Dear all,Can you help me?Thank you in advance! I used uVision(Keil C51 V7.01) to connect to Monitor-51 which was made by myself.But it didn't work.When I built my project,it showed as below: Build target 'Target 1' assembling mon51asm.a51... assembling STARTUP.A51... linking... *** WARNING L5: CODE SPACE MEMORY OVERLAP FROM: 8000H TO: 8013H *** WARNING L1: UNRESOLVED EXTERNAL SYMBOL SYMBOL: ?C_START MODULE: STARTUP.obj (?C_STARTUP) *** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL SYMBOL: ?C_START MODULE: STARTUP.obj (?C_STARTUP) ADDRESS: 801EH Program Size: data=9.0 xdata=0 code=32803 creating hex file from "mon51test"... "mon51test" - 0 Error(s), 3 Warning(s). Then I started debug session in spite of the warnings,it show "ERROR 22：NO CODE MEMORY AT 0x8000".And the uVision couldn't connect to Monitor-51.How should I solve this problem.Thank you very much for your advice.
Do you have main() functions?
My code is a simple testing ASM program as below: ORG 8000H LOOP: SETB P1.0 LCALL DELAY CLR P1.0 LCALL DELAY AJMP LOOP DELAY: MOV R7,#250 D1: MOV R6,#250 D2: DJNZ R6,D2 DJNZ R7,D1 RET END
Hi, Can you tell me which uC are you using,are you using internal or external memory for the code...? Rgds Raj Shetgar
I use At89S52 and external memory(62256) for my code.