Given below is the debug o/p from usb-uhci,strangely it seems to skip the frames after 118 it jumps to 145 .. similar is the case with frame 0 , it doesn't load frame 0 rather jumps to frame 1.The guest is minix 3.1.5 and the o/p was generated from the driver under development,i have notice the same behavior with NetBSD
uhci: new frame #117 uhci: processing frame 117 addr 0x125251d4 uhci: TD 0x11cc02a0 load. link 0x125272a2 ctrl 0x2000000 token 0x0 qh 0x0 uhci: TD 0x11cc02a0 skip. link 0x125272a2 ctrl 0x2000000 token 0x0 qh 0x0 uhci: QH 0x125272a2 load. link 0x12529002 elink 0x1 uhci: QH 0x12529002 load. link 0x12528002 elink 0x1 uhci: QH 0x12528002 load. link 0x12526002 elink 0x1 uhci: QH 0x12526002 load. link 0x1 elink 0x11cc1000 uhci: TD 0x11cc1000 load. link 0x1 ctrl 0x0 token 0x0 qh 0x12526002 uhci: TD 0x11cc1000 skip. link 0x1 ctrl 0x0 token 0x0 qh 0x12526002 uhci: new frame #118 uhci: processing frame 118 addr 0x125251d8 uhci: TD 0x11cc02c0 load. link 0x125272c2 ctrl 0x2000000 token 0x0 qh 0x0 uhci: TD 0x11cc02c0 skip. link 0x125272c2 ctrl 0x2000000 token 0x0 qh 0x0 uhci: QH 0x125272c2 load. link 0x12529002 elink 0x1 uhci: new frame #145 uhci: processing frame 145 addr 0x12525244 uhci: TD 0x11cc0220 load. link 0x12527222 ctrl 0x2000000 token 0x0 qh 0x0 uhci: TD 0x11cc0220 skip. link 0x12527222 ctrl 0x2000000 token 0x0 qh 0x0 uhci: QH 0x12527222 load. link 0x12529002 elink 0x1 uhci: QH 0x12529002 load. link 0x12528002 elink 0x1 uhci: QH 0x12528002 load. link 0x12526002 elink 0x1 uhci: QH 0x12526002 load. link 0x1 elink 0x11cc1000 uhci: TD 0x11cc1000 load. link 0x1 ctrl 0x0 token 0x0 qh 0x12526002 uhci: TD 0x11cc1000 skip. link 0x1 ctrl 0x0 token 0x0 qh 0x12526002 uhci: new frame #146 uhci: processing frame 146 addr 0x12525248