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CPU Strangeness

Last post by rubber_jonnie « Thu May 23, 2019 10:47 pm
Replies: 27
by rubber_jonnie » Sat Apr 27, 2019 4:58 pm
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I currently have 2 'dev' boards that I use for various test and beta hardware projects, The came to me as bare boards, so I wasn't so worried about...
27 Replies

438 Views

Last post by rubber_jonnie
Thu May 23, 2019 10:47 pm
ube finds work for idle hands, or a new take on a Falcon connector.

Last post by mikro « Wed May 22, 2019 6:57 am
Replies: 6
by ube » Mon May 20, 2019 9:20 pm

While waiting for my CosmosEx’s 3.0 to arrive I designed a HD50 (Falcon external SCSI) to IDC 50 pin (internal SCSI-II) connector. Now I just need a...

6 Replies

130 Views

Last post by mikro
Wed May 22, 2019 6:57 am
16BIT ROM CART THOUGHTS

Last post by exxos « Tue May 21, 2019 2:30 pm
Replies: 126
by exxos » Mon Aug 28, 2017 6:46 pm
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I have been thinking about the diagnostic cart where larger ROM's are used with a switch to select which version of the ROM to run (IE, ST, STE, MSTE...
126 Replies

11219 Views

Last post by exxos
Tue May 21, 2019 2:30 pm
Help with Unknown overscan Mod please

Last post by PhilC « Sat May 18, 2019 6:07 pm
Replies: 3
by PhilC » Fri May 17, 2019 9:18 pm

Hi all,

Can anyone help me identify this overscan mod and maybe point me in the right direction to any needed software etc.

When switched on it...

3 Replies

96 Views

Last post by PhilC
Sat May 18, 2019 6:07 pm
CHIP from atari ST

Last post by nemox « Wed May 15, 2019 8:51 pm
Replies: 7
by nemox » Wed May 15, 2019 8:02 pm

I have one chip from atari st maybe MEGA ST-
s9012AB
the case of the chip is like an MMU.
Please, what is this chip?
thanks

7 Replies

107 Views

Last post by nemox
Wed May 15, 2019 8:51 pm
MEGA ST upgrading TOS

Last post by exxos « Wed May 15, 2019 10:28 am
Replies: 3
by JezC » Tue May 14, 2019 11:04 pm

I've just opened up my Mega ST4 to see what my options were to upgrade the TOS version (currently 1.02)...mine currently has the two TOS ROMs fitted...

3 Replies

86 Views

Last post by exxos
Wed May 15, 2019 10:28 am
ATARI TOS question

Last post by francouai « Thu May 09, 2019 9:38 am
Replies: 4
by francouai » Wed May 08, 2019 9:29 am

Hello Guys,

I have here two different TOS ROM:

C301175(+76)-002A
and
C301175(+76)-002 (with out A)

Are these roms are TOS 1.62 for the 0002A rev...

4 Replies

174 Views

Last post by francouai
Thu May 09, 2019 9:38 am
Falcon030 Users Experiences

Last post by oguzog « Fri May 03, 2019 2:00 pm
Replies: 5
by oguzog » Fri Apr 26, 2019 1:11 pm

hello Dear forumers,

Atari lovers,

I've FINALLY bought an ATARI Falcon030 (stock plain device)

It is not arrived yet. But it boots up just fine....

5 Replies

216 Views

Last post by oguzog
Fri May 03, 2019 2:00 pm
Janus Atari ST Emulator

Last post by DrF « Thu May 02, 2019 1:44 pm
Replies: 2
by keli » Thu May 02, 2019 11:01 am

I was reminded of the Janus ISA card that contained a 68000, some RAM, and an MFP on a 16 bit ISA card. The card made it possible to run TOS using a...

2 Replies

85 Views

Last post by DrF
Thu May 02, 2019 1:44 pm
BLITTER RE-CREATION THOUGHTS

Last post by PaulJ « Mon Apr 22, 2019 5:40 pm
Replies: 171
by exxos » Tue Aug 22, 2017 10:37 pm
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blitterSM.jpg

Many should know the great work over at in recovering some lost Atari files. I saw in there 2 versions of the blitter IC. 1986 and...
171 Replies

16672 Views

Last post by PaulJ
Mon Apr 22, 2019 5:40 pm
PSU connector ?

Last post by exxos « Sat Apr 20, 2019 6:49 pm
Replies: 5
by exxos » Sat Apr 20, 2019 2:49 pm

Has anyone ever come across the stf/e connector for the PSU ? They are very similar to normal off the shelf connector, but they are not a good fit....

5 Replies

129 Views

Last post by exxos
Sat Apr 20, 2019 6:49 pm
Dual tos adapter - ube switch

Last post by exxos « Tue Apr 09, 2019 4:23 pm
Replies: 7
by DoG » Mon Apr 08, 2019 10:59 pm

I have the dual tos switcher and would like to use the reset switch to change tos. What do I need to populate on the board to get this working? I...

7 Replies

177 Views

Last post by exxos
Tue Apr 09, 2019 4:23 pm
Sidequest: VGA scan doubler

Last post by exxos « Mon Apr 08, 2019 2:17 pm
Replies: 20
by Smonson » Sun Apr 07, 2019 12:46 pm
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Hello, me again!

So, I like to have several projects going at once, as you have probably guessed from my short attention span.

