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Forum: Coders. Asm / Hardware Yesterday, 23:00
Replies: 14
Views: 543
Posted By jotd
bsr is only useful if you call your routine from...

bsr is only useful if you call your routine from more than one location.

It's also good for readability... the bigger your routine is, the lower the overhead (using stack to store return address...
Forum: Coders. Asm / Hardware 21 January 2021, 09:43
Replies: 7
Views: 325
Posted By jotd
we often use vpos wait instead of cia timer wait....

we often use vpos wait instead of cia timer wait. Easier and doesn't change the cia states.
Forum: support.WinUAE 20 January 2021, 22:02
Replies: 14
Views: 761
Posted By jotd
as you said before, even if FPIAR is updated more...

as you said before, even if FPIAR is updated more than it should, that allow FPSP to work. In other cases we don't need it.

I'll suppose you'll publish a new beta when it's ready.
Forum: support.WinUAE 19 January 2021, 22:08
Replies: 14
Views: 761
Posted By jotd
The game has 100% integer arithmetic version and...

The game has 100% integer arithmetic version and 68881 based FPU versions. No 68040+FPU version exist.

68040 & 68060 don't have 68881 but it can be emulated by software. 680x0.library does that,...
Forum: Amiga scene 18 January 2021, 23:23
Replies: 498
Views: 26,276
Posted By jotd
Sorry, I can't let you say that the CD32...

Sorry, I can't let you say that the CD32 controller is great

Original CD32 controller sucks! The D pad ages badly, rubber falls off and D-pad rotates, making games unplayable. But KTRL-CD32 is a...
Forum: support.Hardware 18 January 2021, 23:21
Replies: 24
Views: 987
Posted By jotd
same issue with 68060 Blizzard A1260 when game...

same issue with 68060 Blizzard A1260 when game code is located in chip memory... slower than running on 68020...
Forum: support.Apps 17 January 2021, 22:29
Replies: 13
Views: 425
Posted By jotd
ok, I had a quick look. 2 possible reasons: ...

ok, I had a quick look. 2 possible reasons:

- pirated whdload key somewhere on your system (L:, S:, C:...). Whdload is now free from any keys, but it still looks for some and if it finds a pirated...
Forum: Games images which need to be WHDified 17 January 2021, 22:04
Replies: 251
Views: 23,931
Posted By jotd
just use the no-FPU slave if you don't have a...

just use the no-FPU slave if you don't have a FPU. It's the best and only option.

@angus: the no FPU code box should just make things slower. The underflow issue is more a problem. It means that...
Forum: support.Games 17 January 2021, 15:13
Replies: 3
Views: 179
Posted By jotd
nope no dice. Thanks anyway.

nope no dice. Thanks anyway.
Forum: Games images which need to be WHDified 17 January 2021, 15:00
Replies: 251
Views: 23,931
Posted By jotd
For 68030+FPU I recommend TFX.020 which has FPU...

For 68030+FPU I recommend TFX.020 which has FPU 68882 support and it's the most recent build we have that works. No need for my patches (they're not active) except for the chip/fast hunk patch.
Forum: support.Games 17 January 2021, 12:24
Replies: 3
Views: 179
Posted By jotd
sierra resource.cfg language option

I've seen this in many sierra german "resource.cfg" games:




language=49



That starts the game in german default. But some of those games also can run the game in english. Except that we...
Forum: support.Games 17 January 2021, 12:21
Replies: 4
Views: 292
Posted By jotd
If JIT is set, games really behave oddly. No real...

If JIT is set, games really behave oddly. No real amiga can match that speed, and too much fixing is needed in that mode. I'm set on "fastest possible" no JIT.
Forum: support.Games 17 January 2021, 10:30
Replies: 4
Views: 292
Posted By jotd
what you're experiencing is a game programming...

what you're experiencing is a game programming error. You have to set "approximate A1200 speed" to make games run like vanillia A1200.

