Cleaning the IBM PS/2 Model 50Z (before and after)

The model 50 was among the first four PS/2 machines IBM announced in 1987, and it is the only 286 desktop Microchannel machine that was ever made by IBM. The 286 CPU is clocked at 10 MHz, not fast compared to what competitors offered at the time, but this frequency gave the bus its standard operating frequency, and the bus itself was definitely a performance enhancement compared to the old ISA bus. The Model 50 is one of the few PS/2's where memory cards are not slower than on-board memory...