Boots – shoes – and leggings
Patent
1977-09-26
1979-05-22
Springborn, Harvey E.
Boots, shoes, and leggings
G06F 300
Patent
active
041562771
ABSTRACT:
An I/O data interface provides an access mechanism without requiring additional lines on the bus for device address presentation for the request of access. Each peripheral device can detect an invitation-to-request access signal and in response thereto, to supply its own device address on the bus in a serial manner with any other device requesting access. Respective device addresses are assigned to respective peripheral devices in accordance with their priority, the higher priority devices having a higher address and the lower priority devices having a lower address. If any address bit of a particular device is lower than an address bit on the bus, the device ceases to supply its address bits with the result that only the requesting device having the larger device address will be selected for communication over the I/O bus.
REFERENCES:
patent: 3723971 (1973-03-01), Betts et al.
patent: 3796994 (1974-03-01), Nuss, Jr.
patent: 3985962 (1976-10-01), Jones et al.
patent: 3996561 (1976-12-01), Kowal et al.
"Rapid Polling for Loops or Multidrop Systems with Priorities"; Piatkowski et. al.-IBM T.D.B. vol. 16, No. 1, Jun. 1973, pp. 306-307.
Parker Marshall M.
Seitz Charles L.
Burroughs Corporation
Peterson Kevin R.
Springborn Harvey E.
Young Mervyn L.
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