I've fixed a lot of those in a lot of games (Populous, ...)....
Forum: Games images which need to be WHDified 17 January 2021, 01:43
Replies: 251
Views: 23,931
Posted By jotd
uploaded a new version of the slave in the zone....

uploaded a new version of the slave in the zone. Some FPU operations have been patched manually rather than relying on Motorola FPSP emulation.

Running on 68060. Not sure if it improves compared...
Forum: support.WinUAE 17 January 2021, 00:45
Replies: 6
Views: 239
Posted By jotd
oh you already know "H"... read too fast. There's...

oh you already know "H"... read too fast. There's also the "il" command that can breakpoint on interrupts. You can specify mask. Just ... a lot of values to try because the command doesn't tell you...
Forum: Retrogaming General Discussion 17 January 2021, 00:42
Replies: 99
Views: 19,541
Posted By jotd
Not nice, specially because he had access to the...

Not nice, specially because he had access to the original code and rewrote it in C/C++/whatever.

without the original code he'd been left with f*ck-all.

(maybe not for Richard Joseph wrote the...
Forum: support.WinUAE 17 January 2021, 00:22
Replies: 6
Views: 239
Posted By jotd
Easy way to debug that. First set a...

Easy way to debug that.

First set a breakpoint at 0, then set history to for ex 100:


f 0
H 100


run your code/reboot/whatever, reach the breakpoint. Using H again you can see which...
Forum: support.WinUAE 16 January 2021, 14:07
Replies: 14
Views: 761
Posted By jotd
There are definitely FPU calls in the loop. ...

There are definitely FPU calls in the loop.

Beside the trigonometric calls, there are 2 only unsupported calls types:

FINTRZ (rounding)
FMOVECR (move rom constants)

I've checked the...
Forum: support.Apps 16 January 2021, 10:35
Replies: 13
Views: 425
Posted By jotd
emulation or real hw? post your config plz

emulation or real hw? post your config plz
Forum: support.Apps 15 January 2021, 15:14
Replies: 13
Views: 425
Posted By jotd
yes, that will work

yes, that will work
Forum: Amiga scene 15 January 2021, 11:17
Replies: 15
Views: 1,709
Posted By jotd
makes sense. The size argument part is deadly...

makes sense. The size argument part is deadly when emulated: on a 68040/060 it takes at least 20 instructions to decode the FMOVECR and put a real value instead.

Direct patching is better in that...
Forum: Amiga scene 15 January 2021, 09:46
Replies: 15
Views: 1,709
Posted By jotd
okay then nitpicking your Log1O(e) which should...

okay then nitpicking your Log1O(e) which should be Log10(e). That was just a quick copy/paste because the blurb below made me wonder about those undocumented values.

I just wonder what's the point...
Forum: Amiga scene 15 January 2021, 01:11
Replies: 15
Views: 1,709
Posted By jotd
user manual states Offset Constant $00...

user manual states


Offset Constant
$00 'IT
$08 L0910(2)
$OC e
$OD L092(e)
$OE L091O(e)
$OF 0.0
Forum: support.WinUAE 14 January 2021, 22:38
Replies: 14
Views: 761
Posted By jotd
yeah, impossible conditions can be seem as...

yeah, impossible conditions can be seem as undefined behaviour. Almost noone uses the FPU so even less people use illegal fpu opcodes just to detect if a real 060 is running.

ATM I'm going to try...
Forum: Games images which need to be WHDified 14 January 2021, 22:33
Replies: 251
Views: 23,931
Posted By jotd
I always used joystick in arcade mode

I always used joystick in arcade mode
Forum: Games images which need to be WHDified 14 January 2021, 22:04
Replies: 251
Views: 23,931
Posted By jotd
if you have an old install, just put the files in...

if you have an old install, just put the files in "data", and unpack the zone files onto it to complete it



I had tested FPU version with MuRedox in 060 config on WinUAE and it failed (plane...
Forum: Amiga scene 14 January 2021, 21:58
Replies: 58
Views: 2,409
Posted By jotd
Gods Chaos Engine Supercars 2 Magic Pockets...

