Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.misc > #7900 > unrolled thread

68000 Linux on a solderless breadboard

Back to article view | Back to comp.misc

Contents

  68000 Linux on a solderless breadboard RS Wood  <rsw@therandymon.com> - 2015-06-14 05:41 +0000
    Re: 68000 Linux on a solderless breadboard Sylvia Else <sylvia@not.at.this.address> - 2015-06-14 22:45 +1000
      Re: 68000 Linux on a solderless breadboard Michael Black <et472@ncf.ca> - 2015-06-14 10:46 -0400
        Re: 68000 Linux on a solderless breadboard Andy Burns <usenet.feb2014@adslpipe.co.uk> - 2015-06-14 16:54 +0100

#7900 — 68000 Linux on a solderless breadboard

From the «bring your own butter and jam» department:
Title: 68 Katy – 68000 Linux on a Solderless Breadboard
Author:
Date: Sat, 13 Jun 2015 17:43:49 -0400
Link: http://www.bigmessowires.com/2014/11/17/68-katy-68000-linux-on-a-solderless-breadboard

Comments[1]

Links:
[1]: https://news.ycombinator.com/item?id=9712793 (link)


--
Posting to comp.misc, sci.misc, and misc.news.internet.discuss

[toc] | [next] | [standalone]

#7905

On 14/06/2015 3:41 PM, RS Wood wrote:
>  From the «bring your own butter and jam» department:
> Title: 68 Katy – 68000 Linux on a Solderless Breadboard
> Author:
> Date: Sat, 13 Jun 2015 17:43:49 -0400
> Link: http://www.bigmessowires.com/2014/11/17/68-katy-68000-linux-on-a-solderless-breadboard
>
> Comments[1]
>
> Links:
> [1]: https://news.ycombinator.com/item?id=9712793 (link)
>
>
> --
> Posting to comp.misc, sci.misc, and misc.news.internet.discuss
>

Though some things plugged into the breadboard have solder on them. In 
extremis, one could have the entire thing on a soldered PCB, and just 
have the power supply go into the breadboard, so it's only a matter of 
degree.

All power to him though - I've never managed to get anything like that 
many breadboard connections to work at the same time. My limit's 
probably about 10, and that's if I'm lucky.

Sylvia.

[toc] | [prev] | [next] | [standalone]

#7907

[Multipart message — attachments visible in raw view] — view raw

On Sun, 14 Jun 2015, Sylvia Else wrote:

> On 14/06/2015 3:41 PM, RS Wood wrote:
>>  From the «bring your own butter and jam» department:
>> Title: 68 Katy – 68000 Linux on a Solderless Breadboard
>> Author:
>> Date: Sat, 13 Jun 2015 17:43:49 -0400
>> Link: 
>> http://www.bigmessowires.com/2014/11/17/68-katy-68000-linux-on-a-solderless-breadboard
>> 
>> Comments[1]
>> 
>> Links:
>> [1]: https://news.ycombinator.com/item?id=9712793 (link)
>> 
>> 
>> --
>> Posting to comp.misc, sci.misc, and misc.news.internet.discuss
>> 
>
> Though some things plugged into the breadboard have solder on them. In 
> extremis, one could have the entire thing on a soldered PCB, and just have 
> the power supply go into the breadboard, so it's only a matter of degree.
>
But some components don't fit the breadboard (though with an all digital 
circuit like a computer, that's less likely), so you'd often have to solde 
wires to switches and potentiometers so they could be connected to the 
breadboard.

> All power to him though - I've never managed to get anything like that many 
> breadboard connections to work at the same time. My limit's probably about 
> 10, and that's if I'm lucky.
>
One interesting thing is that it's now simpler.

In the old days, you'd either have to live with a small amount of RAM, or 
do endless repetitive wiring to get a lot of RAM.

Now you can just dig some cache RAM off a motherboard (though I guess 
those are now getting far enough in the past that they may be hard to 
find), and a single IC will give you a nice chunk of RAM to begin with.

There was a Dr. Dobb's book about the 68000, and it collected various 
articles about the CPU, some old, some I think written for the book.  It 
included an article about bootstrapping the 68000, so you didn't need a 
fancy front panel or a monitor in ROM before you could start.  So you'd 
jam a NOP onto the data bus, which would advance the address lines, so you 
could load data into RAM.  The same basic oncept had been shown 
previously, Byte definitely ran an article about doing the same thing with 
the 8085, and in retrospect, this is the idea used by Don Lancaster's 
"Cheap Video Cookbook" where he adds a display to a CPU without adding a 
whole lot of hardware.

   Michael

[toc] | [prev] | [next] | [standalone]

#7908

Michael Black wrote:

> In the old days, you'd either have to live with a small amount of RAM, or
> do endless repetitive wiring to get a lot of RAM.
>
> Now you can just dig some cache RAM off a motherboard (though I guess
> those are now getting far enough in the past that they may be hard to
> find), and a single IC will give you a nice chunk of RAM to begin with.

You mean some of them /weren't/ fake? :-P

[toc] | [prev] | [standalone]

Back to top | Article view | comp.misc

csiph-web