STE 32MHz PLUG IN BOOSTER REV V4sm 2021 INSTALL INSTRUCTIONS

Help & information about the STE V1 series boosters.
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STE 32MHz PLUG IN BOOSTER REV V4sm 2021 INSTALL INSTRUCTIONS

Post by exxos »

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REQUIREMENTS

STE DUALTOS PCB and FAST ROM.

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STEP 1

Solder the thin wire as shown in the image below.

NOTE - This needs to be a 74F257. Some STE's may have a 74S257 chip for U405. This chip does not output correct TTL voltages to drive the booster. As such the machine will likely be unstable or not boot.

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STEP 2

Route the wire similar to below.

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STEP 3

The 5 SIL resistors should be removed. I have sockets in my motherboard as shown below, but resistors should simply be removed when fitting the booster as they are on the booster board. The booster *might* work with the original SIL's but I don't recommend leaving them in other than initial testing.

If the booster board has the "472" number stamped on the resistor packs then there is no need to remove the motherboard SILs assuming they are the original values (generally 10K or 4.7K depending on motherboard revision)

Please also check P100 on the motherboard is a 1.2K value (122J on the resistor pack). If it is not that value then it must be replaced.

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STEP 4

Insert the "Dummy CPU". This may be a tight fit, but do not force it.

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STEP 5

Trim the wire as required and solder to the bottom of the board as shown below.

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STEP 6

Using a torch, carefully align and push down the booster into the socket.

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STEP 7

Solder the white wire as shown below.

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Check your work and you should be able to power on without any issues. Use GB6 to verify operation.

When closing the case with metal shielding, use the spacer as shown below. This will keep pressure on the board.

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Re: STE 32MHz PLUG IN BOOSTER REV V4sm 2021 INSTALL INSTRUCTIONS

Post by exxos »

KNOWN ISSUES

Machine will not boot without pressing the reset button.

Solder a 22uF capacitor across C100 or replace it with a higher value.

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Machine is unstable.

Mostly down to bad connections, or Parity simms which will result in problems like the video below.


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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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Re: STE 32MHz PLUG IN BOOSTER REV V4sm 2021 INSTALL INSTRUCTIONS

Post by exxos »

FAQ

Q) Do I have to use the "Dummy CPU" part ?
Yes. Without it the pressure of the socket contacts will start to bend the pins. When this happens booster will pop out of the socket and be virtually impossible get to stay in otherwise.

Q) How do I enable 8MHz mode
Connect the SW pad on the booster some 0v somewhere to disable the boosters 32Mhz mode and enables 8MHz mode.

Q) Can I use different wire ?
Short answer,No. You should use the thin wire which is supplied in the kit. Using different wire can cause stability issues or worsen video interference.

Q) Can I use different simms other than the exxos brand ones?
Yes. The only known requirement for memory is that they are not parity simms.

Q) Ultra satan is unstable after fitting the booster.
You need to do the DMA fixes. See topic 3. https://www.exxosforum.co.uk/forum/viewt ... =17&t=1585 Also not removing the motherboard SIL's can cause new DMA issues.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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