Sunnyvale, California-based Appian Technology Inc is shipping its P928 FAST Local Bus Peripheral Interface chip: it links a local 80486 CPU bus to AT peripherals and is said to enable designers to overcome the performance bottlenecked by an ageing AT bus structure; the P928 provides a 32-bit interface to the CPU bus and supports double-word read and write operations through internal byte conversion and control logic; the device implements zero wait-state posted write cycles enabling concurrent CPU-memory and peripheral operation; speculative read-ahead on graphics data is provided and fast AT cycles from the P928 are programmable in both wait-state and recovery time; the device permits both the P928 and AT bus to reside together and each can be individually enabled; the P928 chipcomes in a 160-pin plastic quad at $18.83 in quantities of 5,000.
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