Search found 752 matches

by flynnjs
Thu Dec 07, 2017 10:18 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Done!

All 40 units assembled, tested and either posted or are in a jiffy bag and labelled to go.

Thanks for everyone's support and patience.

I have a couple more empty PCB panels and will do a batch if there is sufficient interest
to do a whole panel (15).
by flynnjs
Thu Dec 07, 2017 5:46 pm
Forum: hardware
Topic: BBC Micro: writes to ROM?
Replies: 10
Views: 358

Re: BBC Micro: writes to ROM?

As a rule of thumb, unless a datasheet says that an output can survive a short then I would avoid it. As you draw more current the pin will gradually "let go" and eventually the voltage will no longer be within the valid voltage range for the connection standard (TTL/CMOS etc). Drawing yet...
by flynnjs
Thu Dec 07, 2017 8:22 am
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

The remaining 1MHz connectors arrived today so the remaining units will
be posted out tonight or tomorrow.
by flynnjs
Wed Dec 06, 2017 7:51 am
Forum: hardware
Topic: BeebSCSImini
Replies: 5
Views: 356

BeebSCSImini

A placeholder thread for people to raise any questions about the units that I'm posting out. To kick off: power . It needs power as no 5v is available on the 1MHz bus. The BeebSCSI mini has space for a three pin power connector. You will need to connect 5v to the centre of this and 0v to either/both...
by flynnjs
Sun Dec 03, 2017 6:23 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Shipping!

Thanks for everone's patience most of the first batch are out the door.
There are some which are awaiting the 1MHz bus connector to be soldered
on (I ran out of stock) and they will go out in the next day or two.
by flynnjs
Tue Nov 28, 2017 11:06 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

First 30 boards tested and programmed.
They just need the right angle connecter put on an popped in the post.
by flynnjs
Tue Nov 28, 2017 7:56 am
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Getting closer:
IMG_20171128_075034.png
by flynnjs
Thu Nov 23, 2017 10:26 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Status update : Parts are loaded onto the pick and place machine.
I should get most of the assembly done over the weekend and
then I'll start posting out next week. Sorry for the delay but the
day job has been a bit mental recently.
by flynnjs
Sun Nov 19, 2017 12:53 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

Er.... maybe I'll just cut and strap my mini board to be the same as the ones everyone else has... ?
by flynnjs
Sun Nov 19, 2017 12:37 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

I note the latest MCS file for the LX9 mini board supports the UART on pins 51/55
where my board has it on 46/47. So I have a booting board but no UART right now :-)

[EDIT] As Phill has his build environment set up he's spinning me a different version.
Thanks!
by flynnjs
Thu Nov 16, 2017 12:10 am
Forum: hardware
Topic: Arduino Filestore
Replies: 39
Views: 1408

Re: Arduino Filestore

I don't know anything about the SPI unit on Atmels but the MCU I was using only transferred multiples of 8-bits so external stuffing/unstuffing is required to make sure all frames in/out of the SPI are so. If you have the cycles to spare I'm sure you could do all this in an software every Econet clo...
by flynnjs
Tue Nov 14, 2017 10:01 pm
Forum: hardware
Topic: Arduino Filestore
Replies: 39
Views: 1408

Re: Arduino Filestore

The CPLD code basically bit stuffs (and unstuffs) so you can connect to an 8bit SPI port. Obviously as the Econet has a clock the CPLD is the master and the MCU is the slave. The code is very ugly with some extremely dubious async clock stuff going on to squeeze the functionality ouf of the 9500 whi...
by flynnjs
Tue Nov 14, 2017 4:58 pm
Forum: hardware
Topic: Arduino Filestore
Replies: 39
Views: 1408

Re: Arduino Filestore

That assumes that, without the 6854, you have some alternative form of serialise/deserialise logic (with at least a couple of bytes of FIFO) so that you can operate byte by byte rather than bit by bit. That's exactly what I have in mind (using a small CPLD to handle clocking bits onto and off the w...
by flynnjs
Mon Nov 13, 2017 9:31 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

