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The Diagnostic Disk detects a 2C type boot disk is required, but when I make it, it won boot up. Why?

April 26, 2017boot detects diagnostic disk type

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The Diagnostic Disk detects a 2C type boot disk is required, but when I make it, it won boot up. Why?

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If your old boot disk for OASIS was a 2.4 Boot Disk supplied by the School Technology Support Unit, the Diagnostic Disk may incorrectly determine the disk type to be 2C (IRQ 5, Port 340). It should really be a type 2E (IRQ 10, Port 340). Create a type 2E and it should work fine.