9 May
1997
9 May
'97
7:43 a.m.
Just a quickie....
Have any of you guys ever made your own computers?
This is someting I have been thinking of doing but really don't know where
to start. It doesn't have to be fancy (something with a 8088 or Z80 or
6502 would be fine) So does anyone have any "plans" to make one?
Thanks
Les
9 May
9 May
10:35 a.m.
On Fri, 9 May 1997, Mr. Self Destruct wrote:
Just a quickie....
Have any of you guys ever made your own computers?
This is someting I have been thinking of doing but really don't know where
to start. It doesn't have to be fancy (something with a 8088 or Z80 or
6502 would be fine) So does anyone have any "plans" to make one?
I've been thinking about this as well. I did a some searching last year
and came up with a few kits for sale, and a few sites with build your
own computer information. Are you planning on building from scratch,
from plans, or kit?
The kit toward which I am currently leaning is the Southern Cross 1.
It is a Z80 based SBC kit. Further information can be found at:
http://kitsrus.com/sx.html#sx2
Another project which looks interesting is the "MC68030 Workstation Project".
More information at:
http://www.cs.indiana.edu/hyplan/cyliax/ws030%2ehtml
Non-online sources of kits are "Circuit Cellar Ink" and "Nuts and
Volts"
magazines. Both of these contain ads for kits and trainers.
--pec
--------------------------------------------------------------------------
10 May
10 May
5:13 a.m.
On Fri, 9 May 1997, Paul E Coad wrote:
I've been thinking about this as well. I did a
some searching last year
and came up with a few kits for sale, and a few sites with build your
own computer information. Are you planning on building from scratch,
from plans, or kit?
I wanted to build from scratch (i.e with Radio Shack/Jameco/scraps and
pieces, etc.)
Nothing big, just something small, with maybe a floppy and a serial port
for a terminal.
The kit toward which I am currently leaning is the
Southern Cross 1.
It is a Z80 based SBC kit. Further information can be found at:
http://kitsrus.com/sx.html#sx2
hmmmm, maybe Ill check that one out!
Thanks,
Les
7:39 a.m.
On Sat, 10 May 1997, Mr. Self Destruct wrote:
On Fri, 9 May 1997, Paul E Coad wrote:
Hey, so have I! I want to build a 6502 because
1. I already have a KIM and a SYM board 8-) for debugging.
2. I know the 6502 pretty well.
3. I have a 6502 Assembler wtih macro and structure support.
4. I have a 6502 Run/Single step emulator with programmable hardware
emulator.
5. It is an extrememly easy processor to interface with.
3 and 4 ain't fast but they do work 8-) on almost everything.
I think 5 is the most important. The same can be said for all the old
8-bitters tho.
For what you want, I would suggest a 6502, xtal, a couple of resistors
and caps, a 6522, 2-32K Static RAM chips and 1-32k EPROM. Since the 6502
is memory mapped IO, you would lose the memory wherever you put the IO
page but with a 74688? you could map any single or multiple 256 byte hunks
to IO real easy. My original thought was to use the reset line to switch
the ROM in and out of memory space so boot up would be to copy ROM to the
lower 32k and then recopy it to the upper 32k after the RAM is switched
back in. I think this is pretty standard stuff.
I have even thought (a little) about using PICs for IO devices and letting
them use IIC (I2C) to talk out one serial port to multiple devices. This
would be for the serial devices only, I would probably keep the 6522s for
parallel stuff (disk drives). Xebec used to make a Hard Drive controller
that would talk to any computer with an 8bit parallel device - don't know
IDE drives but I remember reading several companies do that for *newer*
computers. The problem being raw speed.
BC
I've been thinking about this as well. I did
a some searching last year
and came up with a few kits for sale, and a few sites with build your
own computer information. Are you planning on building from scratch,
from plans, or kit?
I wanted to build from scratch (i.e with Radio Shack/Jameco/scraps and
pieces, etc.)
Nothing big, just something small, with maybe a floppy and a serial port
for a terminal.
The kit toward which I am currently leaning is
the Southern Cross 1.
It is a Z80 based SBC kit. Further information can be found at:
http://kitsrus.com/sx.html#sx2
hmmmm, maybe Ill check that one out!
Les
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days inactive
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