ROM UPGRADES

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Maximum 520STfm TOS version Etc

Last post by exxos « Sat Aug 17, 2019 9:49 am
Replies: 38
by AtariFox » Wed Aug 07, 2019 6:37 pm
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Apologies if this is in the wrong section.

I'm new to the ATari ST systems, I just bought a 520 STFM with sm124 monochrome monitor, (the monitor has...
38 Replies

2370 Views

Last post by exxos
Sat Aug 17, 2019 9:49 am
STE TOS 1.06/1.62 to TOS 2.06 EPROM UPGRADE

Last post by PhilC « Sat Jun 22, 2019 7:03 pm
Replies: 3
by exxos » Mon Feb 05, 2018 10:24 pm

One of the easier and semi-popular STE upgrades is upgrading the TOS to 2.06. TOS2.06 is the last TOS version for ST/STE computers which include...

3 Replies

2051 Views

Last post by PhilC
Sat Jun 22, 2019 7:03 pm
MASK AND ROM PINOUTS EXPLAINED

Last post by tzok « Sat Jun 15, 2019 9:55 pm
Replies: 2
by exxos » Fri Feb 02, 2018 1:21 pm

There seems to be constant confusion over what chips can be used for EPROMs in various STs. This is actually confused myself for a while, basically...

2 Replies

1083 Views

Last post by tzok
Sat Jun 15, 2019 9:55 pm
TOS 2.06 English stock?

Last post by exxos « Thu Mar 28, 2019 7:27 pm
Replies: 2
by yars » Wed Mar 27, 2019 2:19 pm

I'm wanting to upgrade my STE from 1.06 to 2.06 but noticed the English versions are out of stock, will there be a restock soon?

2 Replies

431 Views

Last post by exxos
Thu Mar 28, 2019 7:27 pm
Falcon 030 TOS404

Last post by exxos « Sat Feb 09, 2019 6:43 pm
Replies: 2
by exxos » Sat Sep 30, 2017 1:01 pm

Latest and best TOS4.04 FAST ROM (not cheaper/slower eprom type) . Either a update or as a replacement for Atari Falcon 030 / C-LAB machines. These...

2 Replies

1230 Views

Last post by exxos
Sat Feb 09, 2019 6:43 pm
TOS 104/102 STF/M C070789

Last post by exxos « Tue Dec 11, 2018 1:17 pm
Replies: 1
by exxos » Sat Sep 30, 2017 12:54 pm

Adapter pcb to plug into most STFM C070789 machines.

It is possible to fit the board into the ROM sockets, but the extra height may not allow the...

1 Replies

1194 Views

Last post by exxos
Tue Dec 11, 2018 1:17 pm
STF 6 CHIP ROM LOCATIONS

Last post by tzok « Thu Nov 29, 2018 9:31 am
Replies: 1
by exxos » Mon Feb 05, 2018 10:28 pm

Just a quick post to document the locations of the ROM's under the PSU.. I find it confusing what ROM goes where, so here's where they all go!

Some...

1 Replies

1587 Views

Last post by tzok
Thu Nov 29, 2018 9:31 am
Strange TOS 1.4 intro screen

Last post by sandord « Sun Oct 28, 2018 10:11 pm
Replies: 2
by sandord » Sun Oct 28, 2018 9:55 pm

I got a Exxos TOS 1.2/1.4 board yesterday. I installed it and when selecting TOS 1.4, I see the following intro screen which looks unfamiliar to me....

2 Replies

693 Views

Last post by sandord
Sun Oct 28, 2018 10:11 pm
Availability of 0042 ROM’s

Last post by Axnfell « Mon Sep 10, 2018 1:45 pm
Replies: 2
by Axnfell » Mon Sep 10, 2018 1:32 pm

Hi Chris,

Had a little spare cash so ordered a few things off your site, one of the items I need is still out of stock, I.e. the 0042 English...

2 Replies

788 Views

Last post by Axnfell
Mon Sep 10, 2018 1:45 pm
TOS 2.06 Mega STe

Last post by exxos « Sun Sep 09, 2018 10:40 am
Replies: 12
by Fletch » Sun Aug 19, 2018 8:33 pm
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I received a TOS 2.06 upgrade kit for my Mega STe from Chris this week and am not having luck getting the machine to boot with the new ROMs...
12 Replies

2207 Views

Last post by exxos
Sun Sep 09, 2018 10:40 am
STE DUAL TOS 1.62 & TOS206

Last post by rubber_jonnie « Fri Jul 27, 2018 1:53 pm
Replies: 6
by exxos » Sat Sep 30, 2017 1:06 pm

TOS 1.62 / 2.06 is selectable by a jumper on the board, or can be fitted with a toggle switch if required. This board can also be used as a Fast TOS...

