Byte swapping apparatus for selectively reordering bytes of an N

Details Byte swapping apparatus for selectively reordering bytes of an N Byte swapping apparatus for selectively reordering bytes of an N

1990-03-28

1993-11-23

Harrell, Robert B.

Boots, shoes, and leggings

395800, 36492792, 36492793, 3649263, 3649392, 364DIG2, 3642393, 3642609, G06F 700, G06F 1338, G06F 1300

Patent

active

052652378

ABSTRACT:
A byte swapping circuit which selectively orders the bytes of a 16 or 32 bit word to enable proper transmission of data between an AT computer and a VMEbus. The byte swapping circuit generally includes first, second, third and fourth groups of buffers which are disposed in parallel along an internal bus of the circuit. The first group of buffers swaps the bytes of a word having bytes A, B, C and D into the order D, C, B and A. The second group of buffers transmits a word having bytes A, B, C and D in the same order without any byte swapping. The third group of buffers swaps the bytes A and B of a 16 bit word into the order B, A. The fourth group of buffers shifts the C and D bytes of a 32 bit word, which would normally occupy bit positions 16-31, into bit positions 0-15. A control register selectively enables one group of buffers at a time to effect the needed byte swapping.

REFERENCES:
patent: 4495598 (1985-01-01), Vahlstrom et al.
patent: 4931925 (1990-06-01), Utsumi et al.
patent: 4956809 (1990-09-01), George et al.
patent: 4959779 (1990-09-01), Weber et al.
patent: 4999808 (1991-03-01), Blahut et al.
patent: 5107415 (1992-04-01), Sato et al.
patent: 5132898 (1992-07-01), Sakamura et al.
Black, John, "A Few Words from the Editor Byte Ordering Problems: Don't Let Them Catch You by Surprise", VMEbus Systems, Mar.-Apr. 1987, pp. 31-36.
Morrisey, Shawn "Byte Numbering Differences: VMEbus and the CPU-386", Force Computers, Inc., Technical Note, TN-001, Jan. 16, 1987.

Affiliated with

Also associated with

Rating

Byte swapping apparatus for selectively reordering bytes of an N does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Byte swapping apparatus for selectively reordering bytes of an N, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Byte swapping apparatus for selectively reordering bytes of an N will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1856928