Does anyone know what bits 13,14 and 15 are for at IO address 0x200 ?
There is a lot of conflicting information in the docs I have read. Some say bit 13 is the Cartridge and others say it is IR and bit 14 is the cartridge. I have even seen bit 15 as the interrupt enable bit but it seems a bit strange as there is a seperate master interrupt enable register.
Also does anyone have any information on IO registers 0x134, 0x136 and 0x300 ?