18 Apr
2014
18 Apr
'14
9:30 p.m.
I could use a dump of the Zilog Z8671 and National Semiconductor INS8073
masked ROMs if anyone has them. Those are the tiny BASIC in ROM versions
of their single-chip micros.
Thanks!
Eric
18 Apr
18 Apr
10:56 p.m.
Did you already find this site?
http://www.armory.com/~rstevew/Public/Micros/Z8/Z8671-BASIC/Z8671-BASIC_ROM…
I was working on a Z8 project a while back that used the BASIC/DBG ROM
version, but never could find the complete assembly listing.
Kyle
11:18 p.m.
On Fri, Apr 18, 2014 at 11:56 PM, Kyle Owen <kylevowen at gmail.com> wrote:
Did you already find this site?
http://www.armory.com/~rstevew/Public/Micros/Z8/Z8671-BASIC/Z8671-BASIC_ROM…
I hadn't seen that. Thanks for the link. I'd still like a dump of the
original (unmodified) ROM code.
19 Apr
19 Apr
1:16 p.m.
I could use a dump of the Zilog Z8671 and National Semiconductor INS8073
masked ROMs if anyone has them. Those are the tiny BASIC in ROM versions
of their single-chip micros.
In the case of the Z8, is this somethign that can be read out using a
BASIC program running on said device? I built a test board using that
chip many years ago, if I can find it, and if it still works, I can
power it up and give it a simple program.
-tony
2:12 p.m.
On Sat, Apr 19, 2014 at 2:16 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
In the case of the Z8, is this somethign that can be
read out using a
BASIC program running on said device? I built a test board using that
chip many years ago, if I can find it, and if it still works, I can
power it up and give it a simple program.
Z8 BASIC DEBUG doesn't have a PEEK function. They have prefix operators
"@" and "^" that do nearly the same thing, for 8-bit and 16-bit
values
respectively. However, because the Z8 has three address spaces, they
interpret an argument between 0 and 255 as being a register or SFR address,
so I don't think you can get the first 256 bytes of the ROM that way.
They have indirect addressing of 16-bit quantities using a ^^" prefix
operator, but I'm not sure whether that can get at the first 256 bytes of
ROM or not.
I could try to write a program that pokes some assembly language into
memory to do the ROM dump.
My objective is to burn their BASIC into an EPROM to use with a 64-pin
prototyping Z8 device. I don't have a Z8671 or I'd be able to dump the
ROM myself, obviously.
Eric
20 Apr
20 Apr
12:16 p.m.
On Sat, Apr 19, 2014 at 2:16 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
I might have known there'd be a catch :-(. The different way of accessing
memory is no problem, but of coruse the fact you can't read the first 256
bytes of ROM is. My guess (without trying it ro R'ing TFM is that the
inderect addresing operator doesn't help
In the case of the Z8, is this somethign that can
be read out using a
BASIC program running on said device? I built a test board using that
chip many years ago, if I can find it, and if it still works, I can
power it up and give it a simple program.
Z8 BASIC DEBUG doesn't have a PEEK function. They have prefix operators
"@" and "^" that do nearly the same thing, for 8-bit and 16-bit
values
respectively. However, because the Z8 has three address spaces, they
interpret an argument between 0 and 255 as being a register or SFR address,
so I don't think you can get the first 256 bytes of the ROM that way.
They have indirect addressing of 16-bit quantities using a ^^" prefix
operator, but I'm not sure whether that can get at the first 256 bytes of
ROM or not.
I could try to write a program that pokes some assembly language into
memory to do the ROM dump.
Before you do that, I'd better see if I can find the board, and if it
stil lruns. It is bound to turn up sometime...
-tony
21 Apr
21 Apr
5:03 a.m.
On Saturday (04/19/2014 at 09:16PM +0100), Tony Duell wrote:
And in the case of INS8073, I can do this too. It has been a while
(like, oh, 30 yrs) since I have played with that micro so I'll need
to remember how to find / access the ROM. The little machine does run
though so if we can write a BASIC program to access the ROM, we can get
the image.
Chris
--
Chris Elmquist
I could use a dump of the Zilog Z8671 and National Semiconductor INS8073
masked ROMs if anyone has them. Those are the tiny BASIC in ROM versions
of their single-chip micros.
In the case of the Z8, is this somethign that can be read out using a
BASIC program running on said device? I built a test board using that
chip many years ago, if I can find it, and if it still works, I can
power it up and give it a simple program. 
8:05 a.m.
On Mon, Apr 21, 2014 at 8:03 AM, Chris Elmquist <chrise at pobox.com> wrote:
And in the case of INS8073, I can do this too. It
has been a while
(like, oh, 30 yrs) since I have played with that micro so I'll need
to remember how to find / access the ROM.
ISTR ROM is 2.5K of the low 4K of the memory map. 8073 Tiny Basic
also uses "@" in place of PEEK() but I don't recall if it returns
valid results in that address range or if it's blocked (CBM BASIC 1.0
used to block PEEKing of BASIC ROMs).
Info and docs at
http://www.penguincentral.com/retrocomputing/INS8073/
-ethan
22 Apr
22 Apr
8:03 a.m.
Thanks Ethan. I found all my docs too and after discovering the SRAM
had died on my little board and fixing that, I've now captured and saved
the ROM image here,
https://drive.google.com/file/d/0B6A73VHTVh23N3IzY2VPUzRteHc/edit?usp=shari…
The top of the capture lists the three line program I used to capture
it,
10 FOR I=0 TO #09FF
20 PRINT I, @I
30 NEXT I
followed by the listing (in decimal obviously) from 0 to #09FF where the
ROM lives.
Have fun!
Chris
On Monday (04/21/2014 at 11:05AM -0400), Ethan Dicks wrote:
On Mon, Apr 21, 2014 at 8:03 AM, Chris Elmquist
<chrise at pobox.com> wrote:
--
Chris Elmquist
And in the case of INS8073, I can do this too.
It has been a while
(like, oh, 30 yrs) since I have played with that micro so I'll need
to remember how to find / access the ROM.
ISTR ROM is 2.5K of the low 4K of the memory map. 8073 Tiny Basic
also uses "@" in place of PEEK() but I don't recall if it returns
valid results in that address range or if it's blocked (CBM BASIC 1.0
used to block PEEKing of BASIC ROMs).
Info and docs at
http://www.penguincentral.com/retrocomputing/INS8073/
-ethan
3901
days inactive
3904
days old
8 comments
5 participants
participants (5)
-
ard＠p850ug1.demon.co.uk -
chrise＠pobox.com -
ethan.dicks＠gmail.com -
kylevowen＠gmail.com -
spacewar＠gmail.com