Currently I am working on MC68360 processor to enable the chip select 7. I am setting the Base register and Option register with the values 0x02010001 and 0xFFFFF004 respectively, But after turning on the board, I am not able to see the CS7 toggling.
Memory Map: 0x00000000 to 0xFFFFFFFF
SRAM Bank for CS7: 0x02010000 to 0x02011000
SRAM Bank for CS5: 0x02000000 to 0x02000800
MBAR EQU $03FF00
PEPAR EQU $031016
GMR EQU $031040
BR7 EQU $0310C0
OR7 EQU $0310C4
moveq.l #7,d0 ; "0111" is the function code for CPU Space
movec d0,SFC ; Store "0111" into both the Src Fcn Code Reg
movec d0,DFC ; and the Dest. Fcn Code Reg
moves.l MBAR,d0 ; load MBAR value into d0
andi.l #$FFFFE000,d0 ; mask lower 13 bits
move.l d0,a5 ; save base address in a5
Port E assignment: MOVE.W #$0094,PEPAR
Global Memory Register (GMR): MOVE.L #$00001200,GMR
OR5 : MOVE.L #$FFFF0004,OR5
BR5 : MOVE.L #$02000001,BR5
OR7 : MOVE.L #$FFFFF004,OR7
BR7 : MOVE.L #$02010001,BR7
currently on CS7, no hardware connected.
We had configured registers for chip selects 0-6, thay all working. The CS7 we are trying to enable is not working.
When we swapped BR5 and OR5 with BR7 and OR7, then CS7 working but CS5 is not working.
Please help me. Thank you.