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The "BAD DMA" - The Myth , The Legend, The lies.

Last post by exxos « Tue Aug 22, 2017 10:46 pm

by exxos » Tue Aug 22, 2017 10:46 pm

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The Bad DMA has been circulating around the Internet since the dawn of time. Where the -38 is apparently the route of all evil and every...

0 Replies

549 Views

Last post by exxos
Tue Aug 22, 2017 10:46 pm
GENERAL TIPS

Last post by exxos « Sun Aug 20, 2017 10:24 pm

by exxos » Sun Aug 20, 2017 10:24 pm

MACHINE DEAD ST/E/F/M/MEGA
If there is no lights on the keyboard either power or floppy , then likely the PSU has died.

2 or 3 BOMBS ON POWER UP...

0 Replies

417 Views

Last post by exxos
Sun Aug 20, 2017 10:24 pm
READ ME FIRST

Last post by exxos « Fri Aug 18, 2017 3:31 pm

by exxos » Fri Aug 18, 2017 3:31 pm

If you are asking for help to repair your machine then state as much information as possible. Posting things like Why does my ST not boot isn't...

0 Replies

332 Views

Last post by exxos
Fri Aug 18, 2017 3:31 pm
STM1 mouse lead

Last post by PeteW « Sat Nov 17, 2018 5:31 pm
Replies: 8
by PeteW » Sat Nov 17, 2018 1:28 pm

My ST mouse is fighting me at the moment. I've been playing quite a few point and click adventures like Monkey Island and the microswitches finally...

8 Replies

77 Views

Last post by PeteW
Sat Nov 17, 2018 5:31 pm
MC68882FN16A for MEGASTE

Last post by PaulJ « Wed Nov 14, 2018 8:20 pm
Replies: 6
by francouai » Wed Nov 14, 2018 3:39 pm

I recently installed a MC68882FN16A FPU on my MEgaSte.
let's say.. for fun.. because I don't need it. :D

I'm not sure why, but when I start...

6 Replies

85 Views

Last post by PaulJ
Wed Nov 14, 2018 8:20 pm
Installing a new SCSI HDD into my MSTE

Last post by Petari « Wed Nov 14, 2018 3:17 pm
Replies: 3
by francouai » Wed Nov 14, 2018 2:41 pm

Hi guys!

My internal 40mo SCSI Drive from my MegaSTE is ... very small :D
I put few games and demos and it is overfull.

I have installed another...

3 Replies

29 Views

Last post by Petari
Wed Nov 14, 2018 3:17 pm
Determined to add internal IDE to my STFM

Last post by sety « Mon Nov 12, 2018 9:58 am
Replies: 19
by sety » Tue Nov 06, 2018 8:09 am
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After trying to build the Popsel & Perra IDE interface a few times with the very vintage PNG-carbon image transfer method (what a messy job! and with...
19 Replies

324 Views

Last post by sety
Mon Nov 12, 2018 9:58 am
Cable info to connect a Mega ST keyboard to a standard ST

Last post by JezC « Mon Nov 12, 2018 8:42 am
Replies: 2
by JezC » Sun Nov 11, 2018 9:48 pm

Hi, I'm hoping someone can help point me in the right direction.

I've got an original Mega ST keyboard & used to have this connected into a stock ST...

2 Replies

64 Views

Last post by JezC
Mon Nov 12, 2018 8:42 am
1040 STF shifted video

Last post by Smonson « Sat Nov 10, 2018 11:24 pm
Replies: 7
by sandord » Sat Nov 10, 2018 2:30 pm

So, I've got another 1040 STF (C103175) in the mail last week (only the bottom part that is, no keyboard or cover).

Today I tried if it worked.

Now...

7 Replies

117 Views

Last post by Smonson
Sat Nov 10, 2018 11:24 pm
Ultrasatan not detected.

Last post by exxos « Fri Nov 09, 2018 9:36 pm
Replies: 5
by Encolpius » Fri Nov 09, 2018 8:04 pm

Hello everyone.

Bit of a saga here, so bear with me.

On Tuesday, my nice shiny new Ultrasatan arrived. I plugged it in to Esmerelda (my old STFM)...

5 Replies

69 Views

Last post by exxos
Fri Nov 09, 2018 9:36 pm
MSTE PSU has 25V cap instead of 10V - safe to replace?

Last post by exxos « Wed Nov 07, 2018 10:21 pm
Replies: 20
by sandord » Thu Nov 01, 2018 9:05 pm
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I'm currently recapping a MSTE PSU for a friend. I'm following instructions from

There's a 10V 100uF cap according to the list but this PSU has a...
20 Replies

292 Views

Last post by exxos
Wed Nov 07, 2018 10:21 pm
PLCC SOCKETS ARE EVIL

Last post by Maeke « Wed Nov 07, 2018 10:56 am
Replies: 21
by exxos » Tue Aug 22, 2017 10:11 pm
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While testing out a booster prototype I found that it refused to work with the 68HC000 CPU. I first thought that there was some problem with...
21 Replies

2319 Views

Last post by Maeke
Wed Nov 07, 2018 10:56 am
DMA issues

Last post by uwe.gottschling « Fri Nov 02, 2018 8:30 pm
Replies: 10
by uwe.gottschling » Thu Nov 01, 2018 10:30 am
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Hi,

I have a 1040STE with the CO25913-38. I can't access any floppy disk. Also changing the floppy drive didn't solve the problem.
I changed the CPU...
10 Replies

260 Views

Last post by uwe.gottschling
Fri Nov 02, 2018 8:30 pm
Ideas on non-working Mega 4?

