16 Apr
2005
16 Apr
'05
7:33 a.m.
Subject: Re: 7201 (was Re: Z8530 (was Re: Navtel 9460
Protocol Analyzer info?))
From: Tom Jennings <tomj at wps.com>
Date: Fri, 15 Apr 2005 22:24:29 -0700 (PDT)
8251! Now there's a turkey! At least it was simple.
One of the
buggiest pieces of crap I ever had to initialize.
I use the for basic serial as they depending on version are
predictable and easy to init. using them for other protocals,
can you say masochistic!
Serial chips, I get post-traumatic-stress just thinking
about
them.
I'll remember that one. Though compared to serial chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
Allison
16 Apr
16 Apr
9:06 a.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer info?))
Allison wrote:
I'll remember that one. Though compared to serial
chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
Has anybody made a easy to use serial chip, all seem to be lacking some
feature?
The only way I like to program is I/O is 'hardware" setup ... Dip
switches and hard reset
lines. :)
Allison
9:44 a.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 ProtocolAnalyzer info?))
From: "woodelf" <bfranchuk at jetnet.ab.ca>
Sent: Saturday, April 16, 2005 11:06 AM
Allison wrote:
The only serial chips that I am aware of that do not require any programming
are old style dumb UARTs like the 6402 sold by Jameco.
They have no fifo buffering, they are simple to use devices.
Randy
www.s100-manuals.com
I'll remember that one. Though compared to
serial chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
Has anybody made a easy to use serial chip, all seem to be lacking some
feature?
The only way I like to program is I/O is 'hardware" setup ... Dip
switches and hard reset
lines. :)
>Allison 
10:08 a.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer info?))
On Sat, 16 Apr 2005 10:06:31 -0600
woodelf <bfranchuk at jetnet.ab.ca> wrote:
Allison wrote:
You might want to check out the 6402. I have a bunch of them from some
syncronous modems I scrapped a few decades back. It has the distinction
of being from the same family as the 6100 'PDP-8 on a chip' micro, and
is fairly bare-bones. It has several simple registers, but much of the
config is done with hardware by enabling pins and what-not.
I'll remember that one. Though compared to
serial chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
Has anybody made a easy to use serial chip, all seem to be lacking
some feature?
The only way I like to program is I/O is 'hardware" setup ... Dip
switches and hard reset
lines. :)
>Allison
> 
1:20 p.m.
On 4/16/05, Scott Stevens <chenmel at earthlink.net> wrote:
You might want to check out the 6402. I have a bunch
of them from some
syncronous modems I scrapped a few decades back. It has the distinction
of being from the same family as the 6100 'PDP-8 on a chip' micro, and
is fairly bare-bones. It has several simple registers, but much of the
config is done with hardware by enabling pins and what-not.
I have used them in the context of the FDC6120. ISTR they share a
mode with the RCA 1854 that was common on 1802s. I think _all_ the
setup is by grounding/pullingup pins. Handy for designs that need to
have serial up and running right away, before there's time to
initialize in software.
-ethan
11:03 a.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer info?))
On Sat, 16 Apr 2005, woodelf wrote:
Has anybody made a easy to use serial chip, all seem
to be lacking some
feature?
The Zilog SIO types are fine by me. The yard sale full of assorted
and scattered registers is annoying, but programmers opinions
don't count. It does pretty much everything required for
full-featured async. At least it does what you tell it to.
12:06 p.m.
Tom Jennings wrote:
On Sat, 16 Apr 2005, woodelf wrote:
Well I favor dumb chips at the moment because I don't have
several MEG or EPROM to bootstrap my HOMEBREW computer.Infact I have
no PROM of any kind, just toogle switches*. Since I favor a 6809
style of memory access** I am using 68B50's. I just need to finish
the CPU logic design and build it. :)
*The design CPLD based so I can add a SMALL bootstrap of 32 words.
** Adress and data are latched with Q.
Ben alias woodelf
Has anybody made a easy to use serial chip, all
seem to be lacking
some feature?
The Zilog SIO types are fine by me. The yard sale full of assorted
and scattered registers is annoying, but programmers opinions
don't count. It does pretty much everything required for
full-featured async. At least it does what you tell it to.
2:19 p.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer info?))
> The Zilog SIO types are fine by me. The yard sale
full of assorted
> and scattered registers is annoying, but programmers opinions
> don't count. It does pretty much everything required for
> full-featured async. At least it does what you tell it to.
On Sat, 16 Apr 2005, Ben Franchuk wrote:
Well I favor dumb chips at the moment because I
don't have
several MEG or EPROM to bootstrap my HOMEBREW computer.Infact I have
no PROM of any kind, just toogle switches*. Since I favor a 6809
style of memory access** I am using 68B50's. I just need to finish
the CPU logic design and build it. :)
Well if we're getting nostalgic, my hands-down favorite are
minicomputer programmatic interfaces. Talk about hardware-heads.
Brutally simple, non-modal, wide flat registers, does DMA, error
handling and makes you coffee while you wait. But instead of a PIA
plus glue or whatever you get the whole TI product line and six
copper layers. I guess that's what heats the coffee water.
4:53 p.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol
Has anybody made a easy to use serial chip, all seem
to be lacking some
feature?
The only way I like to program is I/O is 'hardware" setup ... Dip
switches and hard reset
lines. :)
Which reminds me... The HP98036 (serial [1] interface for the 9825, 9835,
9845 computers) uses an 8251 USART. It's initially configured by dip
switches on the PCB, there's a little state machine to load the right
values into the 8251's registers.
-tony
11:42 a.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer info?))
Tom Jennings wrote:
Serial chips, I get post-traumatic-stress just
thinking about them.
Allison wrote:
I'll remember that one. Though compared to serial
chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
I've been saying for years that hardware design is far too important
to be left up to hardware engineers. :-)
Eric
4:56 p.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer
I've been saying for years that hardware design is
far too important
to be left up to hardware engineers. :-)
It would be simpler if hardware engineers learnt to program (and
conversely if programmers, particularly low-level programmers, had some
clue about hardware...)
-tony
4:47 p.m.
New subject: 7201 (was Re: Z8530 (was Re: Navtel 9460 Protocol Analyzer
Serial chips, I
get post-traumatic-stress just thinking about
them.
I'll remember that one. Though compared to serial chips many disk
controllers and their associated stuff that wraps around them
programtically are pretty horrid too.
7192
days inactive
7192
days old
11 comments
8 participants
participants (8)
-
ajp166＠bellatlantic.net -
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
cctalk＠randy482.com -
chenmel＠earthlink.net -
eric＠brouhaha.com -
ethan.dicks＠gmail.com -
tomj＠wps.com