Diagnosing M7104, M7105, M7106
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by Bill Degnan - 02/15/2010 16:43 |
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I am not sure which drive controller is bad. [NOTE: I learned later that none were bad.]
- system does not reset the drives when SW switch is moved [NOTE: I learned later that the bootstrap card for the drives is bad] - does not seem to reset the flag that indicates it's done with the read of the drive. URL to manuals http://www.pdp12.org/pdp...rawings/modules/m7.html M7104 RK05 Disk Controller 1 (data buffer register and status) M7105 RK05 Disk Controller 2 (major registers) M7106 RK05 Disk Controller 3 (control module) schematics m7104 m7105 m7106 Reply |
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