I wanted to get...
20 Replies

440 Views

Last post by exxos
Mon Apr 08, 2019 2:17 pm
Project: HDMI/DVI out for STFM

Last post by rubber_jonnie « Mon Apr 08, 2019 10:43 am
Replies: 508
by Smonson » Sun Oct 29, 2017 9:42 am
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Hi all,

Here's my current project that's been keeping me up late for several months.

I'm creating a HDMI/DVI video out for my STFM by interfacing a...
508 Replies

39700 Views

Last post by rubber_jonnie
Mon Apr 08, 2019 10:43 am
capacitor 4700uF

Last post by dhedberg « Sat Apr 06, 2019 5:54 pm
Replies: 1
by francouai » Sat Apr 06, 2019 4:38 pm

Hi Guys,
I have 5 new capacitor 4700uf used on our Atari ST's.

I'm wondering for what utilization is used this big baby into our ST's ?
I'm thinking...

1 Replies

100 Views

Last post by dhedberg
Sat Apr 06, 2019 5:54 pm
What PLD were the Atari chips? ricoh.. ?

Last post by exxos « Thu Apr 04, 2019 7:30 pm
Replies: 2
by exxos » Thu Apr 04, 2019 5:35 pm

I am sure some point the Atari chips were identified as being one of the ricoh PLDs...Can anyone remember the part number or has the datasheet ? I...

2 Replies

126 Views

Last post by exxos
Thu Apr 04, 2019 7:30 pm
TOS ROMS

Last post by PaulJ « Sun Mar 24, 2019 9:06 pm
Replies: 1
by christofer.ramstedt » Sun Mar 24, 2019 8:31 pm

If i want to burn my own eproms with TOS 2.06 swe for my STE. Is it the same file to both eproms? (HI and LO)
The zip file only have one file and the...

1 Replies

111 Views

Last post by PaulJ
Sun Mar 24, 2019 9:06 pm
Falcon H-sync fault

Last post by exxos « Wed Mar 20, 2019 10:34 pm
Replies: 5
by exxos » Thu Sep 06, 2018 1:58 pm

Never seen this before...

Looking at H-sync it seems to jump down voltage, which seems to be when the monitor goes out of sync.. no idea what...

5 Replies

738 Views

Last post by exxos
Wed Mar 20, 2019 10:34 pm
Which 1040 STF is this?

Last post by 32bitminus « Sun Mar 17, 2019 6:23 pm
Replies: 46
by 32bitminus » Thu Feb 21, 2019 1:53 am
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Waiting for this to arrive, I was trying to figure out which model this is, has a floppy with a smaller button. All the 1040 STFs I can find have the...
46 Replies

1591 Views

Last post by 32bitminus
Sun Mar 17, 2019 6:23 pm
Nova eGPU

Last post by stephen_usher « Sun Mar 17, 2019 5:24 pm
Replies: 1
by Atarian Computing » Sun Mar 17, 2019 1:39 pm

So eGPU is just another name to a phenomenon pioneered by Atarians decades ago in the form of Nova. I always thought it was cumbersome without a...

1 Replies

269 Views

Last post by stephen_usher
Sun Mar 17, 2019 5:24 pm
What is BURS?

Last post by exxos « Mon Mar 11, 2019 1:12 pm
Replies: 10
by sety » Tue Mar 05, 2019 9:52 am
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Hi. :)

Every single ST I've disassembled has the letters BURS scribbled in blue permanent marker across the top of the modulator shield. Does anyone...
10 Replies

438 Views

Last post by exxos
Mon Mar 11, 2019 1:12 pm
I need somebody to upgrade my ST (memory, Tos and IDE)

Last post by Rafi « Mon Mar 04, 2019 10:06 pm
Replies: 6
by Rafi » Mon Mar 04, 2019 12:20 am

I want to upgrade my 520ST to 4mb, and install CF hdd in it. Can somebody help?

6 Replies

277 Views

Last post by Rafi
Mon Mar 04, 2019 10:06 pm
ST RAM upgrade

Last post by exxos « Sun Mar 03, 2019 11:56 am
Replies: 3
by damanloox » Sat Mar 02, 2019 2:14 pm

Can anybody tell me the best/easiest/best looking ;) RAM upgrade for ST (not F)? 2+ MB if possible

3 Replies

224 Views

Last post by exxos
Sun Mar 03, 2019 11:56 am
phantom bus accelerator & clock patch

Last post by Steve « Mon Feb 25, 2019 8:01 pm
Replies: 20
by exxos » Sun Feb 24, 2019 11:10 am
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I looked into my clock patch again on my second Falcon and I think I know why the phantom patch needs the second buffer chip for the SDMA.

Adding...
20 Replies

684 Views

Last post by Steve
Mon Feb 25, 2019 8:01 pm
Ideas for a 1040STF with a socket on the wrong side?

Last post by 32bitminus « Fri Feb 22, 2019 3:08 pm
Replies: 3
by 32bitminus » Fri Feb 22, 2019 2:14 am

So I just picked up a 1040 STF and it looks like it will be more than just a retrobrite and cleaning.

I need to add the composite sync circuit,...

3 Replies

191 Views

Last post by 32bitminus
Fri Feb 22, 2019 3:08 pm

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HARDWARE DISCUSSIONS

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