Yes this works in Mach3, but what about Mach4?

How can I do a similar thing there?

Found it:

Put a Q0 i front and remove the minus sign
Then put a N0 as the first line in the file been called:

M98 Q0 (c:\tst\t2.tap)
M30

In t2.tap:

N0
g1 x10
m99