21 Mar
2002
21 Mar
'02
4:37 p.m.
Oh yeah... the PDT had 6 terminal connectors on the back -- the console
port, three serial lines for terminals, one serial line for a printer
and one modem port which could be either asynch or synch.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
21 Mar
21 Mar
4:59 p.m.
New subject: Source code for 805x line-by-line assembler?
The 805x microcontrollers have been around since the mid-80's, yet I've never
seen a monitor program for them with a "quick-and-dirty" line-by-line
assembler in it as many of the debuggers for the MOT monitors have. Do any of
you guys have a source file of a line-by-line assembler for the 805x series
that can easily be adapted for inclusion in a monitor?
thanx,
Dick
5:35 p.m.
New subject: Source code for 805x line-by-line assembler?
The reason for that is generally memory. The Apple II monitor had a nice
little one built in, and it was a work of art, as far as the opcode
compression and decoding table went. One time (many years ago), I stripped
that portion out of the Apple monitor for another personal project. You
could do the same. It wasn't very difficult to do, just a bit of typing.
--John
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Thursday, March 21, 2002 23:00 PM
To: classiccmp(a)classiccmp.org
Subject: Source code for 805x line-by-line assembler?
The 805x microcontrollers have been around since the mid-80's,
yet I've never
seen a monitor program for them with a "quick-and-dirty" line-by-line
assembler in it as many of the debuggers for the MOT monitors
have. Do any of
you guys have a source file of a line-by-line assembler for the
805x series
that can easily be adapted for inclusion in a monitor?
thanx,
Dick
6:04 p.m.
New subject: Source code for 805x line-by-line assembler?
John Chris Wren wrote:
The reason for that is generally memory. The Apple II monitor had a nice
little one built in, and it was a work of art, as far as the opcode
compression and decoding table went. One time (many years ago), I stripped
that portion out of the Apple monitor for another personal project. You
could do the same. It wasn't very difficult to do, just a bit of typing.
The 6502 has a very simple and regular instruction set that is easy to
encode.
What is 805x controler like?
> The 805x microcontrollers have been around since
the mid-80's,
> yet I've never
> seen a monitor program for them with a "quick-and-dirty" line-by-line
> assembler in it as many of the debuggers for the MOT monitors
> have. Do any of
> you guys have a source file of a line-by-line assembler for the
> 805x series
> that can easily be adapted for inclusion in a monitor?
Lets not forget a version of basic for the apple was all hand coded with
no real source?
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
6:43 p.m.
New subject: Source code for 805x line-by-line assembler?
D'oh! I feel stupid. Don't ask me why I read 65xx with you asked about
805x. I've been writing 805x for about 15 years, and I've never run across
one. I've though about writing one from time to time, but never got around
to it. Since I usually have a pretty tight embedded system, I use all host
side tools. If you write one, I'd be interested in looking at it.
--John
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Ben Franchuk
Sent: Friday, March 22, 2002 0:05 AM
To: classiccmp(a)classiccmp.org
Subject: Re: Source code for 805x line-by-line assembler?
John Chris Wren wrote:
The reason for that is generally memory. The Apple II
monitor had a nice
little one built in, and it was a work of art, as
far as the opcode
compression and decoding table went. One time (many years
ago), I stripped
that portion out of the Apple monitor for another
personal project. You
could do the same. It wasn't very difficult to do, just a bit
of typing.
The 6502 has a very simple and regular instruction set that is easy to
encode.
What is 805x controler like?
> The 805x microcontrollers have been around
since the mid-80's,
> yet I've never
> seen a monitor program for them with a "quick-and-dirty" line-by-line
> assembler in it as many of the debuggers for the MOT monitors
> have. Do any of
> you guys have a source file of a line-by-line assembler for the
> 805x series
> that can easily be adapted for inclusion in a monitor?
Lets not forget a version of basic for the apple was all hand coded with
no real source?
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
22 Mar
22 Mar
4:50 a.m.
New subject: Source code for 805x line-by-line assembler?
John Chris Wren wrote:
D'oh! I feel stupid. Don't ask me why I read 65xx with you asked about
805x. I've been writing 805x for about 15 years, and I've never run across
one. I've though about writing one from time to time, but never got around
to it. Since I usually have a pretty tight embedded system, I use all host
side tools. If you write one, I'd be interested in looking at it.
