16 May
2015
16 May
'15
7:43 p.m.
The 8041 has the same pinout as the Intel 8741 programmable. A Pro-Log M980
PROM Programmer with a PM 9054 personality module can read out the programs
inside.
I did a lot of Intel 8741 Development back in the day and even reverse
engineered the PIO in an Intel MDS-225. I have a MDS-225 now I'm getting
going from pieces.
Richard Main
+1 510-229-9711
Newark, CA USA
17 May
17 May
3:48 p.m.
On Sat, May 16, 2015 at 5:43 PM, Richard B. Main, Esq.
<mainpatents at gmail.com> wrote:
The 8041 has the same pinout as the Intel 8741
programmable.
It's the same pinout, but the 8041 is NOT rated for application of
+25V to the EA pin, as used to do ROM verification of the 8741.
A Pro-Log M980 PROM Programmer with a PM 9054
personality module can read out the programs
inside.
Does the Pro-Log have a specific setting for 8041, or are you using
the 8741 setting and overstressing the part?
I've successfully read 8048 parts using a programmer configured for
8748, but I only did that on parts that I could afford to sacrifice. I
don't have spares of the IOC 8041A, so I'm building a kludge to read
it properly without applying 25V to EA.
3:55 p.m.
As far as I remember, + 25 isnt used for rom reading. You can read any
8048/8049 as 8748/8749 with no danger. And they have no soft protection. So
any uc *48 and *49 can be copied.
enviado do meu telemovel
Em 17/05/2015 16:48, "Eric Smith" <spacewar at gmail.com> escreveu:
On Sat, May 16, 2015 at 5:43 PM, Richard B. Main,
Esq.
<mainpatents at gmail.com> wrote:
The 8041 has the same pinout as the Intel 8741
programmable.
It's the same pinout, but the 8041 is NOT rated for application of
+25V to the EA pin, as used to do ROM verification of the 8741.
A Pro-Log M980 PROM Programmer with a PM 9054
personality module can
read out the programs
inside.
Does the Pro-Log have a specific setting for 8041, or are you using
the 8741 setting and overstressing the part?
I've successfully read 8048 parts using a programmer configured for
8748, but I only did that on parts that I could afford to sacrifice. I
don't have spares of the IOC 8041A, so I'm building a kludge to read
it properly without applying 25V to EA.
5:07 p.m.
On Sun, May 17, 2015 at 1:55 PM, Alexandre Souza
<alexandre.tabajara at gmail.com> wrote:
As far as I remember, + 25 isnt used for rom reading.
You can read any
8048/8049 as 8748/8749 with no danger. And they have no soft protection. So
any uc *48 and *49 can be copied.
25V isn't used for reading the 8041 and 8048, but it *is* used for
reading the 8741, 8741A, 8748. That can be seen in the Intel
datasheets as well as the MCS-48 and UPI-41 user manuals. I've also
verified the presence of 25V during read on multiple device
programmers.
I have in fact read some 8048 and 8049 parts as 8748 and 8749,
respectively, but only with parts that I had spares of, since the 8048
and 8049 are NOT rated for use of +25V to read, and instead are
supposed to be read with EA at +12V. While it's reasonably plausible
that putting +25V on EA won't damage an 8041A, I don't have another
instance of the 8041A with the same code, so I'm not willing to risk
it.
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