Hello!
We have a DS80C400 based system. We have a CPLD which has chip-select based on some Address lines and PCE0#. The CPLD uses RD# and WR# lines instead of PSEN# and WR#.
We have configured the MCU to use PCE0-3# as PCE lines (instead of I/O) and Address lines A16-A21 to be generated automatically.
We are trying to access 0x100000 (A20 is HIGH) using the FVAR(unsigned char, 0x100000). However, the PCE0# is not getting asserted (it is at HIGH always).
ANy solution in mind? Please contact me for further info. Also, Thanks in Advance!!
Thanks & BR, Govinda Padaki