Re: [avr-chat] Which simulator to use?

[Joerg Wunsch]

Kitts <address@hidden> wrote:

> I tried VMLab on a windows machine at work. It seemed nice
> considering that an important need for me is the serial port
> terminal. Yet it was ridiculously slow processing at about 1ms
> processor time in 1 minute real world time on a 3GHz P4 machine!
> This means there appears one character every minute when set at 9600
> baud!

That's ridiculously slow, indeed.  Besides simulavr (I have yet to try
simulavrxx myself), I also occasionally run VMlab on my FreeBSD
machine (a 900 MHz Athlon CPU) under the wine emulator, and while it's
not really quite fast, the tty output comes out ``quite normally'',
i.e. much more than one char per second.  When considering its speed,
do also consider that they're performing a lot of validity checks on
your application, so they catch virtually any situation where you are
trying to access undefined memory areas, undefined bits in a register
etc.  I guess that's the real value VMlab offers, but naturally, it's
a tradeoff wrt. simulation speed.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)