3.1 ROM Installation Instructions for the Amiga A2000

CAUTION:

Before any internal expansion device is installed, the system must be turned off and disconnected from the power supply. All cables for external peripherals should be disconnected from the system.

WARNING:

Installation of ROM chips should be performed by an authorized Commodore-Amiga Service Center or by your Commodore-Amiga dealer. Neither Commodore nor Village Tronic will be responsible or liable for any damages caused by improper installation of the ROM chips. ROM chips are sensitive to static electricity. Contact with a chip when high levels of static electricity are present could damage the chip. Touching a nearby grounded metal surface, before touching the chip can help reduce static levels.

A2000 - Installing the 3.1 Kickstart ROM:

1. Remove the top cover. One screw on the back and two on each side secure the top cover to the Main Assembly. With the computer facing you, grasp the sides of the top case and carefully slide it towards you and up. 2. Remove the seven screws that secure the power supply and drive assembly to the base. Next, remove cables from the power supply and carefully lift it out of the way.

IMPORTANT: If the system includes an A2620 or A2630 Accelerator Board,
an upgrade of the board's ROM chips may be required.

3. For A2620, the ROM chips at position U4 and U5 must be revision -06 or higher. For A2630, the ROM chips at position U102 and U103 must be revision -06 or higher. You can check the revision without opening the case; at the processor selection screen press SHIFT-M to enter the A26x0 monitor. From the monitor use the "version" command. The ROM chips are ok if a date of 01/15/91 or later is displayed. If the ROM chips are old, then remove the accelerator board from the Amiga Coprocessor slot. For A2620, locate and remove the chips at positions U4 and U5. Location U4 is updated with the Low ROM, P/N# 390282-06 or 390282-07, location U5 is updated with the High ROM, P/N# 390283-06 or 390283-07. For A2630, locate and remove the chips at positions U102 and U103. Location U102 is updated with the Low ROM, P/N# 390282-06 or 390282-07, location U103 is updated with the High ROM, P/N# 390283-06 or 390283-07. Align the ROM IC's with the sockets and press firmly into place. Re-insert the board and test the system before proceeding with the Kickstart ROM installation. 4. Locate the operating system ROM (see below). The old ROM should be marked 315093-01, -02 or, if you have already upgraded your system, V2.04 (37.175). Note the orientation of the old operating system ROM, then remove it from the socket. Do not discard this IC.

IMPORTANT NOTE: There are different versions of the PCB.  The 
Installation differs depending on the PCB revision.

	i> Older machines are marked on the left side with the "(c) 1986 
           COMMODORE", "AMIGA 2000" and "MADE IN GERMANY (BSW)".  The 
           Operating System ROM, U2, is located just to the right of the 
           68000.  Pin 1 faces forward.  For these boards, the ROM IC 
           must have pin 1 connected to pin 31.  
 
       ii> Newer A2000 motherboards are marked "B2000-CR" in the lower- 
           left corner.  The Operating System ROM, U500, is located just 
           to the right of the 68000 and below Fat Agnus.  Pin 1 faces  
           rear.  For Rev 4 and above, the ROM IC must not have any
	   connection.  For Rev 3 boards, the ROM socket must have pin 1
	   connected to pin 31 and the ROM IC must have pin 21 connected
	   to bent-up pin 31.

5. Align the 3.1 ROM with the socket and press firmly into place. Be cautious not to bend pins. 6. Installation is now complete. It is advisable to test the system after reassembling the sub-chassis and drives, but before replacing the top case.

(C) Copyright Village Tronic Marketing GmbH, Sarstedt, 25.08.1994