External boot information loading of a personal computer

Details External boot information loading of a personal computer External boot information loading of a personal computer

1990-05-18

1994-06-28

Shaw, Gareth D.

Boots, shoes, and leggings

364DIG2, 3649404, 3649408, 36494081, 3649752, 3649751, G06F 9445

Patent

active

053255291

ABSTRACT:
A computer system which can receive boot information over a parallel or serial port. The ports are inspected for activity prior to attempting to boot from a floppy or hard disk. If there is activity on the port the sequence being received is read and compared to a predetermined identification sequence. If a match is made, an acknowledgement character is transmitted. A communication sequence commences to transfer the boot information over the link. After the transfer is complete, the boot information is executed. The serial transfer utilizes the conventional serial lines, while the parallel transfer is performed a nibble at a time. This nibble mode allows use of only outputs to inputs to avoid dual source driving problems.

REFERENCES:
patent: 5032989 (1991-07-01), Tornetta
patent: 5142680 (1982-08-01), Ottman et al.
patent: 5146568 (1992-09-01), Flaherty et al.
Dvorak, John C. "Dvorak's Guide to PC Telecomm." 1990, pp. 425-438.
Honig, David, Hoover, Kenton Desktop Communications, 1990, pp. 152-185.

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