Spectrum ROM: Routine at 00083

00083: THE 'ERROR-2' ROUTINE

Used by the routine at ERROR_1. The return address to the interpreter points to the 'DEFB' that signifies which error has occurred. This 'DEFB' is fetched and transferred to ERR-NR. The machine stack is cleared before jumping forward to clear the calculator stack.
ERROR_2	00083	POP HL	The address on the stack points to the error code.
	00084	LD L,(HL)	The address on the stack points to the error code.
This entry point is used by the routine at TEST_ROOM.
ERROR_3	00085	LD (IY+0),L	It is transferred to ERR-NR.
	00088	LD SP,(23613)	The machine stack is cleared by setting the stack pointer to ERR-SP before exiting via SET_STK.
	00092	JP SET_STK