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HEAD
BSD 4_1_snap development
[unix-history]
/
sys
/
mdec
/
tmtoggle.s
/*
* Prototype toggle in bootstrap code for tm type tapes.
* If on anything but a 780 with the drive on uba0
* this will have to be repaired by patching uba and umem.
*/
begin:
movl uba,r1
movl $0x80200000,0x800(r1)
clrl 0x804(r1)
movl umem,r2
bisl2 $0172520,r2
mnegw $512,4(r2)
clrw 6(r2)
movw $03,2(r2)
halt
.align 2
uba: .long 0x20006000
umem: .long 0x2013e000