In a CF51MM256CLL, do not put /CS1 to work. Have no problem with /CS0, but /CS1, when enabled, is at 0 (active) except for 42ns (BUS CLK is 24 MHz, for USB usage...).
In Reference Manual MCF51MM256RM page 4-18, in MBCSCR1 register, are 4 undocumented bits: SWSEN (b31), BEM (b5), BSTR (b4), and BSTW (b3). Could be one of this the problem?
I use only 16 locations in each CHIP SELECT, with non-multilexed 8 bit bus. Code for MINI FLEX BUS initialization follows:
Can anyone help me?