Compatibility¶
Apple Pascal - Disk 0.po¶
Does not boot. Loads some stuff from the disk then says "NO FILE SYSTEM.APPLE" or something like that. Same on both emulators.
fireworks.dsk¶
Apple II+.
FIREWORKS.BAS works (it's just applesoft).
hello + fireworks (B) does not work. It is apparently doing some crazy cycle-timed stuff, switching display modes using very tight timing. So this is "mixing video modes".
2/25/26: works as of mid-2025 with cycle-accurate-video implementation.
Crazy Cycles.dsk¶
This is intended for Apple IIe only. hangs on boot waiting for VBL. Then it hangs trying to read C070 - which is likely supposed to return "floating bus" value. At least, it does in OE.
This works now.
crazy cycles 2.dsk¶
Apple II+.
when booting, displays "MB#" But disk is still running. it's loading a LOT? trying in OE it sounds like the head is scanning back and forth. Nothing happens. Same on OE with II+ and IIe. I guess this is just not working. in 0.3x, we don't even ever get off track 0, like it's not booting correctly.
This works now, though we're a few cycles off in the VideoScanner.
2/25/26: this works perfectly now
Mad Effects #2¶
another french touch demo - this one synchronizes the mb timers to vbl (works on either ntsc or pal). It does not play right at all. So there must be something wrong with my handling of: when VBL takes effect, or MB timing specifics. I'm actually wondering about the vbl timing. Also, possible phantom read stuff.
the source code is at https://github.com/Fr3nchT0uch/Mad_Effect_2/blob/main/main.a
they do a lot of their cycle counting inside the interrupt handler, so this will be a doozy!
This doesn't play right. This may rely on the very detailed specifics of mockingboard interrupt timing that we don't have quite correct right now.
four_voice_music.dsk¶
A random collection, but the most interesting thing here is a demo program that plays 4 voice music pieces. Comparing OE to GS2, GS2 is accurately replicating some extremely high frequency harmonics. The overall tone is a little buzzier, but we know that already.
keywin.2mg¶
OE does not support .2mg files. Does not boot on GS2, disk spins forever and no visible boot process proceeds. This is an 800k .2mg disk. Still won't boot on GS2.
Lode Runner¶
works in OE. in GS2, we throw a bunch of "unknown opcode" errors on the value 0x80. What if we don't halt but just skip the instruction? ok, well now it's starting up. looks good actually. there's no audio... OE has audio. according to Claude you can toggle the speaker by hitting any address in C030 to C03F. I added that to GS2, and still no audio in Lode Runner. there is lode runner disassembly at github. Weird. So Control-S enabled audio. Seems like maybe there is some reason sound is disabled by default?
timelord.dsk¶
gs2: prodos 8 v1.9 boots partially, cursor flashes over a . in the upper left, but does not complete booting. oe: boots and it's a pretty good synthesizer using the apple ii speaker.
Timelord now boots after the Disk II head movement fix.
applevision.dsk¶
works correctly.
prodos 1.1.1.dsk¶
Works in GS2, but: "Display slot assignments" shows "USED" for slots that don't have stuff in them. It should read "EMPTY". It thinks there is a 80 column card in slot 3. That ain't right. It thinks the slinky card is a "PROFILE". (This is correct for Prodos 1.1.1).
The issue with this could be that we are supposed to be reading floating bus values when c100-c1xx is read and there is no card in it. We should have a page table setting for "floating". And then pick a bit of display memory at random and return those values. ("At random" in other emulators would be based on where the display update virtual beam scan is. We don't do it that way. )
Slot 1 is showing up as correctly "EMPTY" now, since (long-ago) work to implement floating bus behavior.
ProDOS1.9.po¶
This crashes on boot at address 0x0914 in both GS2 and OE, on both II+ and IIe modes. I think this disk image is bad (or has a interleave problem). A different ProDOS 1.9 disk I found works correctly.
ProDOS_2_4_3.po¶
Works in II+ on OE. Hangs during boot on GS2 after showing the prodos splash screen. Drive light is still on. Will need to trace this and see what's going on. Is supposed to work on Apple II plus and standard 6502. So who knows what is going on.. Though, OE II plus seems to have an 80 column card that activates on PR#3. Now working just fine.