I have seen 6502/6800 style embedded assemblers. Never used them. I have
not used
a 805x so I don't know the Instruction set for it so I don't know how
easy it would
be to write one. Most user side tools are from the early days of $1000 8
bit computers when you only had ONE computer.Here is some printable
Instruction Set Cards for many cpu's other than 805x. Also many early
computers like the PDP-8,8080 had a instruction set that let you code
directly in octal numbers.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
1 p.m.
New subject: Source code for 805x line-by-line assembler?
805x processors cannot (without external hardware) write to program memory, so any
line assembler would be dependant on some (common) hardware tricks to write to
program space.
Most 805x applications are single chip anyway, so this is not too common. The
closest thing that comes to mind is an 805x Forth that ~may~ have an assembler
extension.
John Chris Wren wrote:
D'oh! I feel stupid. Don't ask me
why I read 65xx with you asked about
805x. I've been writing 805x for about 15 years, and I've never run across
one. I've though about writing one from time to time, but never got around
to it. Since I usually have a pretty tight embedded system, I use all host
side tools. If you write one, I'd be interested in looking at it.
--John
> -----Original Message-----
> From: owner-classiccmp(a)classiccmp.org
> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Ben Franchuk
> Sent: Friday, March 22, 2002 0:05 AM
> To: classiccmp(a)classiccmp.org
> Subject: Re: Source code for 805x line-by-line assembler?
>
>
> John Chris Wren wrote:
> >
> > The reason for that is generally memory. The Apple II
> monitor had a nice
> > little one built in, and it was a work of art, as far as the opcode
> > compression and decoding table went. One time (many years
> ago), I stripped
> > that portion out of the Apple monitor for another personal project. You
> > could do the same. It wasn't very difficult to do, just a bit
> of typing.
>
> The 6502 has a very simple and regular instruction set that is easy to
> encode.
> What is 805x controler like?
>
> > > The 805x microcontrollers have been around since the mid-80's,
> > > yet I've never
> > > seen a monitor program for them with a "quick-and-dirty"
line-by-line
> > > assembler in it as many of the debuggers for the MOT monitors
> > > have. Do any of
> > > you guys have a source file of a line-by-line assembler for the
> > > 805x series
> > > that can easily be adapted for inclusion in a monitor?
>
> Lets not forget a version of basic for the apple was all hand coded with
> no real source?
> --
> Ben Franchuk - Dawn * 12/24 bit cpu *
> www.jetnet.ab.ca/users/bfranchuk/index.html
>
4:18 p.m.
New subject: Source code for 805x line-by-line assembler?
I've got a primitive disassembler, included with the PAULMON2 monitor,
intended to be loaded as an add-on under the control of the monitor, and I
thought I'd parse the input from the console in modes, using table-lookup
during the character-by-character input. That will be simple but not
particularly efficient of memory space. Current generation memory sizes don't
impede the process much, though. The 89C420 has a potential for an 80K
program memory with the on-chip 16K mapped in and out under control of the
SFR's. SInce I have plenty of assemblers and compilers, just not a
line-by-line assembler source for incorporation in the monitor, I'm probably
going to have to roll my own.
Another thing I'd like to find is some 'C' source for an MSDOS-compatible
file
system. There's no reason an 805x development effort has to be PC-based, and
even if it is, there's certainly no reason for it to be tethered to a PC for
every little tweak.
The 89C420 runs fastest out of external memory, allowing 20ns code space
fetches except on page-boundary crossings, and 40ns data space accesses.
With one instruction cycle taking however long it takes to fetch it, I'd say
that's almost fast enough for an old established architecture like the 805x
core. This one executes a single cycle instruction in a single system clock
cycle and it divides the input clock by 1, in the default.
If you work that architecture, this one's certainly worth a look, though it's
not cheap. A hot-rod seldom is.
Dick
----- Original Message -----
From: "Bob Shannon" <bshannon(a)tiac.net>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, March 22, 2002 5:00 PM
Subject: Re: Source code for 805x line-by-line assembler?
805x processors cannot (without external hardware)
write to program memory,
so any
line assembler would be dependant on some (common)
hardware tricks to write
to
program space.
Most 805x applications are single chip anyway, so this is not too common.
The
closest thing that comes to mind is an 805x Forth that
~may~ have an
assembler
extension.
John Chris Wren wrote:
> D'oh! I feel stupid. Don't ask me why I read 65xx with you asked
about
> 805x. I've been writing 805x for about 15
years, and I've never run
across
> one. I've though about writing one from time
to time, but never got
around
> to it. Since I usually have a pretty tight
embedded system, I use all
host
> side tools. If you write one, I'd be
interested in looking at it.
