Texas Instruments TMS370 manual Filling a Block of PC Memory With a Value Ð the Fill Command

Filling a Block of PC Memory With a Value

3.6Filling a Block of PC Memory With a Value Ð the Fill Command

Use the fill command to fill a block of PC memory with a value.

Step 1: Define the size of the block by answering the following two prompts:

Fill Start Address: 0000h

Size (in bytes) : 0000h

Enter the start address in the range (0000h±FFFFh). Otherwise, an error message is displayed as follows:

FILLPC start address out of bound (hit any key)

Press any key to erase the error message and return to the display command menu.

At the second prompt, enter the number of bytes from the start address you want to fill. If the end address of the fill block (i.e., start address + size ± 1) is out of the legal range, an error message is dis- played as follows:

FILLPC end address out of bound (hit any key)

Press any key to erase the error message and return to the display command menu.

Step 2: Supply a value to be filled in the memory range defined in Step 1.

Fill value: 00h

Enter a hexadecimal value within the range (00h±FFh). If an out-of-range fill value is given, an error message is displayed as fol- lows:

<FILLPC> Fill value out of range ± (00h..FFh) (hit any key)

Press any key to erase the error message and return to the display command menu.

If all three parameters are entered correctly, the programmer fills the specified block of PC memory with the given value and displays them on the dump win- dow.

When you program EPROM memory, it is often best to fill the memory range with the value FFh before loading the object file. This prevents unused bytes from being programmed, and this decreases programming time.

3-8 Operating in the Display Window