Blitzen 0.3
===========
By Peter Gordon (pete()petergordon.org.uk)
Blitzen is a blitter emulator for OS4. It attempts to impliment enough of the
functionality of the classic Amiga blitter to make a few more old programs
run on OS4 systems without the classic chipset (IE AmigaOne).
The following is currently emulated:
- Ascending and descending copy operations with shift
- Descending mode fill operations with shift
- Line mode (not tested)
- End of DMA interrupt for apps using SetIntVector()
- The 68k "WaitBlit" function is patched to wait for the emulated blitter
What is not emulated:
- Ascending mode fill operations (the hardware reference says they don't work
properly, and I don't currently know what happens if you try it on the real
hardware).
- End of DMA interrupt for apps abusing the 68k VBR
You can run blitzen at any time, and quit it with Ctrl-C.
| |