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Osborne 1 <--> PC over RS232

I would like to thank the people who have kindly helped me in this thread; particularly ldkraemer (Larry) and phogren, who sent me the floppies with the needed software.

Thank you guys, this forum is terrific (as usual)!
 
Hi,

Does anyone know how to boot an Osborne 1 via the serial port, as is apparently possible in BIOS v 1.3 (but was removed in v 1.4)? This supposedly doesn't require any software on a disk in either floppy drive, just initiating the process on the O1 via the keyboard in response to the power-on message saying to insert a disk into drive A and pressing Return. I've been looking for key combinations that can drop the O1 into a monitor mode, but the only thing I've found is how to boot from drive B (control-" or control-#, IIRC). The v 1.3 ROM assembly listing in the appendix in the O1 technical reference manual doesn't seem to have any comments about this capability.

Thanks,
Jim
 
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