Disk Interface Apple Ii Code To Read

Disk Interface Apple Ii Code To Read

I also have written code to read every sector on a DOS 3.3 disk and verify checksum.

One freshly formatted disk is completely scanned in 15 to 20 seconds, without error On.

Next step is to write retry and error handling code and retry a complete scan of that well used disk.

Made lots of progress over the holiday weekend.

The automatic retry mechanism is largely coded up, but disabled.

So far the power supply section is holding up well, something Ill keep monitoring.

Once the write function is completed, the last major work that needs to be done in the RWTS system is the format function.

My existing test vehicle uses a UART based interface, which could.

I still have room for about 24 more instructions I have debugged.

Future Updates Will Be Posted On My Forum Pages - Go There For Updates The Proof of Principal Board Besides a small number of resistor and capacators, components on this board consist of: 6 pin header AVR flash programming interface 20 pin header DISK interface DB-9 RS232 communications - to be replaced by USB in final design max232 IC generates RS232 level signals - will be eliminated in USB version of this design power jack unregulated power from 12volt 1 AMP DC wall wart 7812 with heatsink provides regulated 12 volt supply from unregulated 12volt DC wall wart input 7805 provides regulated 5 volt supply from unregulated 12volt DC wall wart input 7662 IC converts regulated 12 volt supply to -12 volts AVR micro-controller All.