QEMU time problem

[Nessphoro]

Hello fellow developers,

I've encountered a problem while getting time from CMOS in QEMU

The problem is converting BCD time to plain binary.

(bcd >> 1) + (bcd >> 3) + (bcd & 0xf), this doesn't work , optimized version doesn't work either.

Any help?

[xenos]

The problem is not related to QEMU, but to your BCD conversion formula. As pointed out in this post, it should be

((bcd & 0xF0) >> 1) + ((bcd & 0xF0) >> 3) + (bcd & 0x0F)

[Nessphoro]

That didn't work either

[shikhin]

You say it doesn't work. Mind describing how it doesn't work?

I am not an expert on this, but if the problem is that the time showing up isn't correct, are you even sure that QEMU has the right time in the CMOS?

[Nessphoro]

Well if I display the time, seconds for example, as hexademical it shows the right time, when I use the code above it just shows some well, crap, pardon my French

[xenos]

This could have one of these reasons:

• The input data is not BCD coded.
• The number you get out of this formula is wrong (unlikely).
• The printf function for decimal numbers does not work properly.

Have you checked step by step whether any of these applies to your problem?

[Nessphoro]

Print for numbers works, but I think that the format is not BCD coded, because the formula produces the wrong output >_>

[Love4Boobies]

This is a QEMU problem and has been fixed in version 0.14.