>
> --John
>
> > -----Original Message-----
> > From: owner-classiccmp(a)classiccmp.org
> > [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Ben Franchuk
> > Sent: Friday, March 22, 2002 0:05 AM
> > To: classiccmp(a)classiccmp.org
> > Subject: Re: Source code for 805x line-by-line assembler?
> >
> >
> > John Chris Wren wrote:
> > >
> > > The reason for that is generally memory. The Apple II
> > monitor had a nice
> > > little one built in, and it was a work of art, as far as the opcode
> > > compression and decoding table went. One time (many years
> > ago), I stripped
> > > that portion out of the Apple monitor for another personal project.
You
> > > could do the same. It wasn't very
difficult to do, just a bit
> > of typing.
> >
> > The 6502 has a very simple and regular instruction set that is easy to
> > encode.
> > What is 805x controler like?
> >
> > > > The 805x microcontrollers have been around since the mid-80's,
> > > > yet I've never
> > > > seen a monitor program for them with a "quick-and-dirty"
line-by-line
> > >
assembler in it as many of the debuggers for the MOT monitors
> > > have. Do any of
> > > you guys have a source file of a line-by-line assembler for the
> > > 805x series
> > > that can easily be adapted for inclusion in a monitor?
>
> Lets not forget a version of basic for the apple was all hand coded with
> no real source?
> --
> Ben Franchuk - Dawn * 12/24 bit cpu *
> www.jetnet.ab.ca/users/bfranchuk/index.html
>
23 Mar
23 Mar
1:39 p.m.
New subject: ZX-81 Question
Assuming I wanted to get a ZX-81, what would I want? And are there any
really good 'net resources for the ZX-81?
--John
2:50 p.m.
New subject: ZX-81 Question
If you get one I have several books, manuals, and mag's on it. So if you
questions about the machine are various parts made for it let me know.
----- Original Message -----
From: "John Chris Wren" <jcwren(a)jcwren.com>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, March 23, 2002 6:39 PM
Subject: ZX-81 Question
Assuming I wanted to get a ZX-81, what would I want?
And are there
any
really good 'net resources for the ZX-81?
--John
21 Mar
21 Mar
7:19 p.m.
New subject: Source code for 805x line-by-line assembler?
I don't know that I follow that logic. The 805x series has 64KB of code
space, and 64KB of data space, and most applicatons likely to benefit from the
presence of a line-by-line assembler have a scheme for overlapping the two,
usually in part, since fixed code space resides at the bottom of code space
and fixed data space resides at the bottom of the data map.
Current versions of that (805x) core have considerably more internal resources
than the classic versions. The one I'm presently fiddling with has 16KB of
internal code space and 1.25KB of internal RAM, all in addition to the 64KB of
external code space and 64KB of data space. Moreover, it executes a
single-cycle instruction in 20 ns.
Since errors are often introduced in transcription, that's the part I was
trying to avoid, if an entire already completed line-by-line assembler isn't
to be found.
Dick
----- Original Message -----
From: "John Chris Wren" <jcwren(a)jcwren.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, March 21, 2002 9:35 PM
Subject: RE: Source code for 805x line-by-line assembler?
The reason for that is generally memory. The Apple II
monitor had a nice
little one built in, and it was a work of art, as far as the opcode
compression and decoding table went. One time (many years ago), I stripped
that portion out of the Apple monitor for another personal project. You
could do the same. It wasn't very difficult to do, just a bit of typing.
--John
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Richard Erlacher
Sent: Thursday, March 21, 2002 23:00 PM
To: classiccmp(a)classiccmp.org
Subject: Source code for 805x line-by-line assembler?
The 805x microcontrollers have been around since the mid-80's,
yet I've never
seen a monitor program for them with a "quick-and-dirty" line-by-line
assembler in it as many of the debuggers for the MOT monitors
have. Do any of
you guys have a source file of a line-by-line assembler for the
805x series
that can easily be adapted for inclusion in a monitor?
thanx,
Dick
8158
days inactive
8160
days old
10 comments
6 participants
participants (6)
-
bfranchuk＠jetnet.ab.ca -
bshannon＠tiac.net -
edick＠idcomm.com -
jcwren＠jcwren.com -
jrkeys＠concentric.net -
mbg＠TheWorld.com