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Group Code Recording

(storage)Group Code Recording - (GCR) A recording method used for 6250 BPI magnetic tapes.

GCR typically uses a group of five bits of code to represent four bits of data, where the encoding ensures no more than two or three zeros occur in a row, and no more than eight or so ones occur in a row, where zeros represent an absense of magnetic change.

GCR is also used on Commodore Business Machines diskette drives; the 4040, 8050, 154x, 157x and 158x series of 5.25" and 3.5" low and high density diskette drives used with 8-bit home computers circa 1977 to 1992. Also used on Amiga internal and external drives.

Compare NRZI, PE.
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groundskeeper
groundsman
groundspeed
groundswell
groundwater level
Groundwork
Group
Group 3
Group 4
group A
group AB
group action
group Amentiferae
group B
group captain
group Centrospermae
-- Group Code Recording --
group discussion
group dynamics
group identifier
group insurance
group O
group participation
group practice
group psychotherapy
group Pteridospermae
group Pteridospermaphyta
Group Separator
group theory
group therapy
Group-Sweeping Scheduling
grouped
Grouped columns
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