Search found 37 matches

by obiwanjacobi
Sun May 17, 2020 8:33 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Hmm, I guess you always run the risk of ebay/ali products not being available at any time. If you want to provide consistency you have to make one yourself (can be a copied design) with still available parts for a reasonable price. Bonus is that you can integrate level shifting and make the EEPROM b...
by obiwanjacobi
Sun May 17, 2020 7:02 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

That last one should be usable, it has USB. Perhaps redefine the pin mappings...

BTW: what is the issue with the EEPROM? I found it (M25P80-VMW6) on ebay: 10 for 7 euros.
https://www.ebay.com/itm/10pcs-ST-M25P8 ... 2535498277
by obiwanjacobi
Sat May 16, 2020 4:22 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Playing with the idea of making a clone but sourcing of the EEPROM used on the board is scaring me off a bit. You can make a totally new design. You only need the power supplies, a way to program the FPGA (JTag conn) and storage for its config. You could even add the level shifting to the same boar...
by obiwanjacobi
Wed May 06, 2020 1:10 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

In hindsight totally understandable.
Anyway, thanks and sorry for bothering you with this non-issue. :roll:
by obiwanjacobi
Wed May 06, 2020 10:24 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Yes, I've reread those posts - and now I am getting ***memory timeout*** :shock: I have tried with clock frequencies from around 1MHz up to 12MHz (ball-park: not very accurate)... All with the same result. I have measured continuity from my IDC-DIP cable (the pins I plug into the socket on my board)...
by obiwanjacobi
Wed May 06, 2020 10:18 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Yes, I've reread those posts - and now I am getting ***memory timeout*** :shock: I have tried with clock frequencies from around 1MHz up to 12MHz (ball-park: not very accurate)... All with the same result. I have measured continuity from my IDC-DIP cable (the pins I plug into the socket on my board)...
by obiwanjacobi
Wed May 06, 2020 9:05 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Hi,

After a long break I am at it again.
I'm getting "missing clock" again, though I do provide a 1MHz clock...? same result up to around 8MHz.
I measured the click pin (6) and it IS there.
I remember last time I had it working...
(v0.982/Jan 28 2020)
by obiwanjacobi
Fri Jan 31, 2020 2:04 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Thanks Bram. Currently my VM works fine so I will be trying that for the time being, but it's good to have this documented. Did any of you managed to download the eepizza FPGA board documentation? There was mention of it in the item's description but no download link... Edit=> https://www.dropbox.co...
by obiwanjacobi
Fri Jan 31, 2020 8:12 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Sorry to have bombarded you with all these questions and problems, Dave. I really appreciate the help I am getting and your patience to answer all this gibberish... :mrgreen: No worries, glad to see you are making prositive progress, Looks like my wait-for-BusAck bug was the issue. After some more ...
by obiwanjacobi
Wed Jan 29, 2020 7:30 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Makes sense, thanks. I checked continuity from the LV 245 buffer outputs to the DIP 40 socket on my Adapter after I fixed some less-than-ideal solder joints. And rechecked continuity on the socket-to-socket ribbon cable I made. It all checks out ok. I found a software bug in my System Controller cod...
by obiwanjacobi
Wed Jan 29, 2020 6:08 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

What is ***memory timeout**** ? ICE-Z80 In-Circuit Emulator version 0.982 Compiled at 12:11:21 on Jan 28 2020 8 watches/breakpoints implemented Tracing every 1 instructions while single stepping CPU free running... Interrupted 00.000000 : 0000 : 00 : NOP *** memory timeout *** >> m 0 0000 00 00 00 0...
by obiwanjacobi
Wed Jan 29, 2020 4:06 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

If you want to to test the RD/WR/IORQ/MREQ pins really are tristated, then you probably need to setup the ICE on a breakboard (with power and a clock). Pull the databus down to 0V with 8x 10K resistors (so it runs NOPs). Tie the other control inputs as appropriate. Then use something like 22K resis...
by obiwanjacobi
Wed Jan 29, 2020 4:02 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Thought: Is there an Adapter Test image I can load into the FPGA? Just to make sure that the soldering of the adapter board is correct etc. Something like: output a lowish clock signal on each pin and use a button to cycle through the pins. Something you can test on breadboard with a logic pen or a...
by obiwanjacobi
Wed Jan 29, 2020 2:13 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Thought: Is there an Adapter Test image I can load into the FPGA? Just to make sure that the soldering of the adapter board is correct etc. Something like: output a lowish clock signal on each pin and use a button to cycle through the pins. Something you can test on breadboard with a logic pen or a ...
by obiwanjacobi
Wed Jan 29, 2020 10:24 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

