Search found 27 matches

by Prof_Magnesium
Thu May 10, 2018 12:19 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

Starting to simulate the 8080 microprocessor: the 8224 clock
IC_8224.CircuitProject
(102.77 KiB) Downloaded 1257 times
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by Prof_Magnesium
Wed May 09, 2018 1:10 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

And finally, dynamic RAM:
IC_4116.CircuitProject
(53.04 KiB) Downloaded 1276 times
by Prof_Magnesium
Wed May 09, 2018 1:09 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

Static RAM:
IC_2111.CircuitProject
(43.75 KiB) Downloaded 1265 times
by Prof_Magnesium
Wed May 09, 2018 1:08 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

IC_2364.CircuitProject
(40.07 KiB) Downloaded 1290 times
by Prof_Magnesium
Wed May 09, 2018 1:08 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

Continuing:
The attachment IC_2716.CircuitProject is no longer available
IC_2716.CircuitProject
(29.33 KiB) Downloaded 1233 times
by Prof_Magnesium
Wed May 09, 2018 1:06 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

I put one file at a time because it doesn't work when I put more than one!
IC_S288.CircuitProject
(19.09 KiB) Downloaded 1226 times
by Prof_Magnesium
Wed May 09, 2018 1:05 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

The attachment IC_S287.CircuitProject is no longer available
IC_S287.CircuitProject
(18.3 KiB) Downloaded 1286 times
by Prof_Magnesium
Wed May 09, 2018 1:04 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

Going on: one more 74xxx. I should stop now because I have now all the TTL IC I needs to simulate my 8-bit computer. IC74170.CircuitProject

I started to build RAM and ROM. To load the ROM I was surprised by the fact that the data must be stored in binary files. But it was not very difficult to ...
by Prof_Magnesium
Sun May 06, 2018 5:43 am
Forum: Lounge
Topic: 8bit computer
Replies: 8
Views: 59391

Re: 8bit computer

Thank you very much for these advices. I started to work on this 8-bit computer project and I have already published some CIs I have made, in Circuit Talk "My first circuit: 74155". Between them, there are the 74122 and 74123 on-shots. I also looked at ROM and RAM. I have found it is very easy to ...
by Prof_Magnesium
Sat May 05, 2018 9:06 pm
Forum: Circuit Talk
Topic: My first circuit: 74155
Replies: 25
Views: 40746

Re: My first circuit: 74155

I tried to simulate the 74122 and 74123 one-shot CIs. I used the ideia of counting a number of periods of the clock. My project has an 8-bit counter which resets a D flip-flop when the count is equal to the preset value. This value is informed with two nibbles (2 x 4 bits) specific to each one-shot ...