Brian Gaff - BG Services

Chris Pile (one half of Digital Reality)

1991 (17.7 KB) (6.92 KB) (1.2 KB) (289.91 KB)

Pro-Dos could be thought of as a Disk Operating System (DOS), However, it is more than this , it is a full Operating System that Provides compatibility with CP/M 2.2.

In simple terms this means that a whole world of software that was designed to run under CP/M 2.2. will now run on the SAM Coupe. Pro-Dos uses the same Disk format as the Amstrad PCW 8256 and, as A result, can read disks from this machine direct, this also Means that there is a vast range of software already available from sources such as Public Domain libraries.

When buying software from a Public Domain library you must check That it was designed to run under CP/M 2.2 or one of the lower versions, 1.4 for example. Some software will only run under the later versions of CP/M, commonly known as CP/M 3 or CP/M Plus. However, the majority of available software is 2.2 compatible and You should have no trouble running it under Pro-Dos. Some software may need “installing” for the particular machine You intent to run it on, this normally involves terminal (or Screen) configuration and sometimes disk data information, most Software includes full configuration instructions and it is Usually a simple task.

Pro-Dos runs totally independent of the SAM ROM and DOS and, as a Result , makes no ROM or SAMDOS calls. Therefore, Pro-Dos will Run on any SAM with any version of SAM or MasterDos. Indeed, to Boot Pro-Dos from its boot disk you do not need to have Pre-loaded SAM or Master Dos at all. Pro-Dos automatically adjusts itself to your particular machine, be it a 256k single drive, or a 512k twin drive system, system ensures that it makes the best use of the RAM and drives available.

Version 2 updates & improvements.

Pro-DOS v2.0 - Features
Better CP/M 2.2 compatibility
Up to eight simultaneously visible disk drives - Drives A:through to H:
Compact Flash support using the ATOM-Lite (right-hand drive bay)
Dual CF adapter support in the ATOM-Lite - seen as two separate drives
MMC/SD/SDHC flash support using Quazar’s Trinity Ethernet Interface
100% compatible with the AL-Patch format
Pro-DOS can optionally boot from its own format 720k CP/M disks
If your SAM has an AL-BOOT ROM Pro-DOS can also boot from CF cards
Up to 64-Gigabytes (65535 logical disks) on CF/MMC/SD/SDHC cards
Will use any external RAM packs to provide up to four 1MB RAM Drives
Improved performance, with particular attention paid to screen output
More accurate Heath/Zenith H19/Z19/DEC VT52 terminal emulation
Better command-line editing functions
Command-line can accept user areas - so DIR A4:*.COM is valid
Can simultaneously change drives and user areas at the command prompt
MS-DOS-like command history buffer for the eight most recent commands
Retro green-screen look with funky flashing cursor - changeable of course!
Will save/restore your chosen screen colours to/from the Trinity EEPROM
System bell sound makes a better “ding” and no longer pauses the system
The DIR command now outputs in alphabetically sorted columns
Better memory use to allow v2.0 to retain v1.9’s internal RAM Drive sizes
A large (63238 byte) Transient Program Area for external programs
The separate system files disk used by v1.9 is no longer required
All system files are pre-installed to the internal RAM Drive at boot
COPY and DUMP commands are now built-in, and not external programs
All internal commands accept wildcards, including REName and COPY
Ability to software-swap a pair of drives, so A:can be B:and vice versa
FATREAD.COM for importing files from PC formatted FAT12/16/32 media

PDF Manual Scan at

Pro-Dos review from INDUGS Format Vol 5, No 9 by John Wase.

There seems to be a message written to a CP/M formatted disk with the Pro-dos Format command. The message is written to a reserved track on the floppy. See the screen shot below. - spt August 2007

See the Sam Coupé Pro-Dos [CP/M 2.2] Resource Pages maintained by Steve Parry-Thomas.

Also See FDOS CP/M Public Domain Library for CP/M software for use with Pro-Dos.

Digital Reality

were the developers of the program - well, one half of Digital Reality, as Balor (the other half) was working on Astroball around the same time.

The program was actually published by Spectrum luminary Brian Gaff - under his BG Services guise.

Pro-DOS v2.0

A recent (May 2014) complete rewrite and much improved version of Pro-DOS (known as Pro-DOS v2.0) is available on Steve Parry-Thomas’s Pro-DOS website.

The author has released v2.0 as Freeware so perhaps the .ZIP archive available on Steve’s website should be made available on here too?

Pro-DOS V2

I agree so I have uploaded zip file with the disk image.

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