Last post by exxos « Fri Nov 02, 2018 5:56 pm
Replies: 10
by troed » Sun Oct 14, 2018 5:03 pm
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Acquired a (known) non-working Mega 4 today. Won't have time to open it up and look at for two weeks, but I thought I should post what it looks like...
10 Replies

262 Views

Last post by exxos
Fri Nov 02, 2018 5:56 pm
Issues after failed TOS upgrade STe

Last post by PaulJ « Thu Nov 01, 2018 1:51 pm
Replies: 8
by winner61 » Tue May 29, 2018 12:15 pm

Hello all. If you read my intro you know I have recently bought an STe from France. Worked all ok and liked an UK/US TOS and at the same time go from...

8 Replies

487 Views

Last post by PaulJ
Thu Nov 01, 2018 1:51 pm
Exxos STE RAM Upgrade - machine sees only 2 mb

Last post by sandord « Fri Oct 19, 2018 10:19 pm
Replies: 9
by sandord » Sun Oct 14, 2018 1:34 am

I got my STE RAM upgrade from Exxos store. It consists of 4 SIMM boards.

I installed it but my STE says it's got only 2 MB instead of four.

I did...

9 Replies

317 Views

Last post by sandord
Fri Oct 19, 2018 10:19 pm
Sony mpf110-03 - Atari MSTE

Last post by francouai « Fri Oct 19, 2018 5:18 pm
Replies: 3
by francouai » Thu Oct 18, 2018 9:10 pm

Hi folks!
I recently bought a nice MEGA STE with 4mo and 40mo SCSI HDD.
I'm getting issues with it.

The internal sony mpf110-03 is dead.
The reader...

3 Replies

114 Views

Last post by francouai
Fri Oct 19, 2018 5:18 pm
STE " It's dead Jim"

Last post by rubber_jonnie « Wed Oct 17, 2018 2:51 pm
Replies: 9
by MagneticFever » Thu Oct 04, 2018 4:26 pm

Hi all,
new to the forum and finally worked up enough courage to ask some questions. Joined a few weeks ago and have been
reading/studying all that...

9 Replies

325 Views

Last post by rubber_jonnie
Wed Oct 17, 2018 2:51 pm
1040 STF showing occasional rogue pixels

Last post by mantra « Sat Oct 06, 2018 7:27 pm
Replies: 100
by sandord » Wed Sep 26, 2018 10:40 pm
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I'm trying to fix my friend's 1040 STF. After running for a while, it starts to show rogue pixels in some places and occasionally it crashes.

The ST...
100 Replies

2008 Views

Last post by mantra
Sat Oct 06, 2018 7:27 pm
resurrecting an STFM

Last post by rubber_jonnie « Tue Sep 25, 2018 10:33 pm
Replies: 15
by stween » Sat Sep 22, 2018 7:18 pm
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I picked up a 520 STFM from ebay, advertised as for parts because it didn't boot. I wanted to take a look see if it was easily repairable. Presumably...
15 Replies

466 Views

Last post by rubber_jonnie
Tue Sep 25, 2018 10:33 pm
Falcon IDE read failing at higher frequencies

Last post by mikro « Sun Sep 23, 2018 9:06 pm
Replies: 12
by mikro » Wed Sep 19, 2018 7:24 pm
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I'm aware that after this post all the remaining bits of my reputation and pride will be gone but hey, it's always better ask more experienced...
12 Replies

336 Views

Last post by mikro
Sun Sep 23, 2018 9:06 pm
Atari 520 STM with video issue (bars and waves)

Last post by KyleB « Wed Sep 12, 2018 1:30 pm
Replies: 3
by PilgrimST » Wed Aug 22, 2018 7:45 pm

Hi all,

I wonder if someone could help me.
I have an Atari 520 STM with 1MB RAM upgrade and TOS 1.04, it is connected via SCART cable to a SAMSUNG...

3 Replies

250 Views

Last post by KyleB
Wed Sep 12, 2018 1:30 pm
STF stuck in boot loop

Last post by tzok « Mon Sep 10, 2018 9:52 pm
Replies: 13
by sandord » Sat Sep 08, 2018 12:07 am
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My STF is stuck in a boot loop. It accesses the floppy drive for a second or two and then reboots. I don't think it's seeking or anything, I just...
13 Replies

705 Views

Last post by tzok
Mon Sep 10, 2018 9:52 pm
CPU suitable for stock Falcon

Last post by Tophe38 « Fri Sep 07, 2018 9:59 pm
Replies: 4
by Tophe38 » Fri Sep 07, 2018 12:37 pm

Good afternoon,

About CPU for stock Atari Falcon, is cpu model MC68030FE33 is suitable ? (QFP version).

Thanks!
Tophe

4 Replies

334 Views

Last post by Tophe38
Fri Sep 07, 2018 9:59 pm
Degraded video quality with 1040 STF (C070523-001 REV.D)

Last post by tzok « Fri Sep 07, 2018 3:32 pm
Replies: 17
by sandord » Wed Sep 05, 2018 12:18 pm
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My 1040 STF (motherboard revision: C070523-001 REV.D) shows degraded video quality.

The signal isn't as sharp as my other ST (an STFM) and there's a...
17 Replies

599 Views

Last post by tzok
Fri Sep 07, 2018 3:32 pm

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