17 Aug
2016
17 Aug
'16
8:56 a.m.
On 2016-Aug-16, at 9:55 AM, Brad H wrote:
Thanks Brent. So when I hit the end of an 'S'
record line.. is it just a
Line Feed I need to go to the next? Or just type the next S record right in
behind it?
Either should be OK, an S record is terminated by the number of bytes in the byte count
field and
the monitor should be ignoring CR/LF in-between S records.
Also curious about how you type S records at the
monitor prompt. I'm
reading and trying to figure out how to do that.
In the same manner as being discussed, after starting an L command.
You typically aren't going to want to formulate your own S records other than as an
exercise,
the point was just that it is possible - it's all just ASCII text.
Bill's method, of executing an M command from a text file, achieves the same thing:
filling memory.
Something it's missing versus the S-record/loader format method is a checksum or any
data check.
One may may not be concerned about line noise over a short RS-232 line, but if there are
problems like
dropped characters, receivers overruns, framing errors, etc., due say to speed or line
config issues the
M command method isn't going to tell you about it, while the S-record method
will/should (in most cases)
report a data error.
Many thanks!
Brad
-----Original Message-----
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brent
Hilpert
Sent: Tuesday, August 16, 2016 9:29 AM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Re: SWTPC 6800
Yes, the monitor just sees bytes coming at it, it can't distinguish whether
they're typed or coming from a host/machine, as long as the byte sequence
accords with the Motorola S record format.
You can formulate your own S records and type them at the monitor, too.
On 2016-Aug-16, at 9:09 AM, Brad H wrote:
Another question if I may -- for a short TXT
loader file.. could I
manually enter the information contained therein with my terminal?
I'm just thinking for a quick memory test, etc -- it'd be six of one
half a dozen of the other in terms of time to hook up a PC terminal and
send the
file..
>
> If I were to hit L to put the 6800 into load mode, could I then just
> type out the contents of the loader file with the CT1024's keyboard?