The PCBs have arrived so I shall now start construction.
I do not expect them to ship before ABUG so it will be next week now.
Thanks for everyone's patience.
by flynnjs
Thu Nov 02, 2017 7:22 am
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Just a quick update, I'm *still* waiting for the PCBs to arrive so construction hasn't
begun yet. I'm assured they are on their way. I'll send an update when they do arrive
and dispatch will be about a week after that.
by flynnjs
Mon Oct 23, 2017 8:53 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

The intention always was to have the pullups the same side as the pins and the ICs leaving the other side purely for strapping pings high or low. However, you had one of the early board which for some reason I put the resistors on the other size. All new boards shipped since last week have the inten...
by flynnjs
Mon Oct 23, 2017 6:22 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1203
Views: 84707

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

Reminds me, I've seen lots of funnys with IDE cables that have been repurposed, including
it working with the cable one way around but not the other, I kid you not!
I too would recommend your testing with it directly connected under the keyboard
rather than using a ribbon.
by flynnjs
Mon Oct 23, 2017 6:15 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

The other thing is the pull-ups on one board are in on the other side to the other board.
This shouldn't make any difference.
by flynnjs
Mon Oct 23, 2017 6:13 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

fordp wrote:I am pretty sure Jason did that for me.


Actually, it was probably configured for the power jumpers CLOSED as I was not connecting the USB
so it needed power from the Beeb.
by flynnjs
Sun Oct 22, 2017 6:10 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1203
Views: 84707

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

You can return it for a bitware downgrade to see if that helps.
by flynnjs
Sun Oct 22, 2017 5:43 pm
Forum: acorn atom
Topic: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 1203
Views: 84707

Re: Matchbox sized 6502 / Z80 / 6809 Co Pro

Peter's green board has all the required extra capacitors on it. Only the red boards need extra caps added. The only difference with this one is it is the first I have sent out with Dave's latest bitware (there is a better word then firmware! ) : LX9CoProCombined_20171007_0719_dmb I did test this br...
by flynnjs
Thu Oct 19, 2017 9:38 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

1024MAK wrote: is there a way to save on postage?


I'll have a few with me at the ABUG meet in November.
by flynnjs
Sun Oct 15, 2017 11:06 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Indeed. And another 10 added.

With this demand, I've had to make some tweaks to the PCB layout to make them quicker/easier to construct.
by flynnjs
Mon Oct 09, 2017 5:37 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Even I was surprised. I've added another 10 on the shop.
by flynnjs
Mon Oct 09, 2017 5:36 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

1024MAK wrote:The price of 0.00 is fine for me! :lol:. So I've ordered one :mrgreen:


Line on order cancelled [-X

Price corrected
by flynnjs
Sun Oct 08, 2017 7:10 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 101
Views: 5821

Re: BeebSCSI mini

Sorry for the delay, I've now made them available on my store webpage.
by flynnjs
Sun Oct 08, 2017 7:09 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

fordp wrote:Any news. I would like to get started on my 6502 diagnostic tool!


Now available on my store webpage.
by flynnjs
Wed Sep 20, 2017 6:34 am
Forum: for sale / freebies
Topic: Worth Taking a Look At
Replies: 2486
Views: 181320

Re: Worth Taking a Look At

JimQ wrote:They've not got solution for the scam where somebody pays with Paypal, collects the item and then a few weeks later files a item not received claim.


I just ask people to log on and mark as received before they leave with the item.
by flynnjs
Thu Sep 14, 2017 6:31 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

fordp wrote:I hope I can get a level shifter ;)


I'm back in circulation now so I'll get some of those on the webshop at the weekend (along with some BeebSCSI-minis too)
by flynnjs
Thu Aug 10, 2017 6:49 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 615
Views: 30788

Re: ICE T65/Z80/6809

You could, in principle, design a generic form of such an adapter, but the direction and output enable of each pin would need to be individually settable. This needs 2x, possibly 3x, the number of FPGA I/Os. I think even Jason gave up at this point! Dave You can do it as a custom board but there ar...

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