"As analysys shows,
A3 - Sync - composite sync
B2 - common
B4 - protective ground
A1 - intencity (high brightness)
A5 - video (i.e. binary brightness)
You can try to connect it to composite monitor. Mix video and intens via 1k resistors , get video.
Take diode - anode to sync, cathode to that video. Plug it into TVset or composite monitor. "
(Note: A1/B1 are near the power supply)
Another scheme from Konstantin Fotin.
There are two schemes on this picture; the upper just is pinout and +12 to +5 convertor (quite
standart), the next is "scheme on 7404", and the third is one more scheme.
201310. I've tried the scheme with 7404, everything works but left chars are rolled to
left of screen.
201311. I use this (with 7404) scheme (as my native monitor died at 2013)! On 1715 motherboard
there are two tunable resistors(?) near the CPU which
tunes VSync and Hsync. The picture is near to ideal on Electronica MS6105 monitor!
Here (local copy)
comrade Zander (who currenly at 2010+
maintains a *very* usefull site) proposes resistor-based sync mixer, much like Teodor's
201406. I'm using resistor-based mixer. Do not care - use it - the simpliest, works with
Electronica MC6105 ("The Little Bell", Digital VR201 clone) monitor.
here is smth that looks like DOS *.SYS driver
to read SCP disks. Have not tried (taken from here)
Creating an Image of Robotron 1715 disks on linux
In short and for purpose of local mirroring - here what's alecv wrote:
"Go to http://fdutils.linux.lu/disk-id.html and install fdutils.
$ setfdprm /dev/fd0 QD sect=5 ssize=1024 cyl=80
$ dd if=/dev/fd0 of=robotron.img bs=1024
800+0 records in
800+0 records out
819200 bytes (819 kB) copied, 40.4986 s, 20.2 kB/s
Same for writing back. Also, you can format the disk with superformat."
(Note: Most floppy images on my site are CopyQM images.
Only a few of them are .IMG files on this site currently)
Note: if you ever install 3.5 drive, looks like QD must be replaced by DD
Great site http://honi.hucki.de/ in german about floppy drives conversion. Covers
Chinon, Epson, Mitsubishi, Mitsumu, Panasonic, Samsung, Teac and Sonstige drivers. Covers most of robotron technics
Но и мы не лохи, вот так надо ставить джамперы на наши исконно-посконные МС5311/5309/53херзнает какие дисководы
Пробовал сам, работает.
This is a scheme of robotron 1715, scanned! Схема Роботрона 1715, сканированная!
This files were taken from
The message there says 1715G, but I know 1715 and 1715M == 1715W... May be G is
just a mistake...
More, the original site is all in Deutch, and I got lost in it ;-(.
UPD: Sure, it's 1715 scheme, not W/M!
Нижеследующие файлы были скачаны с
На сайте написано 1715G, но я такого не знаю, скорее всего это просто ошибка,
это скорее всего одно из 1715 / 1715W == 1715M
и еще там все по немецки написано, я в нем ни бум-бум
UPD: Ну разумеется 1715, а не M!
UPD 201401. The keyboard is really plugged into SIO (and much like serial) but uses also CLK.
So to transfer byte you have to send it (on TTL levels) mostly as usual (8N1 with stop/start bits) and provide
click in that CLK line (looks like at falling egde).
Rom Images of Robotron 1715 (2716)! /I havnt try to diasam it/
... but here is a disasseble attempt by
Christian Corti of Computermuseum der Fakultaet Informatik (Stuttgart) 2002, very usefull
and somehow commented