Today I built ...

on-topic Acorn-related news and discussions not covered by the other forums
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hoglet
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Re: Today I built ...

Post by hoglet » Sat Nov 24, 2018 6:05 pm

Today I built something for my Atom...
IMG_1486.JPG
IMG_1487.JPG
IMG_1490.JPG
It works rather well. :D

Dave

bprosman
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Re: Today I built ...

Post by bprosman » Sat Nov 24, 2018 6:12 pm

Very interested in your posts about it Dave and see it working.

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oss003
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Re: Today I built ...

Post by oss003 » Sat Nov 24, 2018 8:51 pm

HDMI output for the Atom ...... 😳

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jonb
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Re: Today I built ...

Post by jonb » Mon Nov 26, 2018 12:44 pm

That is pretty cool, Dave. Nice one!

For my part I built a mystery device:


IMG_5053.jpg
Black sandwich anyone?
IMG_5049.jpg
Reset key, SD card slot (with card)
IMG_5050.jpg
VGA, PS/2 keyboard, Serial ports
IMG_5051.jpg
Power input & flat programming cable

There is a way to go yet. I have a RTC to fit and 1Mb of 10ns memory (it has 128k 50ns at the moment). But what is it?

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Re: Today I built ...

Post by bprosman » Sat Dec 01, 2018 6:06 pm

Today I built a Godil adapter.

Having a "stubborn" 6502 and a Z80 machine "under construction" I was heavily interested in Dave/Hoglet's ICE-Txx.
Unfortunately the original Godil is not available anymore but the 2x50IDC connector version is :

https://shop.trenz-electronic.de/en/TE0 ... n-IDC?c=97

Having been in contact quite a lot over the last weeks with Dave I initially wanted to use my E-Pizza board instead together with Dave's level-shifter board.
https://www.ebay.com/itm/Xilinx-FPGA-Sp ... 1640406811?

This board still needs some work and I will continue this but as a plan B. For now I went for a "Quick and dirty" adapter board.
Using a SMD 40 IC socket, a pin-pin socket and an additional "normal" IC socket. The last one is just for protection of the pin-pin socket, in case a pin breaks its easy to replace. On the last picture it's jumpered for a 6502.
Godil_Adapter_Top.JPG
IMG_7663.JPG
IMG_7667.JPG
IMG_7668.JPG
IMG_7670.JPG

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1024MAK
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Re: Today I built ...

Post by 1024MAK » Sun Dec 02, 2018 10:47 am

bprosman wrote:
Sat Dec 01, 2018 6:06 pm
Today I built a Godil adapter.
Nice 8)
=D>

Mark

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1024MAK
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Re: Today I built ...

Post by 1024MAK » Sun Dec 02, 2018 10:47 am

jonb wrote:
Mon Nov 26, 2018 12:44 pm
For my part I built a mystery device:

...

But what is it?

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hoglet
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Re: Today I built ...

Post by hoglet » Sun Dec 02, 2018 11:21 am

bprosman wrote:
Sat Dec 01, 2018 6:06 pm
Today I built a Godil adapter.
This is really nice. Do you have it working yet?

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oss003
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Re: Today I built ...

Post by oss003 » Sun Dec 02, 2018 11:22 am

Looking good Bram, did you already test it?

Greetings
Kees

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jonb
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Re: Today I built ...

Post by jonb » Sun Dec 02, 2018 12:39 pm

1024MAK wrote:
Sun Dec 02, 2018 10:47 am

But what is it?
Nice clip Mark.

It's one of these: http://searle.hostei.com/grant/Multicomp/ mated to one of these: https://www.retrobrewcomputers.org/doku ... ii-c:start running one of these: http://obsolescence.wixsite.com/obsoles ... -demo-disk.

In essence, a CP/M box overclocked to 33Mhz with SD card and VGA+PS2 I/O (or RS-232 @ 115200 baud). The case is made from black plastic standoffs and a couple of bits of 12x12cm matte perspex. I'm going to fit 1MB of fast RAM and see if I can get it to 100Mhz.
Last edited by 1024MAK on Sun Dec 02, 2018 5:21 pm, edited 2 times in total.
Reason: Edit URL tags

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Re: Today I built ...

