BBC Micro and Master 128 Emulator

Acorn ARM Second Processor

BeebEm emulates the Acorn ARM Second Processor board, also known as the ARM Evaluation System. The ARM interpreter and disassembler code is based on the Tarmac software written by David Sharp to whom we are grateful for allowing us to use it with BeebEm.

The Acorn ARM Second Processor was an 8MHz system running with 4MB RAM on an ARM 1 RISC processor.

You start the Acorn ARM by selecting ARM Second Processor on the hardware menu. The ARM Second Processor has no operating system but relies on a sideways ROM to provide a command line prompt to the user. Once you see the A* prompt, type *HELP SUPERVISOR to see what inbuilt commands are available.

The ARM Evaluation System came with 6 discs full of software. Disc 3 is included in the 'DiscIms' folder which contains ARM Basic. Load the armdisc3.adl disc image (ensuring you are in ADFS mode), type *MOUNT 4 and *AB to load ARM Basic. The remaining disc images plus a hard disc image containing all 6 disc images can be downloaded from Jon Welch's web site - Acorn ARM Discs.

These discs contain the Acorn ARM application software including:

TWIN - Editor
ARM Assembler/Linker/Debugger
ARM Basic
Lisp
Prolog
Fortran 77
General File Utilities

You will also find some manuals for the ARM Second Processor on Jon's site as well. If you have any manuals or other disc images that Jon does not have feel free to send them to Jon to add to the library.