(41) AMC OS/X - XEQ Q

[Ángel Martin]

I've seen that the issue happens when the SandMath is also plugged in, probably due to the I/O_SVC interrupt effect: it leaves a return-to address in the RTN stack not expected by the CALC_ON code in the OS/X, and thus the failure to detect the event. I need some time to troubleshoot this properly, stay tuned...