STF REMAKE PROJECT

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ALPHA USER BUILDS
Where Alpha builders can post pics and progress etc
Topics: 9

9 Topics

1332 Posts

Last post Re: kodak80 progress
by exxos View the latest post
Sun Nov 18, 2018 12:05 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

995 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

3355 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

849 Views

Last post by exxos
Fri Sep 28, 2018 9:36 pm
Video driver thoughts

Last post by Forgottenmyname « Wed Nov 21, 2018 9:03 pm
Replies: 71
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...
71 Replies

1054 Views

Last post by Forgottenmyname
Wed Nov 21, 2018 9:03 pm
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

932 Views

Last post by exxos
Sat Nov 17, 2018 2:22 pm
PSU bracket remake ?

Last post by exxos « Thu Nov 15, 2018 10:11 am
Replies: 65
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...
65 Replies

1914 Views

Last post by exxos
Thu Nov 15, 2018 10:11 am
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

510 Views

Last post by JezC
Fri Nov 09, 2018 2:19 pm
DMA port "update" ideas..

Last post by Icky « Thu Nov 08, 2018 10:41 pm
Replies: 116
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...
116 Replies

1858 Views

Last post by Icky
Thu Nov 08, 2018 10:41 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

637 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

166 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

259 Views

Last post by rubber_jonnie
Thu Nov 01, 2018 10:00 am
MMU SMT ADAPTERS - WIP

Last post by exxos « Mon Oct 29, 2018 11:12 am
Replies: 21
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...
21 Replies

400 Views

Last post by exxos
Mon Oct 29, 2018 11:12 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

132 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

228 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

335 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

279 Views

Last post by Icky
Mon Oct 22, 2018 6:38 pm
Cycle exact FPGA recreation

Last post by exxos « Mon Oct 22, 2018 5:53 pm
Replies: 5
by troed » Mon Oct 22, 2018 1:13 pm

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

5 Replies

151 Views

Last post by exxos
Mon Oct 22, 2018 5:53 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

2675 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

163 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

1493 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

107 Views

Last post by exxos
Thu Oct 18, 2018 4:06 pm
MONO output buffer thoughts

Last post by exxos « Thu Oct 18, 2018 3:45 pm
Replies: 2
by exxos » Thu Oct 18, 2018 3:31 pm

This was added in on the current schematic.. But really as I am planning to adding buffers to place some other chips, I would assume the shifter MONO...

2 Replies

66 Views

Last post by exxos
Thu Oct 18, 2018 3:45 pm
74LS05 vs 74LS06

Last post by exxos « Thu Oct 18, 2018 11:58 am
Replies: 3
by exxos » Thu Sep 27, 2018 8:13 pm

Just noticed the reset circuit has a LS05 which seems to be exactly the same as a LS06... only the LS06 has higher pull down current.

If anyone is...

3 Replies

165 Views

Last post by exxos
Thu Oct 18, 2018 11:58 am
Cartridge port adding RW...

Last post by stephen_usher « Tue Oct 16, 2018 8:15 am
Replies: 2
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....

2 Replies

144 Views

Last post by stephen_usher
Tue Oct 16, 2018 8:15 am
Ordering the Alpha board

Last post by exxos « Mon Oct 15, 2018 4:03 pm
Replies: 139
by exxos » Tue Jul 31, 2018 11:41 am
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PROJECT SPONSORS ARE

* Michael Keenleyside (Gargoyle)
* Richard Coles (Icky)
* troed (Troed Sangberg)
* Phil Copeland (Forgottenmyname)...
139 Replies

5446 Views

Last post by exxos
Mon Oct 15, 2018 4:03 pm

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