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ALPHA USER BUILDS
Where Alpha builders can post pics and progress etc
Topics: 11

11 Topics

1445 Posts

Last post Re: R_J Progress
by rubber_jonnie View the latest post
Thu Feb 07, 2019 9:21 am
MONGREL EDITION (version 2)
New sub forum for version 2 of the STF remake board.
Topics: 16

16 Topics

177 Posts

Last post Re: exxos IDE interface (unte…
by exxos View the latest post
Tue Feb 12, 2019 1:08 pm

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ALPHA PARTS LIST

Last post by exxos « Wed Nov 07, 2018 11:32 pm
Replies: 26
by exxos » Fri Aug 03, 2018 10:15 pm
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No part numbers yet.. that will take a while to sort through, but mostly generic parts so should be easy to find anyway... but all the parts I think...
26 Replies

2366 Views

Last post by exxos
Wed Nov 07, 2018 11:32 pm
SUGGESTIONS

Last post by exxos « Sun Oct 21, 2018 12:58 am
Replies: 55
by exxos » Tue Aug 22, 2017 6:24 pm
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Post here suggestions to include in the new STF.

Here are some common ones..

HDMI output
Well , there is no way to do this without a scan...
55 Replies

5134 Views

Last post by exxos
Sun Oct 21, 2018 12:58 am
Current roadmap 2018

Last post by exxos « Fri Sep 28, 2018 9:36 pm
Replies: 7
by exxos » Sun Jul 29, 2018 11:53 am

First of all, this project isn't dead.. far from it..

Current status of the motherboard is I need to add caps and manually route the RGB drivers.....

7 Replies

1279 Views

Last post by exxos
Fri Sep 28, 2018 9:36 pm
PSU bracket remake ?

Last post by Forgottenmyname « Thu Jan 31, 2019 8:03 pm
Replies: 71
by exxos » Fri Aug 10, 2018 7:41 pm
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Was actually thinking about the metal power supply plate, mostly in terms of the remake project, also maybe use with normal Atari's as well..

If...
71 Replies

3663 Views

Last post by Forgottenmyname
Thu Jan 31, 2019 8:03 pm
un-f*ck boards new order

Last post by Forgottenmyname « Sat Jan 12, 2019 12:33 pm
Replies: 3
by exxos » Fri Jan 11, 2019 10:39 pm

I'm getting 10 of the V3 video-dac boards made, plus some more RGB connector un-f*ck boards for Icky..

Is there any other essentials of any of these...

3 Replies

222 Views

Last post by Forgottenmyname
Sat Jan 12, 2019 12:33 pm
DMA port "update" ideas..

Last post by rpineau « Sun Dec 23, 2018 4:39 am
Replies: 126
by exxos » Sun Oct 14, 2018 10:59 pm
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I started a seperate thread for this...

For those not aware...

We finally solved the idea behind the STE DMA buffers. Basically the 1772 does not...
126 Replies

5690 Views

Last post by rpineau
Sun Dec 23, 2018 4:39 am
Falcon Ram boards for sale on evilBay (AtariFreak)

Last post by francouai « Sat Dec 15, 2018 9:39 am
Replies: 2
by Forgottenmyname » Fri Dec 14, 2018 9:32 pm

Hi All,

Just in case anyone needs a falcone ram board still, there's currently two for sale on evilbay.

2 Replies

257 Views

Last post by francouai
Sat Dec 15, 2018 9:39 am
Video driver thoughts

Last post by exxos « Fri Dec 07, 2018 7:44 pm
Replies: 270
by exxos » Thu Sep 27, 2018 9:33 pm
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I thought about this before basically I think the conclusion was that it was hard to get any simple video DACs now..I do have a huge stack of the...
270 Replies

6336 Views

Last post by exxos
Fri Dec 07, 2018 7:44 pm
32Mhz oscillator "issue"

Last post by ijor « Fri Dec 07, 2018 3:58 pm
Replies: 19
by exxos » Fri Aug 31, 2018 4:45 pm
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The first small issue is that I am actually using a standard 32MHz oscillator.. The machine itself will of course work fine.. But only actually just...
19 Replies

1249 Views

Last post by ijor
Fri Dec 07, 2018 3:58 pm
Cycle exact FPGA recreation

Last post by exxos « Sat Dec 01, 2018 10:23 am
Replies: 7
by troed » Mon Oct 22, 2018 1:13 pm

Ijor's analysis work has paid off. It runs Closure :D :D

7 Replies

510 Views

Last post by exxos
Sat Dec 01, 2018 10:23 am
Cartridge port adding RW...

Last post by Petari « Mon Nov 26, 2018 8:09 pm
Replies: 9
by exxos » Mon Oct 15, 2018 10:54 am

There was a brief talk over on AA last year about replacing the cartridge port with a super I/O port. There was of course mixed views about this....

9 Replies

602 Views

Last post by Petari
Mon Nov 26, 2018 8:09 pm
MMU SMT ADAPTERS - WIP

Last post by troed « Mon Nov 26, 2018 11:43 am
Replies: 27
by exxos » Tue Oct 23, 2018 6:13 pm
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Somewhere I mentioned about the lack of PLCC MMU & GLUE, and that I have small stock of SMT versions which I may build onto the possible future...
27 Replies

1386 Views

Last post by troed
Mon Nov 26, 2018 11:43 am
RESET circuit tweaks

Last post by exxos « Sat Nov 17, 2018 2:22 pm
Replies: 116
by exxos » Thu Sep 27, 2018 8:41 pm
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Some little tweaks to try..

