QPC
 

 

Visitor no - since
31-01-2002

What is this QPC?

QPC is a software-only emulator that can turn a PC into a machine compatible to an old Sinclair QL computer. It is however far more advanced than the original "black box" you see here:

A Sinclair QL

The QL came out in 1984 and was (like the Atari, Amiga and Macintosh) based on the magnificent Motorola 68k processor series. It already had a graphics display and a very advanced operating system (QDOS) which included features like pre-emptive multitasking (PCs needed 10 more years to introduce that).

Tony Tebby, the original QDOS developer, did write a successor to the original QDOS system called SMSQ/E. While the first very early test versions of QPC were based on QDOS all official releases are based on SMSQ/E and profit hugely of its features like

  • Highly efficient pre-emptive multitasking
  • The popular SBasic programming language
  • Higher screen resolution (up to 4096x4096 is supported)
  • High colour (16 bit = 65536 colour) support
  • Pointer environment windowing system
  • Hotkey system
  • Toolkit II built in
  • Hard disc access (using a virtual hard disc file)
  • Floppy disc access (QDOS, TOS and MS-DOS format)
  • 8 serial ports with up to 115200 baud
  • 4 printer ports

QPC does not use any SMSQ/E version for native hardware, instead I adapted SMSQ/E (including all drivers) to QPC's needs so that both can work together as smoothly as possible.

Furthermore there are some features I specifically added for QPC like

  • Access to native PC drives ("DOS device")
  • Synchronization of Windows clipboard and Scrap extension
  • Control of audio CDs
  • Support for the SMSQ/E sampled sound system.

The emulation used is highly optimized and thus very fast. QPC1 for example is written in 100% assembler code! This version, however, suffers under some limitations of compatibility. It cannot run directly under Win95, Win NT, OS/2 or whatever. It requires a special DOS environment to work properly.

The situation has changed with the release of QPC2. This is a native Win32 application that runs happily under Windows 9x, ME, NT, 2000 and XP:

QPC screenshot

Interested? Get it here.

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