I'm reading about the IBM ASC project, and I see repeated references to a benchmark known as Coronet and/or Coronet II. Does anyone know what this did?

On the 6502, the brk instruction is a software interrupt. Like any other interrupt, it pushes the status word to the stack and then the program counter, before transferring control to an interrupt routine. But the weird thing is, the processor sets a bit in the status word as it's pushed to the s...