6 Replies

2145 Views

Last post by rubber_jonnie
Fri Jul 27, 2018 1:53 pm
STe QUAD TOS install

Last post by winner61 « Tue Jul 10, 2018 12:45 pm
Replies: 2
by winner61 » Tue Jul 10, 2018 11:38 am

I did a Quad TOS Install on my STe with this 'www.tehkella.net/retro/?p=257' guide. Bought myself a cheap eeprom programmer TL866A and eeproms from...

2 Replies

787 Views

Last post by winner61
Tue Jul 10, 2018 12:45 pm
Strange TOS 1.04 Issue

Last post by graz « Mon May 07, 2018 5:22 pm
Replies: 6
by graz » Mon May 07, 2018 4:08 pm

I have been trying to upgrade my 520ST from TOS 1.02 to 1.04. It had six NEC D27256D EPROMs in it containing the old TOS and were working fine. I...

6 Replies

1557 Views

Last post by graz
Mon May 07, 2018 5:22 pm
Fixing broken pins on a ROM chip

Last post by rubber_jonnie « Thu Apr 26, 2018 3:05 pm
Replies: 5
by rubber_jonnie » Wed Apr 25, 2018 10:43 pm

Since this just happened to me, and also someone else on the Facebook Pages, I thought I'd do a quick fix guide for if you've broken a pin off your...

5 Replies

1399 Views

Last post by rubber_jonnie
Thu Apr 26, 2018 3:05 pm
STE Dual TOS switcher widget (obsolete - never produced)

Last post by tzok « Sun Mar 11, 2018 9:18 pm
Replies: 19
by rubber_jonnie » Thu Jan 18, 2018 11:55 pm
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I'm very lucky to have got my hands on one of these:

IMG_20180118_223024.jpg

It's basically a tiny device from Urban Jonsson, that lets you use a...
19 Replies

4853 Views

Last post by tzok
Sun Mar 11, 2018 9:18 pm
STFM C070789 6 CHIP TO 2 CHIP CONVERSION

Last post by troed « Mon Feb 05, 2018 10:46 pm
Replies: 1
by exxos » Mon Feb 05, 2018 10:35 pm

On later motherboards where the TOS ROM's are in a row as shown on the images below, these motherboards can be converted to 2 chip TOS. Generally 6...

1 Replies

1134 Views

Last post by troed
Mon Feb 05, 2018 10:46 pm
TOS 104NL 6 chip

Last post by exxos « Mon Dec 18, 2017 8:39 pm
Replies: 1
by guus.assmann » Mon Dec 18, 2017 8:37 pm

Hello,
Maybe not the best place, so move if needed.
Today I've found a version of Tos 1.04 that I didn't know about.
It's a Dutch version....

1 Replies

1126 Views

Last post by exxos
Mon Dec 18, 2017 8:39 pm
Tos 2.06 mod, startup delay begone.

Last post by troed « Sun Dec 10, 2017 9:09 pm
Replies: 3
by guus.assmann » Sun Dec 10, 2017 3:20 pm

Hello,

Once uppon a time, I saw some notes on how to get rid of the startup delay in Tos 2.06.
I mean the delay that's needed for a HD to spinn up....

3 Replies

1769 Views

Last post by troed
Sun Dec 10, 2017 9:09 pm
So what is wrong with this idea?

Last post by exxos « Tue Nov 21, 2017 6:06 pm
Replies: 1
by Bikerbob » Tue Nov 21, 2017 4:20 pm

Found this on

So if you have the programmer, and I think I can do this with my Willem. You can have 4 x 512mb roms.

Any comments?

James

1 Replies

1049 Views

Last post by exxos
Tue Nov 21, 2017 6:06 pm
[pics] 1.62/2.06 switcher build

Last post by exxos « Sun Oct 22, 2017 1:25 pm
Replies: 1
by spiny » Sun Oct 22, 2017 12:54 pm

Hi All,

some new pics on building up the STe switcher, just to show how easy it is, in case anyone is putting off ordering one due to soldering...

1 Replies

1551 Views

Last post by exxos
Sun Oct 22, 2017 1:25 pm
TOS104 / TOS102 MEGA ST

Last post by exxos « Sun Oct 01, 2017 12:44 am
Replies: 2
by exxos » Sat Sep 30, 2017 12:59 pm

Adapter pcb to plug into most MEGA ST machines which gives a jumper selectable TOS 102 & Rainbow TOS 104. This kit can be used as a stand alone TOS...

2 Replies

1425 Views

Last post by exxos
Sun Oct 01, 2017 12:44 am
ST/F/M UNIVERSAL TOS104 UPGRADE (2 or 6 chip)

Last post by exxos « Sat Sep 30, 2017 1:09 pm

by exxos » Sat Sep 30, 2017 1:09 pm

Universal TOS104 upgrade kit which can be fitted to any ST/F/M which would ordinarily be stuck with 6 chip TOS. The master board has a small IC which...

0 Replies

895 Views

Last post by exxos
Sat Sep 30, 2017 1:09 pm

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ROM UPGRADES

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