Locksmith¶
6.0¶
"Scan Disk" is not working. locksmith ability to quarter track isn't going to work the way the code is written now. 16 sector fast disk claims "address" field is missing on every sector and track. I wonder if this is all due to lack of quarter-track support. This did not work in the previous iteration of the code either. All the 16-sector utils now work (format, verify, etc.) Nibble copying does not.
5.0¶
nothing working here either. It's never turning the disk drive motors on. it must be doing it some different way. probably same status as 6.0.
Glider¶
This boots far enough to say "LOADING GLIDER..." but then hangs. Docs say on a II+ it requires a mouse. hard looping at $0E86. This is a tight loop BIT $C019 BMI $0E86. I.e., it's looking for NOT VBL. Then it looks for VBL, and exits when it has seen VBL not and then VBL plus.
The Apple II plus did not have the VBL register. So this software not compatible with Apple II plus!
Glider now boots, but, keyboard control doesn't work - it's reading $C010 and expecting the keypress to be there. ok that has been fixed. And it works with the mouse card emulation as well, though the mouse is overly sensitive as it is in shufflepuck.
Wall Street¶
reads a couple tracks then fails with:
Unknown opcode: FFFFFFFF: 0xFA
we're looping on jmp (3f0) -> FFFF -> BRK.
This works now after fixing the CarmenSandiego stack wrap problem.
Clue¶
boots and is working, but, disk drive continues running inappropriately. With recent ndiskii changes, works perfectly. (Drive turns off, lol).
Classic Concentration¶
Dies during game load with gazillions of unknown opcodes. last instructions before crash are sta c003 sta c005 - looks like a //e 128k game. With current state of IIe, it now boots, loads, plays music. But it is a double hi-res program, so the display isn't right yet. getting there, but still wrong. (was working)
was working, however with cycle-accurate video, we are in some mode that is not causing the display to update. (did I break double hires?)
2/25/26: (works fine now)
Bouncing Kamungas¶
A to enable atari joystick. Mockingboard automatic. works great now.
Karateka (Brutal Deluxe crack)¶
seems to be working quite well! (fixed inability to run by updating joystick code)
Alien Typhoon¶
in paddle mode, even when joystick is still, the paddle reading is very jittery. There are a few other games where this occurs too.
Ascii Express¶
Ascii Express 3.46 loads. Of course, we don't have any serial ports on here right now. But, it also boots up into 80 column mode when it sees the Videx Videoterm! ha!
Wizardry¶
if there's a Videx, wizardry (aka Pascal) turns it on. Then all you see is the Videx screen. Huh. there's a whole video from Chris Torrance about this. Works fine on //e.
Epyx Preview Disk¶
baseball ok. Winter Games, something's not right, is it trying to double-buffer and it isn't triggering correctly? Is now working ok in IIe mode.
Skyfox¶
working as of 0.3x with mockingboard support. both standalone disk version and version on Total Replay. Was a language card problem.
Rescue Raiders¶
boots - get the demo screen. 's' to start. terrorists have been found at Cherbourg - then it sits in a loop at 8147 - I put a 0 in address $59 a few times and it started workingish. at least I have animation, if not audio. ah ha! This is why: https://comp.sys.apple2.narkive.com/7TzX1OSL/rescue-raiders-v1-2-and-1-3-questions here's the manual for reference: https://archive.org/details/rescueraidersusersmanual/page/n17/mode/2up Requires speech synthesis support for Mockingboard. Alternately, might need to tweak something so it doesn't think we have a speech chip.
Total Replay¶
boots up detects 64K and mockingboard and then thinks "and it talks!" . uh. wrong. but lots of the games on it work, including Rescue Raiders. Correctly detects 128K + joystick in apple //e mode, but then hangs waiting for VBL to appear. ok, VBL is on and Total Replay boots to menu now.
Carrier Aviation¶
seems to work. don't know how to play :)
Shufflepuck¶
needs: Mouse; VBL; gets past VBL check, but still dies on no mouse. Working with mouse-in-progress. Needs VBL. Also used hires-with-nodelay mode. Working quite well with all items addressed.
Cybernoid Music Disk¶
works, but has lowercase. 4.0 version is Prodos 2.0.3 needs enhanced apple iie. [works now] "DOS3.3" is Cybernoid 5.0, works. wants a mockingboard. Mixing is not great. After mixing change (pre-0.5) plays significantly better. The noise amplitude might be a bit on the high side.
Apple Cider Spider - 4am crack¶
works with mockingboard. game controller not working with it? I thought it used to. weird. maybe I used the keyboard. In any event, it's doing a write to $C070 to reset. We're not handling that! Working now.
