7640c87195
time ago appears to be based not on the typical 1.8432MHz clock, or the other more typical multiple of 8 of this (14.7456MHz), but instead it appears to be 1/2 the PCI clock rate or 16.50000MHz. I'm not 100% sure that this is right, but since I did the original entry, I'm going to go ahead and modify it. With the 14.7456MHz value, I was getting bits that were ~7.3us instead of ~8.6us like they are supposed to be. My measuring gear for today is a stupid handheld scope with two signficant digits. So I don't know if it is 33.000000/2 MHz or some other value close to 16.5MHz, but 16.5MHz works well enough for me to use a couple of different devices at 115200 baud, and is a nice even multiple of a well known clock frequency... |
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| .. | ||
| puc_ebus.c | ||
| puc_pccard.c | ||
| puc_pci.c | ||
| puc_sbus.c | ||
| puc.c | ||
| pucdata.c | ||
| pucvar.h | ||