Post by bprosman » Sun Dec 02, 2018 3:00 pm

@Hoglet, Kees,

Will test it on my "minimum Atom" later this week. Still need to flash the right image in it, its a 500K Version.

Need to check which one that is on Github <hint> :wink:

Regards, Bram

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hoglet
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Re: Today I built ...

Post by hoglet » Sun Dec 02, 2018 3:12 pm

bprosman wrote:
Sun Dec 02, 2018 3:00 pm
Need to check which one that is on Github <hint> :wink:
There should be a binary release you can use:
https://github.com/hoglet67/AtomBusMon/releases

The version you need in the ZIP is:
ice_20170922_2245_073\godil_500\ice6502\ice6502.mcs

(That's assuming your adapter maintains the original GODIL pinout)

Dave

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Re: Today I built ...

Post by bprosman » Sun Dec 02, 2018 3:36 pm

(That's assuming your adapter maintains the original GODIL pinout)
Yes it does, took it from the original schematic. Thanks !

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1024MAK
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Re: Today I built ...

Post by 1024MAK » Sun Dec 02, 2018 5:23 pm

jonb wrote:
Sun Dec 02, 2018 12:39 pm
It's one of these: http://searle.hostei.com/grant/Multicomp/ mated to one of these: https://www.retrobrewcomputers.org/doku ... ii-c:start running one of these: http://obsolescence.wixsite.com/obsoles ... -demo-disk.

In essence, a CP/M box overclocked to 33Mhz with SD card and VGA+PS2 I/O (or RS-232 @ 115200 baud). The case is made from black plastic standoffs and a couple of bits of 12x12cm matte perspex. I'm going to fit 1MB of fast RAM and see if I can get it to 100Mhz.
Nice, especially how you have fitted them neatly together =D>

Mark

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jonb
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Re: Today I built ...

Post by jonb » Mon Dec 03, 2018 8:26 am

Thanks, Mark. I used the following items to build the "enclosure" as I couldn't find a real enclosure that looked good enough. I wanted something low profile with removable front / rear panels but there's nothing out there that isn't very expensive..
Total cost about £14 but there are spare feet and spacers.

A black steel mesh wrapped around it would be really pretty and make a true enclosure, if it was accurately shaped and invisibly fixed using the stays.

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Re: Today I built ...

Post by Ramtop » Mon Dec 03, 2018 6:03 pm

Two examples of my new development board for the Elk. EPROM, SRam and Flash sockets, 20 I/Os, and an SD card interface.

I built these last week, but was too lazy to take pictures until today :D
Attachments
esx1a.jpg
Gary

cmorley
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Re: Today I built ...

Post by cmorley » Sun Jul 14, 2019 3:19 pm

Voltage regulator on... no it is not the 3 pin device that is a diode - look closer!
Photo0595.jpg
27C400/27C800 EPROM/ROM emulator

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Re: Today I built ...

Post by cmorley » Sun Jul 14, 2019 5:14 pm

And assembled... not fully cleaned though. I need to attach some wires to this one for the STM32 ARM processor debug port to develop the software.
Photo0601.jpg
Photo0602.jpg

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marcusjambler
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Re: Today I built ...

Post by marcusjambler » Mon Jul 15, 2019 10:57 am

Oooh... Whats this one chris?

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Re: Today I built ...

Post by cmorley » Mon Jul 15, 2019 11:39 am

marcusjambler wrote:
Mon Jul 15, 2019 10:57 am
Oooh... Whats this one chris?
It is a prototype for an 27C400/27C800 EPROM emulator. I have a big dev board running fine already.

It has a big FLASH so 4x 27C400 images can be loaded and switched between. Program via USB. 27C400 is 16 bit but I support the _BYTE pin for true 8 bit operation. Then with an adapter it could be used in any 8-bit machine e.g. Master MOS ROM

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