The LaST Upgrade Part 39 - TF536 ST EDITION

Last updated June 17, 2022

 

The TF536 REV5 ST EDITION is a exxos port of the popular TF536 Amiga accelerator by Terriblefire which offers 50Mhz 030 CPU with 64MB fast-ram and IDE.

The firmware & hardware has been extensively revised to better suit the Atari ST range of computers. The PCB has been revised in various places to include more parts on the bottom so that they can be supplied preassembled. It's most prominent new feature is the on-board DUALTOS ROM where the decoding is built into the PLD. You can for example have TOS206 and EMUTOS in ROM without requiring a separate dual TOS board. There have been other tweaks for better compatibility with the Atari machines such as fixing the IDE port to use a standard cable.

NOTE: While the original TF536r2 has a Atari firmware developed by agranlund, it is not a active project. Do not confused the ST version of the TF536 (now called ST536 REV5) with the original TF536r2. The hardware and firmware are not compatible or exchangeable!

Please see the forum for all related development progress. https://www.exxosforum.co.uk/forum/viewtopic.php?f=94&t=3992

 

TOS206 NO BLITTER BENCHMARK
TOS206 BENCHMARK WITH BLITTER

REVISION HISTORY

TF536 rev1 & rev2 are the initial terrible fire release boards which are not part of the ST EDITION series. At the time of typing the REV2 boards are on still on sale in the store.

TF536 ST EDITION REV3 is the initial release of the ST only version of the TF536 board which is the one as illustrated in the top of the page and requires the pull-up resistor of 1K shown on the image. The IDE port is not functional on this revision. This board has been developed on the H4 motherboard and should also work fine on the H5. It is currently un-tested on the original ST motherboards which will at least need all the mandatory fixes doing. But as original machines have so many problems, I am not officially supporting this accelerator on the original machines.

TF536 ST EDITION REV5 - IDE port fixed. Final release. Current news is posted on the forum

 

FIRMWARE & TOOLS

LATEST FIRMWARE

REV5 ST526 April 25, 2022 - Offical final release.

ST536 TOS206 May 16, 2022 - Exxos patched TOS206 for the ST536 only. Alpha release.

 

OLD / OBSOLETE FIRMWARE:

REV5 ST536v2_IDE_AB April 19, 2022 - IDE autoboot

REV5 ST536Av2 April 15, 2022 - IDE Enabled

REV5 ST536r5A2 - 07/04/2022 - ALPHAv2 - No IDE & blitter- Clock switching - Only 50MHz on alt-ram (same as original TF536 firmware). Trying to fix HDD issues.

REV 3 & 5 ALPHA FIRMWARE VST2A 288XL (IDE not supported, blitter will malfunction) H4 / STF (288XL no longer supported)

REV 3 & 5 ALPHA FIRMWARE VST2A 144XL (IDE not supported, blitter will malfunction) - STE build

REV 3 & 5 ALPHA FIRMWARE VST2A 144XL (IDE not supported, blitter will malfunction) - H4 / STF

 

FASTROM - will load the TOS206 image into fastram and reboot and then goto desktop. Includes YAARTTT & PRGFLAGS.

MAPROM 1.8E - Exxos edit, to turn off "copy lower RAM varibles to fast ram" as it would corrupt the floppy contents. Will copy ROM to FAST-RAM. (seems lower than FASTROM?!)

MAPROM SOURCES - Home of MAPROM tools.

DUALTOS ROM - TOS206 UK, EMUTOS 1.0.1 UK

 

KNOWN ISSUES

Blitter must be removed for EMUTOS.

Cache firmware causes EMUTOS to reset and screen corrupt in TOS206.

(Both are software issues with TOS / EMUTOS) Use the exxos port of TOS206 to fix TOS issues and only use the officual files for firmware and software.

 

PARTS LIST

PLD - XC95144XL-5TQG144C (5ns prefered) or XC95144XL-10TQ144C (10ns currently untested)

SDRAM - W9825G6KH-5 (WINBOND) or AS4C16M16SA-6TCN (preffered)

BUFFERS - SN74CB3T3245PW

PGA SOCKET - https://www.exxoshost.co.uk/atari/store2/#0181

REV 3 PCB - https://www.exxoshost.co.uk/atari/store2/#0220

MC68030RC - https://www.exxoshost.co.uk/atari/store2/#0187

TOS206 ROM - https://www.exxoshost.co.uk/atari/store2/#0143

100MHz OSC (rev 3 only) CB3LV-3C-100M0000

 

 

 

 

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