@mrjaredbeta the other day i was trying some simple maths with the values of command 0x13 confirmed to be valid, and i rewrote the list in wiki, basically we have only 3 values:
Code:
0x9bdc (39900) - Used by "Phantasy Star Universe" (official config for SLPM-66031), "WRC II Extreme", and "Burnout Dominator"
0xf960 (63840) - Used by "Jak X: Combat Racing" (official config for SCUS-97429), and "Netsu Chu! Pro Yakyuu 2004"
0x1d394 (119700) - Used by "Jissen Pachi-Slot Hisshouhou! Kemono-Oh" (official config for SLPS-20131)
I noticed they are proportional, so i just tryed with this web tool to calculate the
Greatest Common Divisor of them, that is 7980
This doesnt gives a clear hint of what means the meassure unit used by this command 0x13, but at least it allows to generate other values that are proportional, in short... the valid values we found are the result of:
7980*5 = 39900
7980*8 = 63840
7980*15 = 119700
The interesting thing of this experiment would be to find the "multiplyers" was following some progression too adjusted to something else... you know... instead of multiplying by 5, 8, and 10 it would be a lot more helpful to find the multiplyers was 5, 10, 15, 20 and so on... or 4, 8, 16, 32, and so on
But what we have is 5, 8, 15, so by now there is a lot of other posible values follwing the rules we know so far

The list is a bit long, but all this values are candidates to work with ps2_netemu command 0x13
7980*1 = 7980
7980*2 = 15960
7980*3 = 23940
7980*4 = 31920
7980*5 = 39900 <--- confirmed valid
7980*6 = 47880
7980*7 = 55860
7980*8 = 63840 <--- confirmed valid
7980*9 = 71820
7980*10 = 79800
7980*11 = 87780
7980*12 = 95760
7980*13 = 103740
7980*14 = 111720
7980*15 = 119700 <--- confirmed valid