开云体育

I actually have documentation that covers the 7854 version I have
courtesy of Dave over at ArtekManuals but it helps to see a picture of
the board. The scanned manual I have is not the clearest.

Before I picked up a 7854, I researched the MOSTEK ROM problem and I
was all prepared to convert one over to modern EPROMs except when I
finally picked up a 7854, it did not match anything I had studied.

It looks to me like there are five different firmware versions of the
early design up to serial number B099999 including three different
mask ROM sets and one later hardware version for serial number B100000
and above which is the one I ended up with.

B000000 to B099999
10 x 2114 SRAMs FPLA 4 x 8Kx8 mask ROM 2 x 2Kx8 EPROM

B100000 and above
2 x 8Kx8 SRAMs 2 x 16Kx8 EPROMs

On Thu, 03 Jan 2013 12:49:33 -0000, "bogroca"
wrote:

Here is mine:


Wow! Interesting! As far as I could see your postings about it, it seems that there is no docs about it. Nice never the less.

Regards,

Bogdan

--- In TekScopes@..., David wrote:

A picture of the memory board(s) in you 7854 would help.

Here are pictures of my ID screen and memory board (single) in my
7854:




I have not yet figured out how many different hardware versions of the
7854 there are but mine lacks the FPLAs and uses a single memory board
with two 6264 SRAMs and two 27128 OTP EPROMs.

On Wed, 02 Jan 2013 20:41:04 -0000, "bogroca"
wrote:

Sorry, I forgot to put the link to the pic!



Regards,
Bogdan

--- In TekScopes@..., "bogroca" wrote:

Hello all (and Ha Happy New Year)

I am looking for the images of the version -02 of the 7854 scope. All I could find are either the -00 or the old ones from Pentti. Anybody have them?
I was able to read the FPLAs (82S107 ver -00 and -02), but the ROMs themselfs are bad...

Best regards,

Bogdan