We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
1. what is the difference between symbol A and ACC used for accumulator. 2. when i use (in assembly)PUSH A, i get error. PUSH ACC does not give me error. 3. in the debug environment i do not understand what does following register do or what does it stand for. pl explain it to me. a. Sp_max b. Auxr_1 c. states 4. when i used " SRF p0= 0x08" inside main function i get error. when i declare it globally its okay. is this the restriction that declaration with sfr must be outside the main. 5. can we use PUSH and POP command with any register or there are some speciific register with which it works. Thanks for help
1. what is the difference between symbol A and ACC used for accumulator. A1. The header file eg. REGS51.h has those special function register definitions and addresses. for example Regs51.h has sfr ACC = 0xE0; Now you can change that to just sfr A = 0XE0; if you want to, but then you would have a none statndard Regs file. 2. when i use (in assembly)PUSH A, i get error. PUSH ACC does not give me error. A2. SEE A1 above 3. in the debug environment i do not understand what does following register do or what does it stand for. pl explain it to me. a. Sp_max Aa1. Stack pointer Max b. Auxr_1 Aa2. Auxilliary reg 1 . See data sheet SFR definitions. This is a now 8051 standard sfr. c. states Ac1. States are the calculacalated at 6 states per 12 instruction cycles. This is part of the timing for instructions. 4. when i used " SRF p0= 0x08" inside main function i get error. when i declare it globally its okay. is this the restriction that declaration with sfr must be outside the main. A4. Declare all SFR's in REGs51.h 5. can we use PUSH and POP command with any register or there are some speciific register with which it works. 8051 ASM Instructions Push instruction allows you top push any "directly addressable" SFr onto the stack Thanks for help