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Fast CPU Select

A project log for OSI SD Card Operating System (OSISDOS)

Ohio Scientific / UK101 SD Card based Operating System under Multicomp FPGA Computer

land-boards.comland-boards.com 07/21/2020 at 11:160 Comments

Grant has a Fast CPU selection which allows the user to press the F1 key to toggle between Slow and Fast CPU choices. 

0 (power-up default) will set the CPU to 1MHz (standard UK101 speed). Pressing the F1 key will switch it to 12.5MHz ( ! ) and pressing F1 again will switch it back.

It patches the CEGMON location that does the timing loop for the repeat key. It's worth installing. A 12.5 MHz UK101/Ohio Scientific C1P is pretty cool.

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