OK noob mistake #-o The ribbon cable between the Xilinx Platform Cable USB II programmer and the eepiza Spartan 6 board was the problem. (so much for double checking) The connector (of the ribbon cable) that connects to the programmer was up-side-down (left-side-right). Perhaps good to include this ...
by obiwanjacobi
Wed Jan 29, 2020 9:17 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Do I need to put the eepizza Spartan6 board in a specific mode for (re)programming? Because I get JTag (initialize chain) errors. [...] loads more [...] ---------------------------------------------------------------------- '27': : Manufacturer's ID = Unknown INFO:iMPACT:501 - '1': Added Device UNKN...
by obiwanjacobi
Tue Jan 28, 2020 8:16 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Hi Obiwan, I think I'll wait for your fix then try again. I've just uploaded a new release package that fixes the Z80 address/data bus tristate during reset issue: https://github.com/hoglet67/AtomBusMon/releases/tag/release_3 The firmware revision number is now 0.982. Dave Sweeeeet! Thanks. Meanwhi...
by obiwanjacobi
Mon Jan 27, 2020 2:47 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Lowering R53 could help it start better...? Put another R parallel to it... [2c]
by obiwanjacobi
Sun Jan 26, 2020 2:18 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I think I'll wait for your fix then try again.
Images are attached.
by obiwanjacobi
Sun Jan 26, 2020 11:06 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I went back to the bread board. Got the clock from my Z80 system (no more missing clock). I can see a difference with how RESET is handled. The Z80 puts its Address and Data bus in hi-Z and the control signals in inactive-state. The ICE keeps the address lines hard-low. I toggle RESET (long time per...
by obiwanjacobi
Sat Jan 25, 2020 6:48 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I assembled my Z80 rig and tested out the ICE. I only had time for a quick test run. This is what I have found so far: At higher clock settings I do not get the 'missing clock' message any more. I loaded a 'hello world' test program that I first tested with the real Z80 in there, just to make sure i...
by obiwanjacobi
Wed Jan 22, 2020 6:34 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

There is handshaking in the hardware to ensure commands from the AVR core to the Bus Monitor logic are not lost, and this handshaking involves the target system clock. If this clock is too slow, a timeout will occur in the AVR software, which is fed back to the user as a "Clock Missing" error. [......
by obiwanjacobi
Wed Jan 22, 2020 11:02 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I have used the Z80 bitstream and Adapter assembly instructions (only populated R11 for instance). I am only interested in the Z80 at this time. After some testing it keeps complaining about a 'missing clock'. Not sure how fast my clock actually is but it is running. In this mode it also keeps runni...
by obiwanjacobi
Tue Jan 21, 2020 7:25 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I have assembled Dave's Adapter Board last evening and encountered no problems. The description was clear - I think I made no mistakes (famous last words) For vNext of the board it might be an idea to make the pads for the (reversed) Z80 DIP40 socket twice as long - that way a normal DIP40 socket wi...
by obiwanjacobi
Fri Jan 17, 2020 5:16 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Update: One idea to consider... 1 - use my existing adapter board and on the bottom mount a 40-pin SMT DIP socket, like one of these . 2 - make up a short cable with a pair of 40-pin IDC 0.6" DIP Headers and some 40 pin IDC cable. These are hard to find, but do exist. 3 - solder a second CPU socket ...
by obiwanjacobi
Thu Jan 16, 2020 6:35 pm
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Totally worked. Thank you very much. Had no troubles with Windows. You get a Linux VM that contains the Xilinx programs and can point to a share folder for host file transfer. I programmed the 'Dave' board for the Z80 - figured this would be the one having gotten the adapter board from Dave... Now i...
by obiwanjacobi
Thu Jan 16, 2020 8:24 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

I just want to use the images/binaries from the github release.

Changing his code and programming that comes much later :lol:

The first look at Impact was pretty .... daunting...
by obiwanjacobi
Thu Jan 16, 2020 8:05 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Right, that should be 14.7 indeed and I run on Windows (tried Linux too but that crashed) - and yes it is the EEPizza board.
I have that programmer as well - so that means the USB on the EEPizza board is for power only?

Any hints on how to use the software?
by obiwanjacobi
Thu Jan 16, 2020 7:24 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

Yeah! I finally got my Spartan6 board. Looks very nice. I just wanted some pointers on how to get the FPGA programmed. What I could figure out is that I need ISE 4.7 because that supports the Spartan6. I have that running on my machine now. Then I think I need the "Impact" program to program it..? N...
by obiwanjacobi
Fri Nov 22, 2019 6:26 am
Forum: acorn atom and acorn system series
Topic: ICE T65/Z80/6809
Replies: 960
Views: 88354

Re: ICE T65/Z80/6809

It works for me on Windows 10 now with some manual interventions. So wanted to try to setup an Ubuntu VM to make it more seamless. But in the end I can rebuild. Perhaps a good idea to document those manual steps (in the wiki)? Also, you might want to try the Windows Subsystem for Linux (WSL). With ...

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