Listing 3ıItıs all there if you look for it. Here are the little assembler routines to kill time in the RTL8019AS init procedures.

#asm
tickwait::		; Delay loops necessary for reset/etc.
	ld	b,h
	ld	c,l
	ld	de,(TICK_TIMER)
tickwloop:
	or	a
	ld	hl,(TICK_TIMER)
	sbc	hl,de
	or	a
	sbc	hl,bc
	jr	c,tickwloop
	ret

mswait::						
	ld	b,h
	ld	c,l
	ld	de,(MS_TIMER)
mswloop:
	or	a
	ld	hl,(MS_TIMER)
	sbc	hl,de
	or	a
	sbc	hl,bc
	jr	c,mswloop
	ret
#endasm

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