Home made memory expansion.

Feek · 03-02-2011, 22:47

I went to my mums today and picked up an old computer of mine.

In it is a home built memory expansion card. It's a thing of beauty.

The front is just four chips in sockets, the back is where it all happens.

Take a look at this.

I built that. From scratch. I had a circuit diagram for it and just built from the circuit, if I remember correctly the three memory bugs are effectively paralleled up with some switching lines going up via a controller to the BUS connector.

Total capacity - 24Kb RAM.

Here it is fitted in the computer.

Even back then I was overclocking. There's a switch hanging out of the back which doubles the clock speed from 1MHz to 2MHz!

Those were the days, huh? Can you imagine building a memory expansion card for a computer nowadays.

03-02-2011, 22:47	#1
Feek ex SAS Join Date: Jun 2006 Location: JO01ou Posts: 10,062	Home made memory expansion. I went to my mums today and picked up an old computer of mine. In it is a home built memory expansion card. It's a thing of beauty. The front is just four chips in sockets, the back is where it all happens. Take a look at this. I built that. From scratch. I had a circuit diagram for it and just built from the circuit, if I remember correctly the three memory bugs are effectively paralleled up with some switching lines going up via a controller to the BUS connector. Total capacity - 24Kb RAM. Here it is fitted in the computer. Even back then I was overclocking. There's a switch hanging out of the back which doubles the clock speed from 1MHz to 2MHz! Those were the days, huh? Can you imagine building a memory expansion card for a computer nowadays. __________________ Last edited by Feek; 03-02-2011 at 22:54.