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Annotation of 42BSD/sys/mdec/tmtoggle.s, revision 1.1.1.1

1.1       root        1: /*     tmtoggle.s      6.1     83/07/29        */
                      2: 
                      3: /*
                      4:  * Prototype toggle in bootstrap code for tm type tapes.
                      5:  * If on anything but a 780 with the drive on uba0
                      6:  * this will have to be repaired by patching uba and umem.
                      7:  */
                      8: begin:
                      9:        movl    uba,r1
                     10:        movl    $0x80200000,0x800(r1)
                     11:        clrl    0x804(r1)
                     12:        movl    umem,r2
                     13:        bisl2   $0172520,r2
                     14:        mnegw   $512,4(r2)
                     15:        clrw    6(r2)
                     16:        movw    $03,2(r2)
                     17:        halt
                     18:        .align  2
                     19: uba:   .long   0x20006000
                     20: umem:  .long   0x2013e000

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