Complex digital ICs visual simulation?

[Michael]

Hi there!

If I e.g. place a RAM component into MultiSim, will it simulate
it? I.e. can I (using switches and hex displays) write on the
RAM and then read back? Is the IC really simulated, or it's just
a graphic symbol?

If so, is there any other program that will do it?

Thanks!
--
Mike

 

[Kevin Aylward]

Michael wrote:

Hi Kevin Aylward (kevin@anasoft.co.uk), you wrote:

If I e.g. place a RAM component into MultiSim, will it simulate
it? I.e. can I (using switches and hex displays) write on the
RAM and then read back? Is the IC really simulated, or it's just
a graphic symbol?

If so, is there any other program that will do it?

In principle yes. This depend on if you can figure out how to drive
multisim.

[snip]

Thanks for your reply. I managed to enter data into the simulated
RAM via switches, and read it back correctly using hex displays.

But, ain't it possible to directly load a binary file into the
simulated RAM (or EPROM) to initialize its values?

I'd like to design a very simple CPU, and having to load the program
each time via switches is, to say the very least, tedious.

The unmodified XSpice engine does not have this feature, you can only
set all bits to a 0 or 1 as an initial condition. I don't know if
MultiSim has added to this. There is a d_source, digital source
function, that allows generation of an arbitrary input via a file, which
theoretically could be used the clock in the ram data.

For digital, design, I would still suggest you have a look at
http://www.beigebag.com/ , tell Jon Englebert, I sent you I am
reasonably sure they will be much more supportive than EWB.

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.