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