Replace C901 with a 1uF ceramic... This is basically what the Falcon circuit does. It affects the delay time after the...
116 Replies

3162 Views

Last post by exxos
Sat Nov 17, 2018 2:22 pm
TOS startup sequence.

Last post by JezC « Fri Nov 09, 2018 2:19 pm
Replies: 17
by exxos » Mon Sep 17, 2018 10:26 pm
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Trying to find more info on this.. only found this so far...

System_Startup.jpg
17 Replies

1120 Views

Last post by JezC
Fri Nov 09, 2018 2:19 pm
RAM Boards

Last post by rubber_jonnie « Thu Nov 08, 2018 12:09 pm
Replies: 14
by rubber_jonnie » Tue Sep 04, 2018 8:31 am
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FYI I have received two RAM boards kindly donated by Stuart Duncan from Australia.

One is populated, one is not.

I already have one myself, so...
14 Replies

1075 Views

Last post by rubber_jonnie
Thu Nov 08, 2018 12:09 pm
Making things smaller

Last post by Icky « Thu Nov 01, 2018 12:06 pm
Replies: 9
by exxos » Wed Oct 31, 2018 9:43 pm

Of course I talk about doing away with the TTL chips in favour for tiny logic, generally using more SMT stuff... Also I found there is a PLCC 68901...

9 Replies

465 Views

Last post by Icky
Thu Nov 01, 2018 12:06 pm
Bigger isn't always better

Last post by rubber_jonnie « Thu Nov 01, 2018 10:00 am
Replies: 16
by rubber_jonnie » Wed Oct 31, 2018 9:58 am
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For a bit of fun, I snapped the STF remake board on top of the donor C070789 board just to compare.

Huge respect to exxos for the amazing reduction...
16 Replies

782 Views

Last post by rubber_jonnie
Thu Nov 01, 2018 10:00 am
Internal UltraSatan

Last post by sandord « Fri Oct 26, 2018 7:20 pm
Replies: 6
by exxos » Fri Oct 26, 2018 2:57 pm

My Xmas pressies arrived :D

IMG_3350.JPG

So my initial thought was having this mounted like this.. So the cards are above the sockets at the...

6 Replies

403 Views

Last post by sandord
Fri Oct 26, 2018 7:20 pm
Floppy connector un-f*ck pcb

Last post by Icky « Wed Oct 24, 2018 8:12 pm
Replies: 8
by exxos » Mon Oct 08, 2018 1:14 pm

Thanks to Icky for unravelling this connector chaos..I have started in a new un-f*ck PCB... Highlighted below are just the GND connections to...

8 Replies

540 Views

Last post by Icky
Wed Oct 24, 2018 8:12 pm
Mongrel edition motherboard thoughts

Last post by exxos « Tue Oct 23, 2018 9:26 pm
Replies: 21
by exxos » Tue Oct 23, 2018 2:16 pm
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I have a lot of SMT GLUE & MMU currently.. I want to try and make a adapter PCB so they can be used in place of PLCC chips ultimately.. Because...
21 Replies

982 Views

Last post by exxos
Tue Oct 23, 2018 9:26 pm
Testing the blitter

Last post by Icky « Mon Oct 22, 2018 6:38 pm
Replies: 16
by exxos » Mon Oct 22, 2018 10:56 am
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Long story short, it didn't work. :(

I tested the blitter in my STFM, and it works. In the STF I just get a totally black screen. I took the blitter...
16 Replies

764 Views

Last post by Icky
Mon Oct 22, 2018 6:38 pm
ALPHA MODIFICATIONS

Last post by exxos « Mon Oct 22, 2018 3:55 pm
Replies: 85
by exxos » Sun Sep 09, 2018 9:27 pm
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Started a new thread for must do fixes and mods etc.
85 Replies

4607 Views

Last post by exxos
Mon Oct 22, 2018 3:55 pm
Parallel port

Last post by PaulJ « Sat Oct 20, 2018 3:12 pm
Replies: 8
by kodak80 » Sat Oct 20, 2018 3:50 am

Hi everyone

I tried using PARCP on my 2nd board and it fails to work which may mean either I have some dodgy soldering or the port pins are not...

8 Replies

423 Views

Last post by PaulJ
Sat Oct 20, 2018 3:12 pm
Part kits

Last post by exxos « Fri Oct 19, 2018 3:07 pm
Replies: 28
by exxos » Thu Aug 16, 2018 7:13 pm
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Would anyone be interested if I put together a basic parts kit for this ? I'm going to have to order all the parts myself anyway.. I probably have a...
28 Replies

2529 Views

Last post by exxos
Fri Oct 19, 2018 3:07 pm
Another floppy mod thought

Last post by exxos « Thu Oct 18, 2018 4:06 pm
Replies: 4
by exxos » Thu Oct 18, 2018 11:30 am

Had this thought before.. But we could actually tweak the motor on signal for internal and external drives as currently motor on goes to both...

4 Replies

318 Views

Last post by exxos
Thu Oct 18, 2018 4:06 pm

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