amiga 1200 & 1200hd

release date:            1992 (cbm) and 1995 (at)
	 cpu:            68020 at 14.28 mhz
	 fpu:            none
custom chips:            lisa
			 alice
			 paula
			 gayle
			 budgie
       video:            aga (16.8m colors)
  kickstarts:            3.0 or 3.1
	ram :            2m chip on board
      drives:            internal 880k or 1.76m (rare) floppy
			 2.5" ide hd on selected models
       slots:            1 - trapdoor type expansion
			 1 - pcmcia type ii
       ports:            mouse & joystick
			 parallel
			 serial
			 15khz-31khz rgb video
			 external floppy
			 integrated keyboard
			 stereo rca audio jacks
			 color composite video output

motherboard revisions:   rev 0 - engineering prototype (13/3/92)
			 rev 1 - advanced engineering prototype (29/06/92)
			 rev 1a - initital commodore release (9/9/92)
			 rev 1b - revised release (13/11/92)
			 rev 1d.4 - budgie rev -01 remove e123c and e125c from the a1200 motherboard 
			  	  - budgie rev -02 remove e123c and e125c from the a1200 motherboard
			 	                   remove xr358 470 ohm pull-up resistor 
						   add 470 ohm pull up resistor at pin 43 of u, ie the alice chip
			 rev 2b - budgie rev -01 and -02 
						   remove e123c and e125c from the a1200 motherboard 
						   add 470 ohm pull-up at pin 43 of u2, ie the alice chip
						   change r118 from 470 ohm to 220 ohm 


possible expansions:     - 030,040,060 or powerpc-603 or 604 cpu with accelerator cards
			 - up to 128m ram with expansion cards
			 - pcmcia scsi controler
			 - cdrom & other devices

			 with tower kit:
			 - zorro ii-iii slots adaptor
			 - true color graphic cards
			 - scsi and ide controllers


note:  			 with a tower kit, the 1200 can be as upgradable as a 4000.
			 the a1200 comes with a rather poorly rated power supply of only 23watts.
			 this is often not enough to power the system when a lot of peripherals are connected so a power supply of a higher rating is recommended.

			 the only difference between the a1200 and the a1200hd was the addition of a 2.5" ide hard drive.
			 this was 20mb for europe and 40mb for the usa and australia.

(see additional notes)