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Re: QL's external MDV port
Posted: Thu Sep 22, 2016 8:41 pm
by 1024MAK
Hey, great news. I'm glad you found the problem.
I had been scratching my head, because I could not see anything wrong...
Mark
Re: QL's external MDV port
Posted: Fri Sep 23, 2016 4:40 am
by Bloodnok
Hi Tomas,
Great work! Writing and formatting all OK?
Re: QL's external MDV port
Posted: Fri Sep 23, 2016 8:24 am
by tcat
Hi Charles,
Thank you for taking your interest, R/W test alright, format due to test.
You may follow my MDV observations here, where I have had some questions regarding R/W and Erase head resistance.
http://theqlforum.com/viewtopic.php?f=2& ... 204#p14204
Tomas
Re: QL's external MDV port
Posted: Wed Nov 02, 2016 12:55 pm
by tcat
Hi,
I have designed another PCB, that swaps signals on the left edge, so is useful to connect with ribbon cable.
Each board has insignia 'mPort', the one that swaps signals has an 'X', so I can connect in theory up to 6 external drives. Doing that, only one 'mPort-X', and 5 'mPort's are needed.
- mPort - X - board
- two MDs connected in a chain
Tomas
Re: QL's external MDV port
Posted: Wed Nov 02, 2016 12:57 pm
by vanpeebles
Outsoft will be your new best friend if he can use that many microdrives
Re: QL's external MDV port
Posted: Wed Nov 02, 2016 1:42 pm
by Outsoft
vanpeebles wrote:Outsoft will be your new best friend if he can use that many microdrives
We are just best friends
Tomas is the author of mDoubler and the man that helps me on the Sinclair BBS ^_^
Re: QL's external MDV port
Posted: Wed Nov 02, 2016 3:00 pm
by vanpeebles
Hehehe
Re: QL's external MDV port
Posted: Thu Nov 03, 2016 9:27 am
by Derek_Stewart
tcat wrote:Hi,
I have designed another PCB, that swaps signals on the left edge, so is useful to connect with ribbon cable.
Each board has insignia 'mPort', the one that swaps signals has an 'X', so I can connect in theory up to 6 external drives. Doing that, only one 'mPort-X', and 5 'mPort's are needed.
mdport-brd.png
mdv-chain.JPG
Tomas
Hi Tomas,
Can any other device be connected to the expansion board.
Re: QL's external MDV port
Posted: Thu Nov 03, 2016 1:52 pm
by tcat
Hi Derek,
mPort allows connecting only QL MD units in a chain, up to 6 in total.
I am not much into electronics, and all my ventures in this respect are that of a hobbyist, but I can imagine other devices complying with 'MD-BUS' protocol (which I believe is similar to serial line) can be connected.
Tomas
Re: QL's external MDV port
Posted: Thu Nov 03, 2016 11:32 pm
by Cristian
tcat wrote:Hi,
I just wish to report that mPort works!
You're
great!