Apple II Bejeweled¶
Requires //e 80 column card. Works well.
Jumpman¶
crashes after loading a few tracks of data; then it has also gone back to C600 and jumps again to $0801 which is an RTS which then wreaks various havoc, gets to a BRK, and ends up in monitor. Boots now, and "plays", but there may be an issue with the joystick. only seems to be able to go up and left.
The gamecontroller timer used to be 2800 cycles. now I set to 2805 cycles, based on the PREAD routine 11 cycles * 255. Controls in jumpman work now.
Ultima IV¶
Works and supports Mockingboard on II Plus. Now works with Mockingboard on IIe.
Ultima V¶
Is now booting on IIe emulation with 128K. I should stick a Mockingboard in it and see if it works! It doesn't. ha! Fixed a bug in MB with new mmu routines for c1cf, still doesn't work. Fully implemented T2 counter and interrupt; still no dice. Bug fix 12/12/25, mockingboard C (at least) now works.
AppleWorks 1.3¶
on 2mg disk. Boots right up, but, needs 80col support. There is now 80 col support and it now works! (0.35+)
ProTerm 2.2 on 143K¶
boots prodos, but crashes to a brk at 8ab0. Might require enhanced IIe. Does want enhanced iie. boots, says confirm hardware, hit ESC to continue but just loops asking for keyboard input.
Zork I¶
works great. uppercase only.
Hitchhiker's Guide to the Galaxy¶
works, asks if you want 80col mode. Would probably provide lowercase then.
Nox Archaist Demo¶
Nox Archaist Demo hdv from the apple2ts source tree boots - but then hangs on C019 waiting for a VBL that will never come.. The VBL has now come! Why would it care about vbl? Don't know. Gets boot screen, plays the "Nox archaist" voice, and some mockingboard music. Then hit a key, and it dies with the PC in ZP and ALTZP on.
Well, it stops running correctly on Apple2TS also. Maybe the Demo just stops there.
OH. NO IT DOESN'T. This actually goes to a game screen now. I have no idea what I did to fix this; however, the stack overflow thing might be it.
Berzap¶
boots. ctrl-c lets you configure mockingboard and atari joystick. there might be an attempt at speech which doesn't work of course. use mockingboard A in settings as C assumes there's a speech chip and we hang later. (only uses one ay chip, 3 channels for music, sound effects in the other speaker?)
Cyclod¶
once the maze comes up, you have to hit enter to start. control-@ (control-shift-P, or control-shift-2) and F6 to enable joyport.
Where in the World is Carmen Sandiego¶
This was broken due to pop_word not properly handling stack wraparound inside the word. Now working to boot. However, it won't accept side B. Trying the 4am crack. Yes, this is working fine.
Space Quest¶
after pirate splash screen, the 80 col firmware goes wrong by jumping to ($3ED) in a little different way each time. on II+ gets into a keyboard loop with nothing on the screen. Also hangs in Mariani.
4am crack boots ok but then hangs after title cards on text screen. it's wanting you to press a joystick button. I do that, and I get hgr again with "turn the disk over".
Get the same doing help. It's displaying the wrong text page. I manually do c054 and I get the help screen. it's flipping between C054/C055 a lot, while drawing some graphics. This must be doing double hires.
This is now fixed!
Popeye¶
This wasn't working at one point, it would just reboot cycle. (I think this tries to run past track 35). However, now it is, and, it's playing some Mockingboard music to boot. The mockingboard output is just a little bit clicky in parts. I wonder if I should keep track of the mockingboard channels samples available, maybe I'm not quite sending out enough samples there? Hmm.
It asks if I have a mb; then displays hires garbage, but playing music; hit a key, and it loads the game.
MousePaint¶
trying to read from mouse using I/O hooks which I don't support yet.
Xtra8bit¶
looks like it's trying to in#4 to read mouse.
Total Replay¶
AirHeart¶
crashes after doing some STA C081,X; STA C082,X; STA C083,X. that is lang card stuff and maybe phantom-read stuff. This is due to something confusing our drive for a smartport, and jmp'ing to $Cx63 which is not a valid entry point in our code.
The -regular- version of Airheart works fine.
TR seems to be seeing our device, assuming it's a SmartPort, and calling a nonexistent routine. (FIXED)
Arkanoid¶
This has same problem as Airheart. (FIXED)