Cobra and Muskie
In 1995 IBM released the Cobra, or A10 processor, the first implementation of PowerPC AS, for AS/400 systems. It was a single-chip processor running at 50-77 MHz. It was designed with a semi-custom methodology, as a consequence of time-to-market constraints. The die contains 4.7 million transistors and measures 14.6 mm by 14.6 mm (213 mm2). It was fabricated by IBM in their CMOS 5L process, a 0.5 µm, four-layer-metal CMOS process. It used a 3.0 V power supply and dissipated 17.7 W maximum, 13.4 W minimum at 77 MHz. It was packaged in a 625-contact ceramic ball grid array (CBGA) that measured 32 mm by 32 mm.
In 1996 IBM released the high-end, 4-way SMP, multi-chip version called Muskie, A25 or A30 in AS/400 systems. It ran at 125-154 MHz. It was manufactured on a BiCMOS fabrication process.
These processors were only used in AS/400 machines.
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