C300565 Super Cart board U1 Description U2 Options W1 W2 W3 W4 W5 W6 U3 U4 U5 ------------------------------------------------------------------- 512K ROM/EPROM Empty 00 ++ 00 ++ 00 00 ++ ++ ++ cs=low, bankswitched 64k/128k SRAM 00 ++ 00 ++ 00 00 ++ ++ ++ 128K ROM/EPROM 00 ++ 00 ++ 00 00 ++ ++ ++ ------------------------------------------------------------------- 1024k ROM/EPROM Empty 00 ++ ++ 00 00 00 ++ ++ ++ cs=low, bankswitched 64k/128k SRAM 00 ++ ++ 00 00 00 ++ ++ ++ 128K ROM/EPROM 00 ++ ++ 00 00 00 ++ ++ ++ ------------------------------------------------------------------- 512k ROM/EPROM (48k net) cs=low, not banked Empty ++ 00 00 ++ ++ ++ ++ 00 00 ------------------------------------------------------------------- 256k ROM/EPROM Empty ++ 00 00 ++ ++ ++ ++ 00 00 cs=low, not banked ------------------------------------------------------------------- 128K ROM jumpered U4-Pin 7 + 8, U5-Pin 1 + 2 cs=High, not banked Empty 00 ++ 00 00 00 00 00 00 00 ------------------------------------------------------------------- 256K ROM jumpered U4-Pin 7 + 8, U5-Pin 1 + 2, U5-pin 6 + U4-pin 5 cs=High, not banked Empty 00 ++ ++ 00 00 00 00 00 00 ------------------------------------------------------------------- 00=Open ++=Connected ???=TBD U1 is for the game ROM, U2 is for the second game ROM or RAM, U3 is always 74LS02, U4 is always 74LS00, U5 is always 74LS374.