Search found 820 matches

by flynnjs
Sun Oct 15, 2017 11:06 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 168
Views: 20467

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: 168
Views: 20467

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 and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

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: 168
Views: 20467

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 and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

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: 2794
Views: 281227

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 and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

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 and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

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...
by flynnjs
Tue Aug 08, 2017 12:58 pm
Forum: hardware
Topic: 68B54 emulation = wifi enabled Master
Replies: 23
Views: 2497

Re: 68B54 emulation = wifi enabled Master

Compare I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy check CS read data bus with I'm busy I'm busy I'm busy I'm busy I'm busy INTERUPT! read data bus I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy I'm busy Depends on the architecture. Some take lo...
by flynnjs
Tue Aug 08, 2017 12:35 pm
Forum: hardware
Topic: 68B54 emulation = wifi enabled Master
Replies: 23
Views: 2497

Re: 68B54 emulation = wifi enabled Master

Seems an odd way to attempt it as interrupts usually add latency.
Not only have you got very few cycles but you potentially have to make
decisions on whether it's a read or write and change the direction of
the lines too. This sort of stuff has been done before but using fast
clock RISC devices.
by flynnjs
Thu Aug 03, 2017 1:54 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

I think I used 1k5 which is what's in use on the GODIL.
by flynnjs
Wed Aug 02, 2017 7:54 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Jason / Mark, do you you agree with this? Dave Yes, the idea is to jumper the power from the DIP to the pull-ups. The extra jumpers allow a switch to be connected to allow the FPGA to run when not USB powered, obviously no use for ICE work but there are other stand alone applications. You are right...
by flynnjs
Sat Jul 29, 2017 5:59 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Do you mean Duncan?

Here's the user guide for the board I have.
XC6SLX9 Mini Board-User's Guide.pdf
(3.15 MiB) Downloaded 36 times
It has an FT232 on it, not an FT230.

Mine looks just like this : http://www.ebay.com/itm/Xilinx-FPGA-Spa ... 1640406811
by flynnjs
Sat Jul 29, 2017 9:00 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

When I get back to my PC I'll post the 6502 bit file to try. Remember not to test this with it strapped as z80 or you might cause damage.
by flynnjs
Thu Jul 27, 2017 9:14 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Aha, I did tweak the DCM....
DCM0.zip
(788 Bytes) Downloaded 54 times
by flynnjs
Thu Jul 27, 2017 9:08 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Two things spring to mind:
1) The FTDI is a clone and the Windows driver has nuked it.
2) What is the idle polarity of the TX and RX ? You may need to use FT_PROG to invert the sense.

I don't remember playing with the DCM, but I've been asleep since Jan '16 !
by flynnjs
Thu Jul 27, 2017 8:12 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Just to be clear, the ucf I posted was for 6502 on the mini board not z80.
Should be fairly obvious from the signal names.
I've not used my adapter board for anything than a quick test in 6502 mode.
by flynnjs
Thu Jul 27, 2017 6:53 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

Try running a team of people some on ISE, some on Vivado with a mixture of subscription levels and extra options. Throw into the mix a few PC upgrades requiring rehosting to new MAC addresses and all gets a bit of a mess. Unfortunately, the new board I'm working on has a much newer device and will r...
by flynnjs
Wed Jul 26, 2017 6:23 am
Forum: hardware
Topic: Beeb WiFi SD Card
Replies: 9
Views: 1339

Re: Beeb WiFi SD Card

I did on the datacentre but the same trick doesn't work on BeebSCSI as it doesn't
access the card in the same way.
by flynnjs
Tue Jul 25, 2017 10:18 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 168
Views: 20467

Re: BeebSCSI mini

Not updated yet. Will be doing that at the weekend and putting on the NOS floppy drives that I mentioned a while back too.
by flynnjs
Tue Jul 25, 2017 10:17 pm
Forum: hardware
Topic: Beeb WiFi SD Card
Replies: 9
Views: 1339

Re: Beeb WiFi SD Card

I did try one of the commercial ones in e BeebSCSI but they need to work in proper SD mode
not simple SPI mode (which is what the library BeebSCS uses supports) so no-go.
I would think fairly easy to knock up on an ESP8266 or similar.
by flynnjs
Tue Jul 25, 2017 10:11 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

I haven't seen how the level shift logic works on Godil. Both it and my shifter are basically a pull-up on the 5v side and a FET clamp. This means that it never drives above 3v3 which is OK for TTL (which is LVTTL compatible) but might not work correctly with CMOS. The other problem is software whi...
by flynnjs
Tue Jul 25, 2017 9:51 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

I *think* this might be the right .UCF ... sorry, it was a quick test and I went back to using my GODIL afterwards ... :oops:
by flynnjs
Sat Jul 22, 2017 7:00 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 168
Views: 20467

Re: BeebSCSI mini

OK, up to ~20 people now so I'll mark them back in stock on the webshop.
They will be PREORDER as I need to get some more PCBs which will take
some time. Also I have a busy summer so I expect dispatch around mid
September.
by flynnjs
Sat Jul 22, 2017 6:48 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

@Mark I meant zero Ohm.
by flynnjs
Fri Jul 21, 2017 6:54 am
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 786
Views: 67387

Re: ICE T65/Z80/6809

I knew the adapter board was a pre-emptive strike but I didn't know what the latency would be :mrgreen: I have about 15 more PCBs left from the initial batch. I dont think I have any of the level shifters out there. What I really need is a source of the right-angle pin header as is used on the under...
by flynnjs
Thu Jul 06, 2017 6:38 am
Forum: for sale / freebies
Topic: Offered: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 603
Views: 74033

Re: Offered: Matchbox sized 6502 / Z80 / 6809 Co Pro

Last couple of these available on the webshop now. Once these have gone then
there won't be another batch, even hand built.
by flynnjs
Thu Jul 06, 2017 6:35 am
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 168
Views: 20467

Re: BeebSCSI mini

Since ADFS will take quite a bit of resources on a model B I take it that BeebSCSI is mostly targetted for the Master. I fitted one of these to my B+ (in a 32KB socket) and installed DFSE00 and ADFSE00: https://datasheets.maximintegrated.com/en/ds/DS1230AB-DS1230Y.pdf You could do the same in a mod...
by flynnjs
Mon Jul 03, 2017 7:04 pm
Forum: for sale / freebies
Topic: BeebSCSI mini
Replies: 168
Views: 20467

Re: BeebSCSI mini

I shall do another batch but I need to gauge interest, so I'll run a list here for a week or so.
by flynnjs
Mon Jun 19, 2017 4:35 pm
Forum: hardware
Topic: Acorn IC die shots
Replies: 4
Views: 821

Re: Acorn IC die shots

dp11 wrote:The top one doesn't really have enough pads to be anything from the Archimedes I don't think.
I guess, as Ed said, only 27 pads. Seems quite high density and too irregular to be a ULA.
Did Master/Compacts every have anything full ASIC?