Debug

Debug and DebugX are extended versions of the old MS DEBUG tool.

Drivers

This collection of drivers by Jack Ellis includes CC, RDisk, RDiskOn, UDVD2, UHDD, UIDE, and XMgr. This is a ZIP archive; individual package files are also available.

HiMemSX

HimemSX is an XMS manager forked from FreeDOS Himem, but with the ability to handle extended memory above the traditional 4 GiB mark. These packages are built from items made available at Japheth's GitHub.

HiMemX

HimemX is an XMS manager derived from FreeDOS Himem, but with additional bugfixes, optimizations and extensions. These packages are built from items made available at Japheth's GitHub.

JWasm

JWasm is a MASM-compatible assembler created by Andreas "Japheth" Grech.

ListPCI

ListPCI is a PCI device listing utility which scans the PCI bus of the system on which its running and displays data on all PCI devices it finds. It provides more verbose data than other comparable applications and is more flexible in its command line options. Using these, you may filter the devices reported to only those of a specified vendor ID or of a specified class. ListPCI can also return the number of matching devices in the DOS system variable ERRORLEVEL, making it easy to integrate into batch scripts.
Note: This application requires a 386 or higher CPU.

ListVESA

ListVESA is a utility to report which VESA video modes are supported by the system's hardware. You can use command line options to tailor information listed to one specific mode, modes supporting a specific color bit depth, modes supporting linear frame buffer, or simply general information on the video adapter itself or a table summarizing available modes with no detailed screen data.
Note: This application requires a 386 or higher CPU.

• ERRORLEVELs are now returned.
• Fixed a bug where reserved set bits in the Mode Attributes weren't caught unless all three were set.
• Fixed a bug which printed a spurious blank line if the "Window B Segment" field contained an address.
• Previously, ListVESA assumed a minimum of one byte per pixel, even for modes with color depths below this value, e.g. 4 bit color. This assumption has been eliminated, and the algorithm now used is much more accurate.
• Removed the "Mode Summary" text as it's a bit obvious in the output what the user is being shown. No need to label it explicitly.
• Tidied up the code with some DEFINEs.
• Window statistics are now grouped together; previously the segment value and the attributes were listed separately in keeping with the order in which the fields appeared within the tVESAModeInfo struct.

• Fixed a minor bug involving the mode count when using the /A switch.
• Improved (once again) the layout of trailing blank lines after the various sections of information which ListVESA dumps.
• Optimized a tiny bit of assembly code.
• Removed a bit of leftover debug code.

• A summary is no longer displayed when using /M. Why do you need to summarize a single mode? :)
• Added message for modes which don't exist on the system.
• Slightly updated the description for the /D switch.
• Using /M now implies /V.

• Added warnings for the user if the BIOS has returned illogical information for a given mode; a message in the detailed list, and an exclamation point beside the entry in the summary table.
• Updated the application description to include the summary table feature.

• Fixed a bug resulting from some inconsistent previous optimizations which broke functionality of the /M switch.

• Fixed a bug in the previous version which prevented the detailed list from being generated. The source code included with that version is fine, but the binary must've ended up with some debug code in it which I had in place to help narrow down a separate issue. Oops!
• Fixed a typo in the readme file. Spoiler alert: "scren" isn't a word. At least not in English! ^_^
• Fixed the two compiler warnings. It's amazing what properly typecasting a pointer can do!
• Improved switch handling logic.
• Improved the layout of trailing blank lines after the various sections of information which ListVESA dumps.
• Optimized code; redundant bits were moved to a separate function, VESAModeInfoGet().
• Tweaked the "incompetent VBIOS manufacturer" message a bit to flow better and take up less space in the binary.

• Added a "summary" mode - with accompanying /S switch - to be a bit more terse if desired.
• Added dates to the changelog. Woot woot!
• Added more detailed output for the Memory Model field instead of simply printing the type code.
• Changed Frame Size calculation to "charsWide x charsHigh" for text modes. If someone out there encounters a text mode in the wild, I'd love to know how ListVESA does in reporting it!
• Fixed a bug where AX was not checked to be 0x004F after a mode info call. This fixes the spurious output of modes with all null values as found in the (somewhat crazy) data tables of some video hardware. This allows the previous "divide by zero" bug fix to be rolled back, as this fix supersedes it. Thanks Jerome!
• Fixed a bug where program help was included in the binary but no command line option would show it. Wow lol
• Hexadecimal numbers are now uppercase

RDisk

RDisk is a driver which creates a RAM-disk from up to 2 GB of XMS memory.

UDVD2

UDVD2 is a CD/DVD UltraDMA device driver. UDVD2 itself is now only useful for people who do not want caching or fast hard disk I/O, instead opting for a no-nonsense CD/DVD driver only. For any other situation, UIDE is preferred as it contains all the functionality of UDVD2 with the added benefit of read-ahead caching.

UHDD

UHDD is a disk-only caching driver for up to ten BIOS disks using up to four UltraDMA controllers.

UIDE

UIDE is a general-purpose caching driver for DOS drives, Floppy, CD/DVD, SATA and UltraDMA disks. The author notes that UIDE is better to save disk space, while UHDD + UDVD2 together allow for read-ahead, resulting in a faster experience.

XMgr

XMgr is an XMS manager which handles up to 4-GB of RAM and supports V3.70+ UMBPCI.