| ??? 04/04/07 15:08 Read: times |
#136602 - You may eventually find ... Responding to: ???'s previous message |
That the simplest, easiest, way to accomplish the goal of getting the EEPROM programmed is to use the serial port, just as the various manufacturers encourage us to do with ISP-capable parts.
You can map the SRAM into both code and data space via an AND gate combining nRD and nPSEN and qualified with A15, which, in this case, best should be in the region above the EEPROM. If you load the code intended to wind up in the EEPROM into the RAM, you can then program a sector or two, and then go back and fetch more code from the PC host. There's an entire universe of ways to get this done. So ... how did you get your EEPROM programmed in order to verify that it runs? What "signs of life" do you see? How do you "see" them? RE |
| Topic | Author | Date |
| My board works! | 01/01/70 00:00 | |
| You may eventually find ... | 01/01/70 00:00 | |
| answer | 01/01/70 00:00 | |
| How'd you do it? | 01/01/70 00:00 | |
| i knew it | 01/01/70 00:00 | |
| Are you sure you aren\'t looking in the wrong place | 01/01/70 00:00 | |
| . | 01/01/70 00:00 | |
| Be sure to adhere to standard syntax | 01/01/70 00:00 | |
| free assembler | 01/01/70 00:00 | |
10 lines of code to transfer a string | 01/01/70 00:00 | |
| Congrats! | 01/01/70 00:00 |