| ??? 01/04/08 16:36 Read: times |
#149049 - that's no shame Responding to: ???'s previous message |
Philippe Loussouarn said:
I disassemble the HEX file for a better understanding (shame on me). There is no shame on this. I see it as a good way of learning. Others might disagree, though - I don't care... :-) Your description is roughly right, although in some details it's imprecise... For example, there is no need to rewrite the longjump instruction in the FLASH, in fact; there are 3 zeros written to the first 3 positions "manually" - no jump existed there previously, the whole sector was erased. Philippe Loussouarn said:
Little curiosity, which (non documented) register corresponds to address 21H ? There is no such. All SFRs are located above 80h. Can you post here the disassembled lines which make you believe there is any register at that address? JW |
| Topic | Author | Date |
| P89V51RC2_V03_UPD_ISP.HEX Question | 01/01/70 00:00 | |
| yes, this is an _upgrader_ | 01/01/70 00:00 | |
| Flash Mapping in P89v51 | 01/01/70 00:00 | |
| P89V firmware update: to be continue... | 01/01/70 00:00 | |
| that's no shame | 01/01/70 00:00 | |
| P89V51 firmware upgrade | 01/01/70 00:00 | |
| it goes like this: | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |