13 Dec
2005
13 Dec
'05
10:22 p.m.
Subject: Re: CUBIX/6809 updates
From: woodelf <bfranchuk at jetnet.ab.ca>
Date: Tue, 13 Dec 2005 15:05:58 -0700
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>
I think a Floppy chip with a real built in data separator is the way to go.
Find a37c65 or 9266. no big deal using raw ttl as then you can do ANY
data rate.
Also a good dma is needed, as having the cpu do
floppy I/O leaves
no margin for serial I/O.
Not required. Small system, nice addition but pumps up complexity
more than a bit.
most of the S100 CP/M systems (and some of the SBCs) are non DMA and
not even interrupts for serial IO. All polled. Not as nice but
hardly serious.
The other thing is a NICE terminal to go with the
system. I don't want
to boot windows or dos to run a terminal. For development work a PC is
a good idea until you get a OS running. I have a used Altos IV here,
from what the keyboard says but I don't know of how many years of
life the terminal may have left.
Fix it, build one or find a VT220,320,320 whatever.
myself I plan to buld a subsystem terminal but for the time being a
VT320 or a DEC VK170 for those that know what that is.
Allison
13 Dec
13 Dec
10:49 p.m.
I think a
Floppy chip with a real built in data separator is the way to go.
Find a37c65 or 9266. no big deal using raw ttl as then you can do ANY
data rate. Also a good
dma is needed, as having the cpu do floppy I/O leaves
no margin for serial I/O.
Not required. Small system, nice addition but pumps up complexity
more than a bit. The other thing
is a NICE terminal to go with the system. I don't want
to boot windows or dos to run a terminal. For development work a PC is
a good idea until you get a OS running. I have a used Altos IV here,
from what the keyboard says but I don't know of how many years of
life the terminal may have left.
Fix it, build one or find a VT220,320,320 whatever. 
14 Dec
14 Dec
4:29 a.m.
Dave Dunfield wrote:
Also a good idea.
Agreed, although there is nothing in the design of CUBIX to prevent a DMA
disk interface.
Or do like I did in the original portable unit - put on a 6845 and do your
own video display.
No way that would work, as I don't have a TTL level monitor here, or a
real keyboard...
Just PC stuff! I still not figured out the terminal design yet, but it
would have 3 over laping
displays ... lowest level -- some sort of graphic display -- say 8 grey
or 8 colors -- 3 dots per
byte. Second level -- User Ascii with fixed colors and transparentcy.
Third level -- System Ascii
and borders and cursor pointers.
I think a Floppy chip with a real built in data
separator is the way to go.
Find a37c65 or 9266. no big deal using raw ttl as then you can do ANY
data rate.
Also a
good dma is needed, as having the cpu do floppy I/O leaves
no margin for serial I/O.
Not required. Small system, nice addition but pumps up complexity
more than a bit.
The other
thing is a NICE terminal to go with the system. I don't want
to boot windows or dos to run a terminal. For development work a PC is
a good idea until you get a OS running. I have a used Altos IV here,
from what the keyboard says but I don't know of how many years of
life the terminal may have left.
Fix it, build one or find a VT220,320,320 whatever.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.parse.com/~ddunfield/museum/index.html
.
9:35 p.m.
Or do like I
did in the original portable unit - put on a 6845 and do your
own video display.
No way that would work, as I don't have a TTL level monitor here, or a
real keyboard...
6966
days inactive
6967
days old
3 comments
4 participants
participants (4)
-
ajp166＠bellatlantic.net -
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
dave04a＠dunfield.com