Front Panels
Main Panel
The main board includes the buttons, status LEDs and TIL313 displays for the data byte.
The 2 switches will control the main board RAM. When the protect switch is to the right the main board RAM is write protected. When the disable switch is to the RAM back-up via battery.
Main board RAM is only 256 bytes and located from address 0000 to 00FF (if no RAM card is used) or from address FF00 to FFFF (if a RAM card is used).
When starting the Cosmicos with main board RAM located at FF00 the memory protect switch should be set to protected. This is to avoid any Cosmicos software detecting RAM above FF00 and subsequently setting the stack pointer to FFFF.
HEX & 7 segment Panel
The hex & 7 segment panel includes the hex keyboard connected to OUT/INP 5 and 8 TIL313 displays controlled by OUT/INP 6.