Comments on: Sharp MZ-80B

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Tue, 16 Jul 2019 05:48:02 +0000

Only this one:

https://www.sharpmz.no/dl/search.php?machines%5B%5D=MZ-80B&categories%5B%5D=Games&searchtext=&submit_form=Search&search_rows_per_page=50#search_result

By: Chris Hill

Chris Hill — Tue, 16 Jul 2019 02:46:54 +0000

where can i find tape images of games for this? like space invaders and such. software seems impossible to find.

By: Günther

Günther — Sat, 24 Nov 2018 17:22:01 +0000

@xAD / nIGHTFALL
I played around with the trimmers, but the image is unchanged (still just a horizontal line in the center of the screen). However I connected my GBS8300 CGA2VGA converter to the video pins on the MZ80B mainboard (#2=Csync/#3=Video/#4=GND) and immediately got a perfect image on my VGA screen. Unlike the MZ700 and MZ800 (having separate Hsync and Vsync signals on their external video connectors), the MZ80B mainboard just provides combined sync. The GBS8300 handles this very well, so I am satisfied with the result for the time being (http://www.pocon.at/MZ80_mon.jpg) ;-)

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Wed, 21 Nov 2018 10:26:46 +0000

@Günther

No LEAKED! absolutrly NOT it’s only a GLUE which has turned yellowed with age.

The MZ80 use: Sync H,Syc V, Video.

Try adjusting the VERTICAL and HORIZONTAL trimmers slightly, take care high voltages in the monitor.

By: Günther

Günther — Tue, 20 Nov 2018 20:04:00 +0000

@xAD / nIGHTFALL
Hi,
well unfortunately the problem is now pretty obvious as I opened the monitor cover. Basically all capacitors have leaked (as you can easily see in the image http://www.pocon.at/MZ80_mon.jpg). So I might give it a try with hooking up a TV set (SCART connector) to the internal monitor connector. The second pin of the connector is supposed to be SYNC and the third pin should be (composite) VIDEO. The 15.75 kHz horizontal sync should be quite ok. However I am not sure about signal levels and vertical sync. Overall I believe an NTSC TV set or scan converter might work, so I guess I will give it a try…

By: xAD / nIGHTFALL

xAD / nIGHTFALL — Sun, 18 Nov 2018 22:18:47 +0000

@Günther

Hi Günther,

Seems to close the vertical, try to adjust the internal potentiometers/trimmers of the monitor (for example: V-SIZE)

By: Günther

Günther — Sun, 18 Nov 2018 21:24:15 +0000

Dear Nightfallcrew,
I am following your work since a while. I am also collecting old computers and trying to repair them, but I am not so advanced as you. Now I found a nice Sharp MZ-80B. The power supply capacitors are blown, so I removed them as you have described. Now the computer powers up properly, but shows only one green line at the center of the display (http://www.pocon.at/MZ80b.jpg). When I insert a disc into the floppy disc drive, the computer tries to boot from the disc. Hence the system itself seems to work. I assume that either the line transformer or some other capacitors are defective. Unfortunately I have no access to an oscilloscope, I am working only with a simple multimeter. Do you maybe have a hint how to debug the display or how to connect an external display for testing (e.g. a Commodore 1084S)?
Thanks in advance and best regards,
Günther

By: Luxmalc

Luxmalc — Wed, 27 Jun 2018 12:56:05 +0000

Hi
Help please !
What is the geometry of the 5.25″ discs used on the A and B models please ?
Is one of them 280k (35 tracks x 2 sides x 16 sectors of 256 bytes) ?
Are both A & B the same ?
Thanks in advance
Malc

By: Paul Chang

Paul Chang — Fri, 30 Mar 2018 01:10:16 +0000

PS.

Or any kind 80-B floppy base OS is fine.
I possible I like have Floppy run on MZ80BF

By: Paul Chang

Paul Chang — Fri, 30 Mar 2018 00:58:27 +0000

Dear sir,

Can I purchse 80B diskBasic( Sp6520) from you?

Best regards,

By: Libra

Libra — Sun, 20 Apr 2014 16:45:55 +0000

Ciao Xad,

Complimenti per l’MZ-80B.
Ma dove lo hai trovato?
Queste macchine di solito sono solo
per il mercato interno Giapponese.

Grazie,

Libra