Motorola MCPN750A, IH5 manual Calculate the external bus clock speed of the MPU

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PPCBug

7.Calculate the external bus clock speed of the MPU.

8.Delays for 750 milliseconds.

9.Determines the CPU board type.

10.Sizes the local read/write memory (i.e., DRAM).

11.Initializes the read/write memory controller.

12.Sets base address of memory to $00000000.

13.Retrieves the speed of read/write memory.

14.Initializes the read/write memory controller with the speed of read/write memory.

15.Retrieves the speed of read only memory (i.e., Flash) from

NVRAM.

16.Initializes the read only memory controller with the speed of read only memory.

17.Enables the MPU’s instruction cache.

18.Copies the MPU’s exception vector table from $FFF00000 to $00000000.

19.Verifies MPU type.

20.Enable the super-scalar feature of the MPU (boards with MPC750 type chips only).

21.Determines the debugger’s console/host ports, and initializes the appropriate devices (PC16550/GD54xx/Z85C230).

22.Displays the debugger’s copyright message.

23.Displays any hardware initialization errors that may have occurred.

24.Checksums the debugger object, and displays a warning message if the checksum failed to verify.

25.Displays the amount of local read/write memory found.

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