The I/O ports can be see also when you type
$321 register for the id of the bank to switch
b0, b1, b2 which can select the id of the bank wanted.
This register is in firmware 2, and can mirror $314 calls to change to overlay memory
$342 : twilighte board register
b0,b1,b2 version number is equal to 1 or 2, but can be overwritten (There is not read only protection
b5 : if it's equal to 0 if we are on eeprom set, 1 if it's ram set
$343 : Twilighte banking register
This register can contains values from 0 to 7 included. It defines the "set" of 64KB which be present in slot 4,3,2 and 1 of register $321 which contains the bank.
Last update: 2022-11-23