suggestion from Bernd: Add a config sys switch [...]
No need to add a non-standard CONFIG.SYS switch for it.
Or probably easier: Insert such code in dosidle.asm ... (easier because it already is in Assembly language).
HLT is my favourite instruction and I've used it in a former embedded system project of mine lowering power consumption considerably. I like it so much that UDMA is dead because of it :-(
All it's needed to do is insert a HLT instruction before the IRET in kernel.asm, _int28_handler
Lucho
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