/ Since clock must examine the parameters of our caller, we recover that / environment and transfer directly to it. The net effect is that it looks / like clock was called directly from the interrupt. .globl _vdh_clock, _clock _vdh_clock: mov r5,r2 mov -(r2),r4 mov -(r2),r3 mov -(r2),r2 mov r5,sp mov (sp)+,r5 bic $40,177776 jmp _clock