[TUHS] LSX issues and musing

[Phil Budne]

A quick google for _decmch found:

https://www.tuhs.org/cgi-bin/utree.pl?file=LSX/sys/low.s

.....
.if DEC
.if EIS-1
.globl	_decmch

rxcs = 177170
rxdb = 177172

_decmch:
	mov	r2,-(sp)
	mov	$rxdb,r1
	mov	4(sp),r0
	asl	r0
	add	4(sp),r0
	clr	r2
.....