Gods
Chaos Engine
Supercars 2
Magic Pockets
Z-Out

not the best games only my favourite ones.
Forum: Games images which need to be WHDified 14 January 2021, 20:57
Replies: 251
Views: 23,931
Posted By jotd
no, it should stay the same. Also running with...

no, it should stay the same. Also running with NOCACHE will slow it down even more. Yeah, I'd also wish there was a FPS meter... but there isn't.
Forum: Games images which need to be WHDified 14 January 2021, 20:23
Replies: 251
Views: 23,931
Posted By jotd
The objective was to get more speed on FPU...

The objective was to get more speed on FPU versions. The contrary seemed to happen...

if that's the case that's probably because FPU emulation (using trap) is slow, exception handling overhead and...
Forum: Games images which need to be WHDified 14 January 2021, 00:12
Replies: 251
Views: 23,931
Posted By jotd
it took you 5 minutes to answer. Were you in...

it took you 5 minutes to answer. Were you in traffic? :)
Forum: Coders. C/C++ 14 January 2021, 00:11
Replies: 3
Views: 222
Posted By jotd
fl->fileName = (STRPTR)fib->fib_FileName; ...

fl->fileName = (STRPTR)fib->fib_FileName;


that copies the pointer, which may be used for something else in the meantime. You have to duplicate the string.

change your structure so fileName is...
Forum: support.WinUAE 14 January 2021, 00:07
Replies: 14
Views: 761
Posted By jotd
fixed the next problem. Now TFX runs on a 68060...

fixed the next problem. Now TFX runs on a 68060 with that library. Not sure of the speed, though. Would slow FPU emulation still beat scalar math of the non-FPU executable?

I checked the source...
Forum: Games images which need to be WHDified 14 January 2021, 00:04
Replies: 251
Views: 23,931
Posted By jotd
Okay, after a few issues with the 68060 library...

Okay, after a few issues with the 68060 library (easy to rebuild, but problems to integrate) it was possible to upgrade the install to support 68060.

Check the zone for an updated beta package.
...
Forum: Retrogaming General Discussion 13 January 2021, 22:13
Replies: 143
Views: 6,993
Posted By jotd
Consoles aren't the easiest to program. But the...

Consoles aren't the easiest to program. But the results are often superiour. Of course you wrote amiga games for years. Developping for CD32 is probably a piece of cake for you (ok who botched...
Forum: Retrogaming General Discussion 13 January 2021, 21:54
Replies: 143
Views: 6,993
Posted By jotd
this comparison makes no sense. 256000...

this comparison makes no sense.

256000 colors: Most games on CD32 were 32 color OCS adaptations, not HAM games
2MB RAM: the RAM was filled by game code (Sega used cartridge ROMs)
multi-session:...
Forum: support.WinUAE 13 January 2021, 21:37
Replies: 14
Views: 761
Posted By jotd
thanks. That would be appreciated. I'll...

thanks. That would be appreciated. I'll workaround the issues for now to be able to make progress.
Forum: support.WinUAE 13 January 2021, 19:54
Replies: 14
Views: 761
Posted By jotd
makes sense, but that doesn't confirm the FPIAR...

makes sense, but that doesn't confirm the FPIAR WinUAE bug.
Forum: support.WinUAE 13 January 2021, 18:54
Replies: 14
Views: 761
Posted By jotd
FPIAR not updated on unsupported FPU instruction?

hi, probably a question that only Toni can answer,


Using the debugger, 040 or 060 config, obviously disabling emulation of unsupported instructions (where winuae does a great job) I get this:
...
Forum: support.FS-UAE 13 January 2021, 16:17
Replies: 13
Views: 701
Posted By jotd
I've never seen such things done in games.

I've never seen such things done in games.
Forum: Coders. Asm / Hardware 13 January 2021, 15:10
Replies: 9
Views: 499
Posted By jotd
looks fine to me (but hey I haven't written major...

looks fine to me (but hey I haven't written major Amiga titles). Maybe you want to analyse the frequency of the branch vs the non-branch. If it branches often, maybe use a bne and a bra so you're not...
Showing results 1 to 40 of 4927

 
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