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- Some Frequently Asked Questions. Please read this carefully if you have
- problems.
-
- Q: Will there be a Windows version?
- A: I'll never write a non-commercial program for DOS/Windows again. I hate
- having to reboot after mistakes.
- I included the DOS port because a) a DOS version can achieve similar
- speeds as the Linux/SVGA version b) it didn't messify too much of the code,
- and c) more people told me they would port it to DOS and I wanted to save
- them the effort. I don't think a Windows port will fit in as cleanly as the
- DOS port, nor do I think it can be efficient. If you want, you can try to
- prove me wrong, but I will be very reluctant to include Windows code. The
- same goes for code to support a bazillion soundcards for DOS, or similar
- nightmares.
-
- Q: Is it possible to read Amiga disks with a PC?
- A: Ask that in comp.emulators.misc :-) The answer is: NO! Unless you invent
- and build some extra hardware yourself, which no one appears to have done
- yet.
-
- Q: Couldn't I attach an Amiga floppy drive to the PC somehow, and use that to
- read Amiga disks?
- A: You can attach Amiga (low-density) drives to the PC, because they are
- completely identical to PC drives. This won't help you, because the problem
- is not the drive, but the PC floppy controller. You have to live with it.
-
- Q: The linker says "final link failed: Bad value"
- A: Please upgrade your Linux installation with the latest files that you find
- on sunsite.unc.edu:pub/Linux/GCC, but read the release_* files carefully
- before you install anything. It seems that a linker bug causes this
- problem. The package you need is binutils-2.6.0.2 or better.
-
- Q: What about sound emulation in the DOS version?
- A: I won't do it. Maybe someone else has the time. Get a real OS.
-
- Q: How can I change diskfiles?
- A: Read the "Installation" section in the README to find out what you need to
- use the X GUI.
-
- Q: The "configure" script does not find Tcl/Tk, but I have it installed!
- A: The script checks for an executable called "wish4.0". There is currently
- no better test. Unfortunately, this executable is not always present,
- even though Tk 4.0 is installed. If that is the case, find the "wish"
- executable, go into the directory where you found it and type
- "ln -s wish wish4.0" (provided you have write rights in that directory,
- i.e. you are super-user). Then go back to the UAE directory, remove the
- file config.cache and rerun "configure". That should do the trick.
-
- Q: Is it possible to read Amiga harddisks with a PC?
- A: Yes. Linux 2.0 has an Amiga filesystem that can reportedly read Amiga
- OFS/FFS harddisks. You can in theory also mount .adf diskfiles, but I've
- had problems when I last tried that. YMMV.
-
- Q: When UAE starts up, it says "Illegal instruction: 4e7b". Why?
- A: That's normal, it's just the Kickstart CPU type test.
-
- Q: When UAE starts up, it says "Illegal instruction: 00f8" (many times). Why?
- A: That's because your Kickstart ROM was compiled for the 68020.
-
- Q: When UAE loads <insert your favourite game> it says "Non-standard sync".
- A: Your favourite game is copy-protected. There are ways to transfer such
- disks, but it's complicated and I won't help you because it would be much
- too time-consuming to figure out all sorts of copy-protection schemes.
- I hope there will be a general solution some day, but for now you're
- unlucky.
-
- Q: While it compiles, it says "xxx illegals generated" or "16 mismatches".
- Is this a problem?
- A: No. I can use this information to tell whether there is a problem, and
- there isn't.
-
- Q: Why is there a blank area on the left side of the screen?
- A: The Amiga can display graphics there, but usually doesn't because this
- would disable some sprites. The area is only used by some overscan demos.
- Normal screens are off-center. I'm not going to do anything about that.
- If you can't stand it, you can try to use 320x200 resolution, which will
- attempt to center the screen. This is near impossible to get right for
- every program. If your screen doesn't fit in 320x200, use 800x600.
-
- Q: Benchmark program <insert your favourite benchmark> gives weird results.
- A: Amiga programs run by the emulator think the Amiga timers can be used to
- measure real time. But in UAE, they only measure "emulation time". Sysinfo,
- for example, gives the same results on all machines. So don't run
- benchmarks to test the emulator speed.
-
- Q: Wasn't this called the Unusable Amiga Emulator?
- A: Yes. But no one thought the name was very fitting anymore, though. It was
- only really appropriate for v0.1, which couldn't even boot.
-
- Q: Sometimes, after UAE exits, there is no autorepeat for the keys!
- A: Do "xset r on" (happens only in X, apparently mainly on Solaris boxes.
- Dunno why.).
-
- Q: Would it be possible to speed it up by emulating the CPU native on, say,
- a 68k Mac?
- A: I doubt it. UAE needs to be able to interrupt the CPU emulation anytime to
- perform tasks necessary for emulating the hardware.
-
- Q: Wouldn't it be better to translate MC68000 code to x86 assembly?
- A: Yes. It would also be slightly more difficult.
-
- Q: Emulating all the hardware is a bad idea. Why don't you just emulate the
- OS? After all, that's what makes the Amiga the Amiga.
- A: Short answer: I disagree.
- Long answer: The OS is half of what makes the Amiga the Amiga. It is a very
- nice OS, and there are some features that I miss in any other OS, but it is
- also severely lacking in terms of (for example) memory protection and
- filesystem performance.
- The other thing that made the Amiga special back in the 1980s is the custom
- chip architecture. If you look into old (1985) computer magazines, you will
- find that the capabilites of the Amiga OS are only mentioned as a side
- note, because people were not aware that it was revolutionary for a home
- computer. They were aware, though, that the Amiga could display 4096 colors
- at the same time and that it had a blitter and a copper that could do all
- sorts of stuff, like bouncing balls for instance. And I think it was the
- superiority of the hardware that made the Amiga a success.
- I see UAE as a program that is similar to C64 emulators: it allows you to
- run some old games and other programs that you can't replace with better
- equivalents on the PC. As such, it can already be used to run non-action
- games (like Monkey Island or Bard's Tale) at a satisfactory speed. Faster
- CPUs will eventually make it possible to run action games, just like faster
- CPUs have made it possible to emulate a C64 at full speed on a PC. UAE is
- not (primarily) meant for the Amiga PowerUser who is running high quality
- applications on his A4000 with a 68060 board, but for people like me who
- switched from an A500 to the PC a few years ago because they wanted to make
- money by developing software.
- Besides, emulating an OS is far more difficult IMHO. Especially if the
- platform you are emulating it on is completely different than the platform
- that is being emulated. You'd have to mess with endianness conversions and
- other nightmares. The AmigaOS wasn't designed with portability in mind
- either.
-
- Q: How can I transfer non-DOS disks that are used by many demos?
- A: With transdisk. The fact that they are unreadable by AmigaDOS does not
- mean they are unreadble by transdisk. Only copy-protected disks can't be
- transferred that way.
-