The Microcontroller Idea Book - Jan Axelson's Lakeview Research

Chapter 13
With these added components and Listing B-2, you can program a DS1225 NV RAM, a
28(C)64 EEPROM, or a 27(C)64 EPROM with an Intel Hex file.
One use would be to program an EPROM for a non-BASIC-52 system, where EA is tied low
and on bootup, the 8052 runs a program beginning at 0 in external code memory, instead of
running the BASIC-52 interpreter in internal ROM. For this use, you must add A000h to
the values given in all ORG directives. For example, you would change ORG 0 to ORG
A000h, and change ORG 200h to ORG A200h. You can then use Listing B-2 to copy the
program into the EPROM at A000h, remove the EPROM and install it at 0 in code memory
in your non-BASIC-52 system. On bootup, the 8052 will run the program in EPROM.
Another Way to Program EPROMs
Listing 13-8 is another program that you can use to copy information from external data
memory into an EPROM, EEPROM, or NVRAM. To use this program, you must specify
the locations to copy (the source), the locations to copy to (the destination), and the device
type to copy to. The program does the rest. With this program, you can copy information
directly from RAM or other memory to another device, without uploading or translating to
Intel Hex format.
The program prompts you for and stores information about the programming algorithm and
addresses to program and copy from. BASIC-52’s PGM instruction then uses this information
to program the selected locations.
238 The Microcontroller Idea Book