ICE T65/Z80/6809

discussion of games, software, hardware & emulators relating to the Acorn Atom
bprosman
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Re: ICE T65/Z80/6809

Postby bprosman » Sun Sep 24, 2017 9:22 am

And where there :D :D :D
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hoglet
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Re: ICE T65/Z80/6809

Postby hoglet » Sun Sep 24, 2017 11:50 am

Have you connected it to a target system yet with your level shifters?

An Atom is ideal to start with, because it doesn't have regular timer interrupts. These really mess up the utility of single stepping on the Beeb, as you always end up in the interrupt handler. I don't yet have a good answer to that. Probably we need a command to disable interrupts while single stepping.

I'd be very interested in seeing of photo of how it has ended up.

Dave

bprosman
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Re: ICE T65/Z80/6809

Postby bprosman » Sun Sep 24, 2017 12:01 pm

Hi Dave,

Not yet, going to do that, will finished the level shifters today.
The Xilinx software and getting it too work was too addictive even though you provided compiled "ready to run" versions :D

Was wondering the max lenght of a flatcable from the level shifters to the 6502 socket.
Would one foot (30cm) be too abitious ?

Will post pictures.
Attached the schematic for now.

ICE-T-65 Wiring diagram V.01.pdf
(208.32 KiB) Downloaded 8 times


Kind regards, Bram

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hoglet
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Re: ICE T65/Z80/6809

Postby hoglet » Sun Sep 24, 2017 12:29 pm

bprosman wrote:Was wondering the max lenght of a flatcable from the level shifters to the 6502 socket.
Would one foot (30cm) be too abitious ?

I don't think there is a single answer to this, as so much will depend on how the target system is designed.

For example, a 1MHz Atom will probably have more timing margin than a 2MHz Beeb.

How easy is it to change the cable?

I would start with 15cm if that is possible. If that works well, then go longer.

Dave

bprosman
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Re: ICE T65/Z80/6809

Postby bprosman » Sun Sep 24, 2017 3:30 pm

Was just wondering, (and if I'm overlooking it, apologies but....) how hard it would be to Implement a sort of PoPi (PokePin) command, to set a certain output to 0, or to 1, this to test wiring and level shifters.

PePi (PeekPin) could be its counterpart.

Ideal would be the function name (e.g. PoPi A0 1 = set A0 to 1), or PePi D0 (read value of D0).
Or just the native name "PoPi IO_014 1" .

Just thinking out loud.

//Edit.. I see the code it written in .C, at least for me kinda understandable.

Kind regards, Bram

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hoglet
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Re: ICE T65/Z80/6809

Postby hoglet » Sun Sep 24, 2017 6:18 pm

bprosman wrote:Was just wondering, (and if I'm overlooking it, apologies but....) how hard it would be to Implement a sort of PoPi (PokePin) command, to set a certain output to 0, or to 1, this to test wiring and level shifters.

Space is pretty tight in some of the builds...that's the main issue.

If you want some way of testing this before plugging it into a system, setup a small circuit that feeds a 40 pin socket (for the ICE T65) with:
- power
- a clock
- a reset signal
- a value of EA (NOP) on the data bus (set with pull up/pull down resistors)
- also tie NMI/IRQ high

You should then be able to see the system reset and start executing at EAEA, and then see the address lines toggling as it whizzes through memory.

Or just put it in an Atom and try to read one of the ROMs.

There is a crc command that uses the well-known Atom CRC.

Dave

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flynnjs
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Re: ICE T65/Z80/6809

Postby flynnjs » Sun Oct 08, 2017 7:09 pm

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


Now available on my store webpage.

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fordp
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Re: ICE T65/Z80/6809

Postby fordp » Mon Oct 09, 2017 12:21 pm

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


Now available on my store webpage.


Looking on http://www.xeropage.co.uk :(

Is it the Level shifter : 5v DIP to 3v3 DE0-nano ?

Priced at 0.00 which seems a little cheap to me.
FordP (Simon Ellwood)
Time is an illusion. Lunchtime, doubly so!

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1024MAK
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Re: ICE T65/Z80/6809

Postby 1024MAK » Mon Oct 09, 2017 2:51 pm

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


Now available on my store webpage.


Looking on http://www.xeropage.co.uk :(

Is it the Level shifter : 5v DIP to 3v3 DE0-nano ?

Priced at 0.00 which seems a little cheap to me.

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

Mark
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki‬ - for answers to many questions...

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flynnjs
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Re: ICE T65/Z80/6809

Postby flynnjs » Mon Oct 09, 2017 5:36 pm

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

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1024MAK
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Re: ICE T65/Z80/6809

Postby 1024MAK » Mon Oct 09, 2017 6:16 pm

<serious mode> I never expected it to be free (I added it to my order yesterday before seeing the new posts in this thread today). I was wondering if you were going to ask for payment at a later stage.

I'm happy to put through another order, but if both the level shifter board and a BeebSCSI are being posted at the same time, is there a way to save on postage?

Mark

</serious mode>
For a "Complete BBC Games Archive" visit www.bbcmicro.co.uk NOW!
BeebWiki‬ - for answers to many questions...

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fordp
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Re: ICE T65/Z80/6809

Postby fordp » Tue Oct 10, 2017 7:08 am

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


Now available on my store webpage.


Looking on http://www.xeropage.co.uk :(

Is it the Level shifter : 5v DIP to 3v3 DE0-nano ?

Priced at 0.00 which seems a little cheap to me.


Ordered, thanks!
FordP (Simon Ellwood)
Time is an illusion. Lunchtime, doubly so!

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fordp
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Re: ICE T65/Z80/6809

Postby fordp » Wed Oct 18, 2017 11:53 am

fordp wrote:
fordp wrote:
flynnjs wrote:
Now available on my store webpage.


Looking on http://www.xeropage.co.uk :(

Is it the Level shifter : 5v DIP to 3v3 DE0-nano ?

Priced at 0.00 which seems a little cheap to me.


Ordered, thanks!

Arrived today, thanks :D
FordP (Simon Ellwood)
Time is an illusion. Lunchtime, doubly so!

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flynnjs
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Re: ICE T65/Z80/6809

Postby flynnjs » Thu Oct 19, 2017 9:38 am

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


I'll have a few with me at the ABUG meet in November.


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