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Quote from: technix on September 06, 2017, 06:56:52 pm This is about a 8051 single board computer idea. If all boot strategy failed it enters interactive mode BASIC.
![iar 8051 crash iar 8051 crash](https://i.ytimg.com/vi/FykMIrKIFlA/maxresdefault.jpg)
Then it checks if a valid BASIC program exists in EEPROM (whose header is always invalid as 8051 machine code) and executes it. If so it asserts P1.4 low and the supervisor would reset the 8051 to boot from the EEPROM. Then it checks if the first bytes of the EEPROM corresponds to a valid 8051 machine language program. The BASIC checks if P1.4 is low, if so it enters interactive mode. The 8051 always boots from BASIC when powered.
Iar 8051 crash serial#
How do I tell if the EEPROM contains a valid machine language program? Here is the proposed boot sequence, with the USB to Serial chip ATmega16U2 also being the supervisor. The external bus interface is connected into a Von Neumann bus (that is, external code and xdata is the same bus.) The system can either execute the binary code stored in the external EEPROM, or boot into BASIC stored in the internal Flash to interpret the BASIC code in the external EEPROM.
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This is about a 8051 single board computer idea.