I have a project for AT89c2051, which only include one file named main.c. the following is the content of main.c:
sfr P1 = 0x90;
void main() { P1 = 0x0a5; while(1); }
in the dialog of "Options for Target '...'"(target sheet) i setup as follows: Memory Model: Small: Variables in DATA
Code Rom Size: Small: Program 2k or less and the others item are default(blank).
My link out file is as follows(main.m51),
BL51 BANKED LINKER/LOCATER V6.15 02/11/2009 23:24:55 PAGE 1
BL51 BANKED LINKER/LOCATER V6.15, INVOKED BY: E:\KEIL\C51\BIN\BL51.EXE main.obj TO thk_display IXREF MEMORY MODEL: SMALL INPUT MODULES INCLUDED: main.obj (MAIN) E:\KEIL\C51\LIB\C51S.LIB (?C_STARTUP)
LINK MAP OF MODULE: thk_display (MAIN)
TYPE BASE LENGTH RELOCATION SEGMENT NAME -----------------------------------------------------
* * * * * * * D A T A M E M O R Y * * * * * * * REG 0000H 0008H ABSOLUTE "REG BANK 0" IDATA 0008H 0001H UNIT ?STACK
* * * * * * * C O D E M E M O R Y * * * * * * * CODE 0000H 0003H ABSOLUTE 0003H 07FDH *** GAP *** CODE 0800H 000CH UNIT ?C_C51STARTUP CODE 080CH 0005H INBLOCK ?PR?MAIN?MAIN ...
******************************************************* Program Size: data=9.0 xdata=0 code=20 LINK/LOCATE RUN COMPLETE. 0 WARNING(S), 0 ERROR(S)
My questions: 1. How can i put models(C_C51STARTUP and ?PR?MAIN?MAIN) in 0x0100--0x07ff? For AT89c2051's rom only exists in this range.
2. The model of ?C_C51STARTUP came from where? Can it is need? If is not need how can i remove it?
3. I think keil is difficult to used than other tools such as IAR. It is realy?
my email is hbzou@iipc.zju.edu.cn Thanks!
"...0x0100--0x07ff? For AT89c2051's rom only exists in this range."
I think you should check that range.
That's not what I remember from when I last used the part.
Are you using the free evaluation version? If so, did you take care to read the Limitations:
http://www.keil.com/demo/limits.asp
"I think keil is difficult to used than other tools such as IAR. It is realy?"
Using any new, unfamiliar, tool will always seem more difficult than an old, familiar, tool.
Thus, personally, I find IAR more difficult to use than Keil.
The problem is compounded if you are not prepared to spend the time to read the documentation...