Were there any games/software that used memory beyond what was advertised as available to BASIC on the machine ?
- On home / personal computers any time before 1984 .
- Without needing to plug in any additional hardware .
How common was it on home / personal computers of this era that assembly-code or BASIC could access more memory than what was advertised as available to BASIC on the machine (e.g. like storing non-video data on video-memory)?
Was there any other type of RAM that was normally not accessible to BASIC?
Added To Question
If a machine had 24k RAM, and only 18k of that available to BASIC, was that 8k empty, or, on any existing machines, was anything ( other than assembly-code which could use all of the 24k ) stored on there, if anything was stored on there, exactly why was it stored there .
An example, may be for the Bally Astrocade, using video memory, although I don't know any details / games / software .