===== 12 PLC F15 POLL COSTS | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 00000480
GP0(00h) stores (a NOP, gpu/i-o-ports-dma-channels-commands-vram.txt:33) and poll turns
(q25; console 12.4 a GP0 store, poll 108, timer poll turn 112).
50 turns: nothing 205; 64 GP0 sw back to back 6453
100 turns: nothing 355; 8 GP0 sw, a NOP after each 1955; 16 GP0 sw, a NOP after each 3555; 32 GP0 sw, a NOP after each 6760
100 turns: GPUSTAT lw, nop, and bit 28, beq not taken, nop, nop 1357
100 turns: timer 2 lhu, nop, bne taken over one, nop 1255
Done.