Supercharger

Version Française



I like it, and don't know why.
Have a look at the Supercharger Plus
The never released x286 extension!


Some DOS programs I wrote with executables and sources.

What's in the box? What is it for?

It's a box inserted in the DMA/ACSI chain. The mother board is built around a NEC V30 8Mhz (the best 8086 compatible), a slot for a FPU 8087 and 1Mb RAM. It's a really good PC XT emultor.

A "parasite" card on the Atari:
  1. CPU NEC V30, 8MHz (8086 enhanced), I pushed it up to 10MHz replacing the 24MHz clock with a 30 one.
  2. 1Mo Ram
  3. optional 8087, I have it!
  4. Graphic modes CGA (320x200 or 640x200) and Hercules (720x348)
  5. supports mouse, serial, parallel
  6. Supports Atari and Ms-dos floppies (360K to 1.44M)
  7. Supports Atari partitons < 16 Mo
  8. Can create and use a MS-DOS bootable partition
What is it for?
  1. A PC XT Emulator
  2. A Ramdisk 1Mo
  3. A parallel coprocessor working with the 680x0.
  4. Test your FPU 8087.
  5. 10 Mhz overclocking.


Working as an emulator:

Pushing it to its limits, you can make it work with PC DOS 7, a MS-DOS 6.22 clone. It also can run the PC GEM system, similar to TOS GEM but in an older version.
Publisher, PC Gem system, Hercules mode.
You can also use Windows 2.03. For that last, I couldn't find any software except the Othello game and the Write text editor. This means that you can type your text with proportional fonts and print it with your Supercharger. Well, but... there is Windows 3.00a that is no problem!
Windows 3.0 running Write, the control panel and my setup.


The global reactivity is really correct, only some problems with th double clic. I have to clic once and to use Enter to validate my choice.

Games with Windows 3.0, 8 balls in JezzBall and it's not over!
These are the common programs I used succesfully: maths (derive, Cabri Géomètre, SMAO), programming (Turbo Pascal 6, Turbo C 2, Quick basic, A86, Logo), tools (pkzip, RAR, LHA, Pctools, disk compression with Stacker).

Working as a RamDisk:

A little tool came with the Supercharger turning it into a 1Mb unit. When you have a hard disk, this is not worth. But with a simple ST, it gives you a real comfort when you copy files, when you uncompress a ZIP or if you want to keep your Speedo/NVDI fonts always accessible. I have been able to use Script or Atari Works with one floppy and the Supercharger.

Working as a coprocessor:

It's the "top" use of it. The NEC V30 and the 680x0 can work together and exchange data. This requieres a bit of Intel programming... that can be the "bad" side of it.
I wrote some articles about this system (in french), download them.
You'll surely want to get the programs that illustrate the articles.

Test your FPU 8087:

Hard to know if an application uses your brand new FPU 8087. Here is a little
program that actually uses the FPU (asm source code is included). It calculates and draws an image of the Mandelbrot fractal in CGA or Hercules mode.
For CGA, type setvideo C and run fractcga.com.(Runs on any PC, even under Windows XP!)
For Hercules, type setvideo H and run fracther.com.


Here is the result in CGA after a quarter of an hour (depth 240, not improved with the visible symetry to be adaptable to other coordinates).


10MHz overclocking:

You just have to unsolder the initial 24MHz quartz and to replace it with a 30MHz one. That's what I did. But I wanted to go farther and made a complicated system with a switch and 3 quartz: 24MHz to get the original speed, 30 to get 10MHz and 36 to get 12MHz. This system was a bit unstable, so I only let one quartz in it. But, I put a fan over the CPU and FPU. This is very stable with a TT overclocked to 48MHz.



15 décembre 2007