| ??? 07/10/09 10:54 Read: times |
#166992 - Direct method, Indirect Method or C compiler ? Responding to: ???'s previous message |
if you simply use the instruction
MOV 87H,#23H to store the number #23H at place 87H then the value of #23H will be stored on the SFR at 87h which is PCON, because this is the direct method. 
in order to write a value to internal RAM at 87H MOV R0, #87H MOV @R0, #23H these are stated in bible as Erik said http://www.8052.com/forum/read/166988 Beside the Assembler you may you a C Compiler that take cares of these things and set up them accordingly. SDCC http://sdcc.sourceforge.net/ or Keil or IAR or ... |
| Topic | Author | Date |
| Stack Pointer and available RAM | 01/01/70 00:00 | |
| "Internal" RAM - basics | 01/01/70 00:00 | |
| some confusion with your links | 01/01/70 00:00 | |
| Follow: can I use 08H through 2FH for general purpose RAM | 01/01/70 00:00 | |
| 08 thru 2F as additional RAM | 01/01/70 00:00 | |
| use the indirect method for upper RAM, take care of Stack | 01/01/70 00:00 | |
| the limits for simple storage | 01/01/70 00:00 | |
| Direct method, Indirect Method or C compiler ? | 01/01/70 00:00 | |
| READ "THE BIBLE" | 01/01/70 00:00 | |
| Tell us which exact 80c51 you are using | 01/01/70 00:00 | |
| Really?? | 01/01/70 00:00 | |
| a long time ago | 01/01/70 00:00 | |
| Another option for usage of Register Banks | 01/01/70 00:00 | |
| instead of getting it piecemeal | 01/01/70 00:00 | |
| I think therefore I ask | 01/01/70 00:00 | |
| WRONG | 01/01/70 00:00 | |
| according to the PDF | 01/01/70 00:00 | |
| Program in Assembler?? | 01/01/70 00:00 | |
assembler only | 01/01/70 00:00 |