===== 11 SYS CPU BREAK SYSCALL | BIOS 19951204 System ROM Version 3.0 11/18/96 A

cpu/BREAK and SYSCALL (the BIOS's handler decides what reaches A(40h))
break: n 1 code 9 bd 0 epc 8001A510 at 8001A510 badvaddr 80016BF6 reg 00000000
syscall 0: none, at 8001A528, reg 00000000
syscall 4: none, at 8001A528, reg 00000000
Done.