How does QNX get 838ns as the lowest clock tick and 55msec as the maximum
ticksize setting?
Please clarify,
Thanks,
NKR
The orginal PC clock was based on the US NTSC television color
system, with a color subcarrier at 3.579545MHz. Multiplied by 4, we get
14.31818MHz – the crystal used in the original PC. Divided by three,
4.772Mhz – the original PC CPU frequency. When this is divided by 4, we get
1.1931816Mhz, the period of which is 838nS. 838nS times 65536 is 54925.41
uSec (55mSec) – this is the range of the 16 bit 8253 PIT divisor (1-65536).
In other words, no good reason.
- Dave
“radha krishnan” <radha.nk@geind.ge.com> wrote in message
news:dkniie$2jn$1@inn.qnx.com…
How does QNX get 838ns as the lowest clock tick and 55msec as the maximum
ticksize setting?Please clarify,
Thanks,
NKR