Can all of the hub RAM be used by a user program if interrupts are disabled? I looked at the documentation online, and it seems to be a bit out of date. According to the "Propeller II Documentation" there are 16 longs used in high memory that are used by the debug interrupt. Initially, these contain a RETI0, but could be replaced by a JMP to a debug ISR. I assume I should leave these in place in case I start a new cog, which would immediately get a debug interrupt. Is this still the case, or is more memory used now. I recall some discussion about reserving hub RAM to save the state of the cog on a debug interrupt. How much of the high memory should a user program avoid?
If I don't start a new cog, and I don't enable interrupts, can I use all of the high memory? By the time my program starts the debug interrupt for cog 0 would have occurred and the RETI0 would have executed leaving interrupts disabled. So it seems like it save to used the entire hub RAM for my program.