Hello, I used proteus 8 for a project. I made a 8 bit ALU using 4 bit 74LS 181N. I wanted to display two digits. Then I had to convert my binary output to BCD. I tried to use "185" for this task I readed the sheet and made it "8 bit" as shown on its paper. But that is not simulating anything. If I directly put that again same result. I readed that proteus 8 has no longer has support for that. I do not know if that is true. What can I use instead of that ?

 

74185 is just a ROM. You can use an EPROM, programmed with an appropriate table, to replace it.

Or you can design a circuit to do the conversion. One I designed took around 20 gates for 4 bits.

Is this a school project?

 

I find proteus simulation more trouble than it's worth, unless it's something really simple and only digital without PWM and higher frequency sims going on... it seems like it's too much and mine crashes when I try to simulate something useful... or boggs down until it crashes...

I believe he means this chip: