This zip contains a BIOS pack for the Toshiba T3200SX

To see which original BIOS version is installed on your T3200SX, run TEST3.EXE and select option 8 - System Configuration

Original BIOS (27C1024)
This contains the original BIOS versions found so far:
T3200SX BIOS V1.10 + new VGA (Award).BIN - this version has an updated VGA BIOS, original VGA not found so far
T3200SX BIOS V3.10 (Phoenix).BIN - Toshiba switched to using a Phoenix BIOS for this release
T3200SX BIOS V5.30 (Award).BIN - Most recent version found so far

The Award V1.xx versions are the only ones that will boot from any HD without any patches and thus allow drive overlay software to run, later versions will refuse to boot any drive that doesn't match the BIOS setting and will only work with an external boot ROM such as XTIDE.

The patched versions of the BIOS have the following changes:
Built in XTIDE to boot from any HD
Fix an issue that stopped formatting 1.44MB discs on some machines with DOS version 4 or higher
Support external 3.5" 1.44MB instead of 5.25" floppy drive on the printer port (useful with a GOTEK floppy emulator)

There are two alternative versions of the patched BIOSes with different versions of XTIDE universal BIOS.
1. HIMEM 639K
This is essentially a minimal but otherwise standard 386 build of XTIDE with some minor tweaks to make sure windows 95 doesn't run in MSDOS compatibility mode and Windows NT doesn't blue screen on boot.
This version reserves 1K at the top of conventional memory for it's workspace leaving 639K free for the OS which is the same technique used by drive overlay software.
Unfortunately, this technique is not compatible with Windows 2/386 or Windows 3.00 in 386 enhanced mode and they will crash if you try to run them.
The problem was fixed in Windows 3.00a and later.

2. LOMEM 640K
This version is a modified version of the 386 build of XTIDE which uses workspace in low memory at 30:0 and some unused BIOS workspace at 40:0 instead.
It will run all early windows versions and has the full 640K available to the OS.

The LOMEM version was made so it would be possible to boot all early versions of windows on a multiboot setup using grub4dos.
However, this version might have unknown compatibility issues with any software which makes use of the same low memory workspace which is why the HIMEM version is included as well.
(Some BIOSes of the early 90s had a configurable option to switch between using similar HI and LO workspaces for the same reason)

Patched files are:

T3200SX BIOS V1.10 + new VGA (Award) patch 1.0 with HIMEM XTIDE 639K.BIN
T3200SX BIOS V5.30 (Award) patch 1.0 with HIMEM XTIDE 639K.BIN

T3200SX BIOS V1.10 + new VGA (Award) patch 1.0 with LOMEM XTIDE 640K.BIN
T3200SX BIOS V5.30 (Award) patch 1.0 with LOMEM XTIDE 640K.BIN

There is currently no patch for Phoenix V3.10
