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I'm using the MCB251 board with the Intel 80C251SB CPU. I'm trying to program an EPROM using the hex file that uvision creates. My project tests fine using the Monitor Eprom with debug but I can't get it to do anything with a user eprom that I programmed. Any help would be greatly appreciated. 1. Do I have to include the Start251.a51 to my project?
Well, in C51 if you don't explicitly include it, the tools will automatically use the default version. So, if the default version is appropriate for your target, you don't need to explicitly include it However, on the 251, the startup code is almost always required because of the 2 configuration bytes. If you don't include the startup code, you MUST set the configuration bytes manually with the device programmer or you must create them another way in the EPROM. Jon
I include the file in uvision but when I program the eprom with the hex file there is nothing at fff8 or fff9. 1. How would I go about setting the configuration bytes manually?
How about the following assembly file...
cseg at 0FFF8 DB 0F8h DB 0D2h end
I finally got he config bytes in but my program still doesn't work. I'm trying to get the blinky program that came with the software to work from an eprom. I have the DIP switches set as: uart-int-off uart-ext-off src/d2 -off page -off monitor -off 51/151 -off Map1 -off Map0 -off A17 -off I tried the configuration bytes you sent but it did not work. Any help on this will be appreciated.