Re: Handic Software Multi-Switch

http://shazam.zapto.org/igal/cbm-vic-switch-1/

http://shazam.zapto.org/igal/cbm-vic-switch-2/

I believe I too also have one example of same with the daughter board.
God knows where. If I find it I will take photos.
Seems very important to recreate it. As specially a burst mode supportive
version for the c128.

Regards,
Ken
.-.-.

On 27/07/2018 4:21 am, "Jim Brain" <brain@jbrain.com> wrote:

On 7/26/2018 11:16 AM, Ville Laustela wrote:
> Hi all.
>
> I came into posession of a swedish-made serial switch-box for the C64
(share one devices between up to 8 computers). Very much like this one:
https://www.richardlagendijk.nl/cip/mix/item/handic_vic-switch/en and in a
nice shape with original box.
>
> However my unit has some differences to images I found online:
>
> - The sticker on the front says Multi-switch (not Vic-Switch), and the
box says it’s for Vic-20, C64, 16, Plus/4 or 128 machines. (However the
two-page manual only speaks of Vic-20 and C64)
>
> - My unit does not have AC mains input, but a barrel connector that looks
somewhat bodged-in. It’s center negative. (The manual shows a mains input)
>
> - Inside the unit there is an extra PCB mounted over the mainboard and a
big ribbon cable connecting it to the bottom side of the main board.
>
> - Inside the unit there is no mains transformer as in images online. The
rectifier is on the board, but the ac side of it is not connected at all,
and the DC input is wired straight to the DC side of it, going to the two
parallel 470uF/25v electrolytics. Then the power rails continue to the 7815
and 7805 regulators’ inputs.
>
> I got the unit without power supply (also non-tested due to that).
Looking at the board it seems that I should use a DC power supply of
something between 15v - 25v. Does this sound correct?
>
> Here are some pictures of my unit: https://postimg.cc/gallery/2jv4u1jjw/
I have the non-daughterboard unit here, on loan from someone to reverse
engineer, which I have done.  I can check the rating on the PSU tonight.

Also, happy to share the schematic of the reverse engineering.  I would
also love to somehow reverse engineer the daughterboard.

JIm

>
> Cheers,
> Ville



-- 
Jim Brain
brain@jbrain.com
www.jbrain.com