Before purchasing a 6 chips kit, make sure your motherboard is compatible for such set. You need your motherboard to be fitted with 6 IC supports.
Some versions of motherboards only have 2 support fitted for the 2 chips set version. Other motherboard will have the ROM chips directly soldered to it. No supports.If you insist in fitting 6 chips set on such motherboards, you will have to set modify them to fit the 6 IC supports required. See last pictures for the kind of supports you need to have.
Open your Atari and check your motherboard before purchasing any TOS ROM set.
Although the fitting of these is a simple task, please be sure that you know what you're doing before fitting. You will need to take your time and take care not to bend the pins.
Some motherboards indicate which Rom is which (Hi-0, Hi-1, etc…), if your board does not have this information, but only Uxx, Uxx… then look for the information online. Other a search for pictures will show you the correct placement.
Some motherboards are designed to accept 2 chips and 6 chips sets. On these boards, 3 solder pads are present to configure the board to use 2 chips (1M) or 6 chips (256K). You must make sure you configure the board to 6 chips (256K). This may require soldering.
