MZ 700 - rear view

fitus
Posts: 34
Joined: Tue Jun 12, 2018 8:52 pm

MZ 700 - rear view

Post by fitus » Sun Nov 17, 2019 1:58 pm

Hello friends,
I would like to buy MZ 700 for my collection.
This piece has some kind of expansion slot on the rear view. What is it?
Attachments
MZ 700.PNG
MZ 700.PNG (236.36 KiB) Viewed 273 times

hlide
Posts: 312
Joined: Thu Jan 25, 2018 9:31 pm

Re: MZ 700 - rear view

Post by hlide » Mon Nov 18, 2019 12:07 am

Surely a parallel centronics connector. Inside there is a printer connector.

UncleBod
Posts: 22
Joined: Tue Sep 18, 2018 1:26 pm

Re: MZ 700 - rear view

Post by UncleBod » Mon Nov 18, 2019 9:49 am

The problem is that the DB-25 was used for Centronics and for RS-232. You have to open up and look to know what it is.
The use of female or male connectors was up to the implementation in those days.

hlide
Posts: 312
Joined: Thu Jan 25, 2018 9:31 pm

Re: MZ 700 - rear view

Post by hlide » Mon Nov 18, 2019 1:20 pm

Ah yes, it is not centronics. Sorry. It a DB-25.

In https://original.sharpmz.org/mz-700/mothbrd.htm, see 24 : "The connector P-1 physically connects the plotter signals to the system". It could be connected to P-1. Can you use RS-232 and can MZ-700 read through this external printer connector or P-1 connector? The schematics seem to indicate you can only output data, not input data.

UncleBod
Posts: 22
Joined: Tue Sep 18, 2018 1:26 pm

Re: MZ 700 - rear view

Post by UncleBod » Mon Nov 18, 2019 3:03 pm

Still, without knowing where the connector is connected, you will only guess. It might be a (home built) interface board hidden under the cover.
A Centronics interface is still not impossible. There were Centronics interfaces that had DB-25 on the computer side and Centronics on the printer side. /Nils-Arne

hlide
Posts: 312
Joined: Thu Jan 25, 2018 9:31 pm

Re: MZ 700 - rear view

Post by hlide » Mon Nov 18, 2019 4:12 pm

Sure, it would be better to have a look inside: maybe there is card at the same height.

fitus
Posts: 34
Joined: Tue Jun 12, 2018 8:52 pm

Re: MZ 700 - rear view

Post by fitus » Mon Nov 18, 2019 8:19 pm

Thank you all. It is quite interesting to see how many home-built improvements can be seen in the world.
The auction is gone, so somebody else will know the truth.

Jo Even
Site Admin
Posts: 124
Joined: Wed Jan 17, 2018 9:28 pm

Re: MZ 700 - rear view

Post by Jo Even » Sat Nov 23, 2019 6:16 pm

UncleBod wrote:
Mon Nov 18, 2019 9:49 am
The use of female or male connectors was up to the implementation in those days.
The only computer I know that use a male DB25 printer port and female DB25 serial port is the Amiga 1000, and even back in 1985 it was criticized for not having standard ports. So if you see a female DB25 on the back of a computer you can be pretty sure that it's a printer port.

S_U_C
Posts: 25
Joined: Sun Feb 17, 2019 6:41 pm

Re: MZ 700 - rear view

Post by S_U_C » Mon Nov 25, 2019 11:13 am

From the position of the reset button and the volume control on the righthand side of the connectors indicate you have a MZ800 not a MZ700.
The large connector with the system switches and the joystick i/o port.
The small connector is for printer output.

S_U_C
Posts: 25
Joined: Sun Feb 17, 2019 6:41 pm

Re: MZ 700 - rear view

Post by S_U_C » Mon Nov 25, 2019 11:45 am

Sorry to raise you hopes it is a MZ700, the "Sharp MZ700/8000 - EXPODED-" by John Simpson has the rear image of the MZ700 on page 5 as a mirror image.
The MZ800 rear image on page 6 is correct with the system switches visible.
Your image after saving and previewing, I can not see the switches.

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