BeebSCSI mini

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Bagpuss
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Re: BeebSCSI mini

Post by Bagpuss » Wed Apr 11, 2018 3:44 pm

flynnjs wrote:3rd batch are now fully dispatched.
Mine just arrived. Big thumbs up. :-)
"A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams, Mostly Harmless.

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BeebMaster
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Re: BeebSCSI mini

Post by BeebMaster » Thu Apr 12, 2018 7:52 pm

Mine arrive too, thanks to Jason. Just figuring out how to work it now...
Image

stevei2791
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Re: BeebSCSI mini

Post by stevei2791 » Thu Apr 19, 2018 10:36 pm

Could i be added to the list for the 4th production run if there is one thanks

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flynnjs
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Re: BeebSCSI mini

Post by flynnjs » Sat May 05, 2018 3:36 pm

There are 9 more, ready to go out this week as I've hand soldered up the loose boards I had.
I really do have no more then.

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1024MAK
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Re: BeebSCSI mini

Post by 1024MAK » Sat May 05, 2018 4:40 pm

By my count there is enough for the members that have asked recently in this thread.
As I am also interested in one, I have just placed an order for one.

If however someone who has asked for one losses out and they don't already have one, I'll sacrifice mine.

I've just sent PMs to ask_nz, bear, bitseeker, Ottly and stevei2791 so that they can respond quickly.

Mark
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ask_nz
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Re: BeebSCSI mini

Post by ask_nz » Sun May 06, 2018 7:36 pm

Hi, I've ordered :)

Cheers

Ade
Ade

alienkidmj12
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Re: BeebSCSI mini

Post by alienkidmj12 » Tue May 08, 2018 12:35 pm

any of these left

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1024MAK
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Re: BeebSCSI mini

Post by 1024MAK » Tue May 08, 2018 12:39 pm

Yes, but only 2.

Mark
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danielj
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Re: BeebSCSI mini

Post by danielj » Tue May 08, 2018 1:07 pm

alienkidmj12 wrote:any of these left
These are functionally identical to the one you bought from me, just smaller so will plug directly into the 1MHz bus port under the beeb.

d.

Budgie
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Re: BeebSCSI mini

Post by Budgie » Tue May 08, 2018 11:05 pm

Hi,

I’ve just ordered one.

Thanks

Andy

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flibble
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Re: BeebSCSI mini

Post by flibble » Tue May 22, 2018 6:21 pm

Does anyone know of a source of 34way M to F ribbon cables? I want to fit mine inside my master.

RobC
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Re: BeebSCSI mini

Post by RobC » Tue May 22, 2018 7:21 pm

flibble wrote:Does anyone know of a source of 34way M to F ribbon cables? I want to fit mine inside my master.
I fitted the 34-way version of these to an old floppy cable.

cervaro
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Re: BeebSCSI mini

Post by cervaro » Sat May 26, 2018 7:30 pm

Anywhere to source these from at present. They look an interesting option.

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danielj
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Re: BeebSCSI mini

Post by danielj » Sat May 26, 2018 8:16 pm

There's a new pcb released:
https://github.com/simoninns/BeebSCSI

No one's producing them at the moment afaik, but it's completely open source if you'd like to knock a few together.

d.

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daveejhitchins
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Re: BeebSCSI mini

Post by daveejhitchins » Sun May 27, 2018 7:13 am

This is a cased BeebSCSI mini for the AP5 - I'll post the .stl files later.
IMG_2409.jpg
The small slot is for the power cable
IMG_2408.jpg
IMG_2407.jpg
Dave H :D
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Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

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simoni
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Re: BeebSCSI mini

Post by simoni » Sun May 27, 2018 8:24 am

This is a cased BeebSCSI mini for the AP5
Looks nice :) But you do realise that the new 7_7 board supports the 'Dave Hitchins' configuration now? :) 12mm clearance height is all it needs:

BeebSCSI 7_7 -  RA Configuration.jpg

Edit: You can also have the microSD card poking out the case as the new board is designed with cases in mind.

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daveejhitchins
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Re: BeebSCSI mini

Post by daveejhitchins » Tue May 29, 2018 7:12 am

simoni wrote:
Sun May 27, 2018 8:24 am
This is a cased BeebSCSI mini for the AP5
Looks nice :) But you do realise that the new 7_7 board supports the 'Dave Hitchins' configuration now? :) 12mm clearance height is all it needs:


BeebSCSI 7_7 - RA Configuration.jpg


Edit: You can also have the microSD card poking out the case as the new board is designed with cases in mind.
Yes, I realise all the above, however, I have a number of Jason's boards to use first - and now I'm getting to grips with Fusion 360 it will be easy to modify or start afresh a new case.

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

aotta
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Re: BeebSCSI mini

Post by aotta » Thu May 31, 2018 8:03 pm

oh no... another great project i found just after last board is sold?? :roll:

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danielj
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Re: BeebSCSI mini

Post by danielj » Thu May 31, 2018 8:18 pm

Aotta - the entire design is open:

https://github.com/simoninns/BeebSCSI

No one's making them at the moment - if you wanted to put a batch of 10 together, you'd probably be able to shift them all?

d.

