for access to input/output bus

Introduced: January 1985

Full Title

Full titles differ between systems:

IPC:

Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units > Handling requests for interconnection or transfer > for access to input/output bus

CPC:

Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units (interface circuits for specific input/output devices G06F3/00 ; multiprocessor systems G06F15/16 ) > Handling requests for interconnection or transfer > for access to input/output bus

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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G06F 13/22 using successive scanning, e.g. polling (G06F13/24 takes precedence) since 1985 +1 CPC IPC+CPC Available in IPC and CPC
G06F 13/24 using interrupt (G06F13/32 takes precedence) since 1985 IPC+CPC Available in IPC and CPC
G06F 13/28 using burst mode transfer, e.g. direct memory access , cycle steal (G06F13/32 takes precedence) since 1985 +3 CPC IPC+CPC Available in IPC and CPC
G06F 13/32 using combination of interrupt and burst mode transfer since 1985 IPC+CPC Available in IPC and CPC