Service manual

4.12 Machine Checks
Figure 4–8 and Table 4–9 show parameters for machine
checks. The machine check frame is pushed onto the
interrupt stack.
Figure 4–8: The Stack in Response to a Machine Check
Table 4–9: Machine Check Parameters
Parameter
Value
(hex) or
Bit Description
Byte Count (SP) 18 Size of stack frame in bytes, not including PSL, PC,
or byte count longword
Machine check code (SP+4) 01 Floating-point operand or result transfer error
02 Floating-point reserved instruction
03 Floating-point operand parity error
04 Floating-point unknown status error
05 Floating-point returned result parity error
4–38 VAX 6000 Models 300 and 400 Service Manual