New memory SIMM 72 pins module [EDO]

Projects
1

I am beginner with KiCAD editor, but very advanced with all kind of editors for PC. i.eg. Rhinoceros, Unreal Engine, Doom Builder, Micrographx Image, Designer.
Now I want to finalize project of EDO-RAM memory for 72 pins connector. There are lot of memory modules on the market. Various kinds and sizes, even for 72 pins connector.
My project is 2x chips of 4x banks of 8MB x8bit organization. Chips are available on the market, then I need only PCB.
I want to finish this project with good and standard quality.
How to use KiCAD to create this?
First I must to create schematic. OK
Second is project which I must to know details about traces and pins width.
If somebody could take this all project or I must to finish this by myself.
I can’t add docs of memory chips yet, as new user.
ISSI IS42/45S83200J
Micron MT48LC32M8A2
ALLIANCE AS4C32M8SA

32M x 8 bit Synchronous DRAM

   8M x 8 x 4 Banks

total : 2x > 32MB x 8-bit >>> 64 MB RAM module 72 pins SIMM

2

I personally would draw the PCB with MS Word, simulate signal reality with the Unreal Engine, manufacture the single sided board and populate it with my new soldering iron from Home Depot and then realize what Rhinoceros I am.

2 Likes
3

I think you are making it more complicated than it needs to be . . .

4

We can help you with specific KiCad questions, if you want general electronics help there are more suitable forums.

You need to read and understand the data sheets for the components you are using, if that is a little beyond you right now you need to put in the effort to understand. Then you can think about the design.

1 Like
5

I marked #4 as ‘the solution’ because, well, it is.

6

Honestly if you’re after these 486 era memory modules it might cost you less in the end to buy them as NOS or OOS (pulls).

Or maybe some intrepid hardware hacker with too much spare time has published a working design on the Interwebs.

PS: Out of curiosity, I did a search on Github and there are these projects:

Not cheap though with the fingers.

7

I need exactly 72 pins SIMM module like this:

2 x [two chips on module] IS42/45S83200J :brand> ISSI
or
2 x [two chips on module] MT48LC32M8A2 :brand> Micron
or
2 x [two chips on module] AS4C32M8SA :brand> Alliance Memo.

These chips can be used as replacements, because have the same type and specifications. I found it, all are available as new on the market.
I can do schematic, because it is very simple, even with wright connection to the 72 pins connector.

Then I must to learn details about PCB of final module with good quality.

8

Ok good luck with learning KiCad. Start a new topic when you need to clarify something about how to go from schematic to layout and beyond.