00100	;System defaults etc.
00200	
00300	   CUR ← 22	;Chr DPY cursor
00400	   CURH ← 23	;CUR+1
00500	
00600	   DPYRAS ← 171760	;Raster offset.
00700	   DPYROW ← 171761	;Row offset
00800	   DPYCON ← 171764	;Display control register.
00900	   DPYMUX ← 171765	;Vidio mixer
01000	
01100	   DCURL ← 171762	;DPY cursor low
01200	   DCURH ← 171763	;DPY cursor high
01300	
01400	   BRG0 ← 176424	;Bit rate generator chan 0
01500	   BRG1 ← 176425	;Chan 1
01600	   ACIAC ← 176434	;SI/O Control register.
01700	   ACIAD ← 176435	;SI/O Data register.
01800	
01900	   FDSKC ← 176420	;Disk command and status reg.
02000	   FDSKT ← 176421	;Track register
02100	   FDSKS ← 176422	;Sector register
02200	   FDSKD ← 176423	;Data register
02300	
02400	   DSKSEL ← 176437	;Mux and DRQ
02500	
02600	   KBD ← 173370	;Keyboard data register
02700	   KBC ← 173371	;Keyboard control register
02800	
02900	   RTCAL ← 173372	;Timer A low
03000	   RTCAH ← 173373	;Timer A high
03100	   RTCAC ← 173374	;Timer A control
03200	
03300	   RTCBL ← 173375	;Timer B low
03400	   RTCBC ← 173376	;Timer B control