C100339 Super Cart board U1 Description U4 Options W1 W2 W3 W4 W5 W6 W7 W8 U5 U3 U2 ------------------------------------------------------------------------ 512k ROM/EPROM EMPTY 00 ++ 00 ++ 00 00 00 00 ++ ++ ++ CS=LOW, BANK SWTICHED 16k/64k SRAM 00 ++ 00 ++ 00 00 00 00 ++ ++ ++ 128k ROM 00 ++ 00 ++ 00 00 00 00 ++ ++ ++ ------------------------------------------------------------------------ 1024k ROM/EPROM EMPTY 00 ++ 00 00 ++ 00 00 00 ++ ++ ++ CS=LOW, BANK SWITCHED 16k/64k SRAM 00 ++ 00 00 ++ 00 00 00 ++ ++ ++ 128k ROM 00 ++ 00 00 ++ 00 00 00 ++ ++ ++ ------------------------------------------------------------------------ 256k ROM EMPTY XX 00 00 ?? ?? ++ 00 ++ 00 00 00 CS=HIGH, NOT BANKED 16k/64k SRAM 00 00 00 ?? ?? ++ 00 ++ 00 ++ ++ 128k ROM CS=0 00 00 00 ?? ?? ++ 00 ++ 00 ++ ++ 128k ROM CS=1 00 XX ++ ?? ?? ++ 00 ++ 00 00 ++ ------------------------------------------------------------------------ 512k ROM (48k net) CS=LOW, NOT BANKED EMPTY ++ ++ 00 ++ 00 00 ++ ++ 00 00 ++ ------------------------------------------------------------------------ 256k ROM/EPROM EMPTY 00 ++ 00 ++ 00 00 00 ++ 00 ++ 00 CS=LOW, NOT BANKED 16k/64k SRAM 00 ++ 00 ++ 00 00 00 ++ 00 ++ ++ 128k ROM CS=0 00 ++ 00 ++ 00 00 00 ++ 00 ++ ++ 128k ROM CS=1 NOT SUPPORTED ------------------------------------------------------------------------ 00=Open ++=Connected ???=TBD XX=Don't care U1 is for the game ROM, U2 is always 74LS02 U3 is always 74LS10 U4 is for the second game ROM or RAM, U5 is always 74LS374