lccio.src

	.page
	.subttl  lccio

cntst	= *


;     defs for low cost controller
;
;     written by glenn stark
;     4/1/80
;
;   (c) commodore business machines
;

timer1	= $1805		;  timer 1 counter


;   mos 6522 address $1c00


        *  =$1c00

dskcnt   *=*+1          ;  port b

; disk i/o control lines
; bit 0: step in
; bit 1: step out
; bit 2: -motor on
; bit 3: act led
; bit 4: write protect sense
; bit 5: density select 0
; bit 6: density select 1
; bit 7: sync detect


data2    *=*+1          ;  port a

; gcr data input and output port

ddrb2    *=*+1          ;  data direction control
ddra2    *=*+1          ;  data direction control

t1lc2    *=*+1          ;  timer 1 low counter
t1hc2    *=*+1          ;  timer 1 hi countr

t1ll2    *=*+1          ;  timer 1 low latch
t1hl2    *=*+1          ;  timer 1 hi latch

t2ll2    *=*+1          ;  timer two low latch
t2lh2    *=*+1          ;  timer two hi latch

sr2      *=*+1          ;  shift register

acr2     *=*+1

pcr2     *=*+1

ifr2     *=*+1

ier2     *=*+1


	* = cntst


;	.end