6502 BBC BASIC for Acorn System

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BBC BASIC appears to have been initially developed on the Acorn System 5 as "Acorn New BASIC". The code runs at &A000-&DFFF, workspace is at &2800, PAGE=&3000, HIMEM=&A000. Access to the MOS is via the System/Atom MOS entry block. Only the System MOS, COS and DOS functions are present, all the BBC's OSWORD functions and VDU graphics functions are absent.
SBASIC1 Basic1.zip	Code Source	16K 39K	BBC BASIC 1/System BASIC ("Acorn New BASIC") Source assemblable with ARM BASIC 65 to target either the Atom/System or the BBC.
SBASIC2 Basic2.zip	Code Source	16K 54K	BBC BASIC 2.00 for the Acorn System. Source assembleable with ARM BASIC 65 to target either the Atom/System, the BBC, or the Commodore 64.
SBASIC3 Basic2.zip	Code Source	16K 54K	BBC BASIC 3.10 for the Acorn System. Source assembleable with ARM BASIC 65 to target either the Atom/System, the BBC, or the Commodore 64.
SBASIC.ssd	Disk image	50K	System DOS disk image with BBC BASIC 1.10, 2.00 and 3.10 Also has a few simple tools: MINI65 tiny 6502 disassembler. Press SPACE to toggle memory dump, RETURN to scroll, A to select a new address. You may need to run NOIRQ before running BASIC if your IRQ line is floating.

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Authored by J.G.Harston
Last update: 05-Apr-2018