Hey everyone,
I am looking at messing around with making up a dev style repro cart. It will be mainly for 4K rom images. I know that there is a Harmony cart option but I still want to try and create my own cart. I do own a harmony cart.
I have done some comparisons of the cartridge slot pinout and a 27C32 4Kb eprom and have found that it is nearly pin perfect except for a couple.
The address links on the Atari cart slot go up to A12 but on the eprom they only go up to A11. I read on another guide that you connect A12 of the cart slot to a logic inverter and then the output from that goes to CS pin of the eprom.
The only thing is the 27C32 does not have a CS pin. Only a OE pin. Is this the same? Do I actually need the logic inverter?
Thanks everyone
I am looking at messing around with making up a dev style repro cart. It will be mainly for 4K rom images. I know that there is a Harmony cart option but I still want to try and create my own cart. I do own a harmony cart.
I have done some comparisons of the cartridge slot pinout and a 27C32 4Kb eprom and have found that it is nearly pin perfect except for a couple.
The address links on the Atari cart slot go up to A12 but on the eprom they only go up to A11. I read on another guide that you connect A12 of the cart slot to a logic inverter and then the output from that goes to CS pin of the eprom.
The only thing is the 27C32 does not have a CS pin. Only a OE pin. Is this the same? Do I actually need the logic inverter?
Thanks everyone