| David Smith 04/12/06 03:06 Read: 567 times Nottingham Uk |
#114140 - Doh! Responding to: Kai Klaas's previous message |
Sorry Kai, I've never used the external addressing of an 805x, so I don't know if the page addressing is connected with P2. I was thinking specifically of the Siemens C515A I occasionally use. It has 1k (4 pages) of internal XRAM - page addressed by 'XPAGE' - a SFR at 91h.
And Erik, XPAGE does initialise to 00h. Unfortunately, this DISABLES the internal XRAM! The valid page numbers are F8h to FBh. Just checked Kai, upper address byte can be written to P2 or XPAGE. Dave |
| Topic | Author | Date |
| unclarity with movx instruction | Markus Kammersberger | 04/10/06 09:32 |
| Speed up | Kai Klaas | 04/10/06 09:39 |
| Mistake | Kai Klaas | 04/10/06 09:48 |
| Clarity prevails! | Andy Neil | 04/10/06 09:48 |
| Quicker? | Kai Klaas | 04/10/06 09:54 |
| Quicker! | Andy Neil | 04/10/06 10:11 |
| assumption... | Andy Neil | 04/10/06 10:19 |
| Finally, you are right! | Kai Klaas | 04/10/06 10:21 |
| MOVX @Ri | Jan Waclawek | 04/10/06 09:52 |
| since you did not have the time to find | Erik Malund | 04/10/06 10:01 |
| wrong answer | Erik Malund | 04/10/06 10:03 |
| Typo | Abhishek Singh | 04/10/06 11:03 |
| thanks Erik for the correction | Jan Waclawek | 04/10/06 14:14 |
| It is set to P0 | Neil Kurzman | 04/10/06 10:01 |
| wrong again | Erik Malund | 04/10/06 10:04 |
| Yes I am | Neil Kurzman | 04/10/06 11:55 |
| an example | Jan Waclawek | 04/10/06 14:21 |
| Internal XRAM | David Smith | 04/11/06 14:29 |
| not really | Erik Malund | 04/11/06 14:38 |
| Ports' SFR are set to 1 | Kai Klaas | 04/11/06 19:54 |
not a port, a "page SFR" | Erik Malund | 04/12/06 05:59 |
| P2? | Kai Klaas | 04/11/06 19:49 |
| Doh! | David Smith | 04/12/06 03:06 |
| which derivative | Oleg Sergeev | 04/11/06 00:06 |
| do not allow? | Jan Waclawek | 04/11/06 01:30 |
| AT89S8252 | Oleg Sergeev | 04/11/06 23:58 |
| Aaaaah, so. Thanks. | Jan Waclawek | 04/12/06 00:49 |
| Tanks | Markus Kammersberger | 04/11/06 01:43 |