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Q: Can you not write directly to video memory on the Pi, rather than do this cumbersome mailbox stuff? EDIT: Apparently calling SWI &31 would give you the loca
by b800h 3y ago
Q: Can you not write directly to video memory on the Pi, rather than do this cumbersome mailbox stuff?
EDIT: Apparently calling SWI &31 would give you the location, allowing direct access
- duskwuff 3y ago> EDIT: Apparently calling SWI &31 would give you the location, allowing direct access What gives you that impression? INT 31h is how you make a DPMI call in an x86 PC BIOS system, but that's entirely specific to those systems. There's no equivalent on ARM.
- b800h 3y agoMy mistake - I was reading the RISC OS documentation and assumed that SWI &31 in RISC OS (not x86) was a hardware interrupt call and not something specific to RISC OS itself - apologies, middle of the night, brain fog!