ACE2NOKBV2MK2


The ACE2NOKBV2MK2 design is approaching completion soon I'll be sending off for test PCBs, the shape of some of the components might look a bit odd and the schematic has more components than needed.



Not the bumps on the bottom of the biggest DIL chips. This is not an accident they are 2 chips overlayed. The 6116 chips come in two size the old HM6116LP variety is 15.24 mm wide and slow with access time between 200-120 NS, all of which are faster than the original ace chips, while the newer ICT6116 are a slimline 7.62 mm, faster and more expensive.

From the underside, you can see I've parked the outline of the wider chips in red and in one case the narrower in blue. You do not have to fit both one but I'd be consistent and fit either.

You can see there is a Turbo option this is simply the modification from here. I'm not sure the slower chips will work with the Turbo option enabled, in fact, I'm not sure it will work at all. In addition to the changes to more modern memory and EEPROM that can be programmed by USB devices, the only other mods are amplification of the composite video and an extra resistor to protect the speaker output.

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