IBM 3033

IBM 3033

The 3033 features a machine cycle time of 60 ns. It has a cache size of 64 KB. Initially the main storage was 4, 6, or 8 MB; later on this was expanded on some of the models to 8, 12 or 16 MB. Two Channel Directors are standard, with a third one available as an option. The third Director can only have four channels, because in 370 mode a system has max 16 channels. The third Director is available either with four block multiplexer channels or one byte multiplexer and three block multiplexers. Later on, the optional feature Data Streaming was added; it allowed the first block multiplexer channel in each Director to operate at 3 MB per second. Two optional channel-to-channel adapters (CTCA) are available. At announcement the monthly lease price for a minimally configured 3033 processor (without peripherals) was $70,400. The 3033 is supported by MVS, OS/VS2 SVS, OS/VS1, VM/370, and ACP.