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- Excession!
-
- Echo - previously known as oidsemu
-
- Version 0.3beta (0.1+0.2 with a few MORE fixes !)
-
- This program is a preview of an Atari ST emulator - therefore it's full of bugs and should only be run at your own risk!
-
- Make sure you have a soundblaster compatible sound card, and 16bit vesa video card before running this program
- A ROM-dump of the Operation System is needed and should be called
- tos.img in this directory.
-
- Press F11 to bring up a really dodgy menu (it'll be better in the next
- version!)
-
- For the interested -
- This version emulates the following parts of an Atari ST/STE
-
- (generally speaking 50% complete emulation - )
-
- Motorola
- 68000 - at approx. 8 mhz (you may need to increase this to
- run some games)
- There are many bugs in the core, and alot of work needs to be
- done with cycle counting (for the obvious ... ;)
-
- Shifter - All video modes, no overscan yet. Cycle accurate shifter
- emulation is not enabled in this version (I haven't sorted out my dodgy VAP register code ..)
- IKBD - lots of things done, lots of things still to do (especially
- midi) - in mouse key mode pressing 2 buttons at the same time
- doesn't work (needed for Megalomania)
-
- MFP - Most things emulated, I haven't looked at priorities much
-
- Interfaces (printer, serial, midi, etc) - Not yet!
-
- Disk (FDC) - read/writing (so be warned !) - seems to work ok (but can
- crash the emulator if a duff image is used)
-
- Hardisk (gemdos emulation) - Very buggy, most things work but may or
- may not do strange things. Different Tos version will do
- different things (probably).
-
- Yamaha Sound - still need to improve emulation - a volume control
- can be found somewhere in the menus - use this mostly
- to tweak sound sample replay emulation. Samples
- and normal yamaha sound don't work concurrently - this
- will be fixed sometime!
- Check "Adaptive Sound" to improve sample sound
- quality in a few games (Llamatron STFM, xenon,
- Captain Blood etc)
- Let me know if you want this to work in your favourite
- game (it may crash if it doesn't work!)
-
- DMA sound (STE) - stereo sound works, but is lacking proper timer A
- tiggering
-
- Microwire (STE) - registers emulated (roughly), doesn't affect sound.
- DMA&yamaha not concurrent.
-
- Blitter - Emulated, but probably doesn't work! no attempt has been
- made for co-op/hog mode emulation
-
- Bugs
- ----
-
- When switching vesa mode, ST memory is corrupted (don't know why!)
- Volume control (mostly used for my own use) only with yamaha sound.
- Disk changing (the media change is not implemented when switching
- disks - so be careful)
- Crashing with invalid disk images
- IKBD (and/or PC keyboard routines) - these routines need improved, it's
- annoying in oids when the emulator (or oids) doesn't detect key
- releases and/or presses :(
- * Actually - I think I fixed this now (silly Ikbd timing !)
- No joystick support (I don't have one !) - you're stuck with the arrow
- keys and right-ctrl !
-
-
- Lots of games don't run, lots of demos don't run.
- Try WinSTon or Pacifist if you can't get a game to run (but I guess
- you know that already !)
-
- Approx size of this project !
- 1.9 MB (50 files) of source code of which
-
- 130K used for CPU/BLitter code generation
- 850K generated cpu code
- 300K generated blitter code
- 700K Emulator code
-
- not including header files, or dos specific (Vesa, Soundblaster) code
- A lot of the code is not enabled/used in this version.
-
-
- Hellos to Damien Burke, and whoever is creating a Falcon Emulator ;)
-
- Write to me (I like postcards!) -
-
- Nick Madsen
- Flat 2/2
- 349 Tantallon Road
- Glasgow
- G41 3HJ
- Scotland
-
- if you like this emulator or would like something fixed !
-
- 13/12/1998 00:45
-