To use on your BBC Micro, download beeb_memory_tester.ssd and write
it to a floppy disk.
The memory is tested 16 K at a time. There are three test programs for
the lower half - Tlower3 (runs in mode 3), Tlower4 (runs in mode
4) and Tlower7 (runs in mode 7) - and three for the upper half,
similarly: Tupper3, Tupper4 and Tupper7.
The test process continues indefinitely until an error is found or you
press BREAK. For all except Tlower7, you'll see stuff happening on
screen as the testing process proceeds.
(In principle, the memory ought to behave the same regardless of mode! But if your Beeb seems unreliable in some mode-dependent fashion, as mine does, this might help narrow things down...)
Prerequisites: Python 2.x on PATH, 64tass on PATH
Run make from the terminal. (To manually provide path to Python
and/or 64tass, supply PYTHON=xxx and/or TASS=xxx` on the make
command line.)
The output is placed in a
BeebLink volume, beeb/ in
the working copy. The output files are stored in drive 1.
Run make ssd to produce beeb_memory_tester.ssd, suitable for
writing to a disk.
The BBC Micro memory tester is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this code. If not, see https://www.gnu.org/licenses/.