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Re: BeebSCSI mini

Post by aotta » Thu May 31, 2018 8:27 pm

i love solder and working over old pcbs, but this new one boards need solder point too little for my eyes... i can give a try for myself, but not intend to project a batch for reselling: i will probably burn more component than i will be able to place!

If someone else is interested, perhaps we can create a group for ordering togheter a batch of empty pcbs

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danielj
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Re: BeebSCSI mini

Post by danielj » Fri Jun 01, 2018 5:15 am

Use jlcpcb.com, you can get 10 PCBs for $2+shipping!

d.

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simoni
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Re: BeebSCSI mini

Post by simoni » Fri Jun 01, 2018 5:37 am

To remove any guesswork, I've included the manufacturing specs for the PCB on the project pages (these match JLCPCB's options):

https://www.domesday86.com/?page_id=409 ... nformation

There's a bill of materials on the page also.

For soldering the board together (with a normal soldering iron) I'd recommend you use an iron with around 65W power - use a 1.5mm tip for all the 0805 components and AVR and a 0.4mm tip for the CPLD. The smaller tip for the ICs lets you easily remove any solder bridges between the pins. I usually just run the solder along the pins, use 2mm desoldering braid to remove the excess and then check for and remove any remaining bridges with the small tip. As long as you use plenty of flux it's a pretty easy process.

The new 7_7 board is designed to make hand-construction much easier. It also has fiducials to allow pick and place assembly... so you could even get the board house to populate the boards for you.

aotta
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Re: BeebSCSI mini

Post by aotta » Fri Jun 01, 2018 5:47 am

Thank danielj and simoni, great hints, specially the site for ordering pcbs... For smallymouse pcb last time i spent about 30£! I will place orders for board and components today!

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danielj
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Re: BeebSCSI mini

Post by danielj » Fri Jun 01, 2018 7:30 am

If you're in no rush, I've used airmail with jlc and it turns up in about 2 weeks in the UK :)

(I think the mosfet is the fiddliest of all the things on there!)

d.

aotta
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Re: BeebSCSI mini

Post by aotta » Sat Jun 02, 2018 1:09 pm

danielj wrote:
Fri Jun 01, 2018 7:30 am
If you're in no rush, I've used airmail with jlc and it turns up in about 2 weeks in the UK :)

(I think the mosfet is the fiddliest of all the things on there!)

d.
i can wait and just ordered the pcb from jlc... and adding components to my farnell basket but... considering the minimun quantity for each component, it's already over the 50 pounds plus p&p, and counting... :roll:
DIY one pieces only seem an expensive solution

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simoni
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Re: BeebSCSI mini

Post by simoni » Sat Jun 02, 2018 1:28 pm

DIY one pieces only seem an expensive solution
The BoM cost per board comes out at around 25 UKP a board depending on quantity (which isn't really that much ;) ); whichever way you do it, making several requires some investment. Single quantities are more costly, as are distributors like Farnell. The most cost effective way is with patience (so you can order from further away) and quantity (10 at a time at least).

BeebSCSI isn't a turboMMC or IDE adapter... it's a highly capable SCSI-1 emulation and analysis device with a lot of capability (it was originally designed to help reverse-engineer Domesday). On the plus side it is exactly like using the original Winchester systems from Acorn, so it's compatibility is second-to-none. The whole design and source is also open; for other (less capable) solutions you have to pay more than twice as much; most of which is just profit - BeebSCSI itself is totally free :)

aotta
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Re: BeebSCSI mini

Post by aotta » Sat Jun 02, 2018 1:54 pm

i use turboMMC with my compact, but i must admit that i am fallen in love reading about beebscsi project...
as said, just ordered the pcb, but closed farnell page (italian ones) when prompting me a checkout of over 70 euros with tax and postage...
i need save some money for restoring an A4000 (with battery leaked) i just bought, and adding an ide interface to my A3000 (but, there is a way to use beebSCSI with the A3000? maybe with a serial minipodule that adds the userport?) so, for the moment, i go in standby.
Maybe i will buy some components during next months, perhaps someone with more skill will make some new batch, we never know.. :wink:
Anyway, my compliments for the incredible works in domesday86 project!

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simoni
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Re: BeebSCSI mini

Post by simoni » Sat Jun 02, 2018 2:03 pm

but, there is a way to use beebSCSI with the A3000?
Well, BeebSCSI is two things... An Acorn SCSI-1 host adapter (well, 3 things - since it's also an AIV SCSI adapter) and a SCSI-1 drive emulator. The SCSI-1 drive emulator is probably quite universal, but the host adapter isn't really suitable for anything other than a Beeb.

It's probably a lot simpler just to use an IDE drive; but, having said that, it's all open-source, so you are free to hack it to do anything you like. Personally I have no plans to support any of the 24/32 bit machines with it.
Anyway, my compliments for the incredible works in domesday86 project!
Thanks! :)

alienkidmj12
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Re: BeebSCSI mini

Post by alienkidmj12 » Tue Jun 19, 2018 6:20 pm

is someone selling these? any left ?

ignore me, i already have 7.5 rev
Last edited by alienkidmj12 on Tue Jun 19, 2018 6:22 pm, edited 1 time in total.

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