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Forum: support.Games 06 December 2021, 18:45
Replies: 10
Views: 4,738
Posted By slingshot
Thanks for the info. I can make it work, but I...

Thanks for the info. I can make it work, but I was wondering if the in-game calibration function is broken. Actually all Microprose games I tried suffer from this problem, including F19, F117A and...
Forum: support.Games 25 October 2021, 21:35
Replies: 10
Views: 4,738
Posted By slingshot
I resurrect this old thread (sorry for that), but...

I resurrect this old thread (sorry for that), but is Alt+J works for anyone to calibrate the joystick? Without calibration, only a very small range is usable (like 0-30, where ~15 is the center). A...
Forum: support.Hardware 04 October 2020, 01:01
Replies: 2
Views: 504
Posted By slingshot
The converter accepts 50 Hz, the display doesn't....

The converter accepts 50 Hz, the display doesn't. A proper scaler which does framerate conversion, too is a bit more expensive.
Forum: News 03 October 2020, 14:44
Replies: 78
Views: 18,426
Posted By slingshot
Or maybe the main problem is that the stacked PC...

Or maybe the main problem is that the stacked PC is at the middle of the DIVS instruction (40850004).
Forum: News 03 October 2020, 14:40
Replies: 78
Views: 18,426
Posted By slingshot
Here's another, which I don't understand. DIVL.L...

Here's another, which I don't understand. DIVL.L expects a CHK expection? Then OK: No exception generated. I would expect an 5, as D1 is zero.


DIVL.L (default):
DIVL.L/0000.dat (default). 0......
Forum: News 20 September 2020, 11:13
Replies: 78
Views: 18,426
Posted By slingshot
I see. Seems the lower 3 bits are reset. Without...

I see. Seems the lower 3 bits are reset. Without your CPU tester, these bugs would never come to the surface.
Forum: News 19 September 2020, 22:46
Replies: 78
Views: 18,426
Posted By slingshot
Hmm, but where the 2018 value comes from? ...

Hmm, but where the 2018 value comes from?
Registers after:
SR: 801f/2018 PC: 0087ffa0 ISP: 00860800
T1=1 T0=0 S=0 M=0 X=1 N=1 Z=1 V=1 C=1
It looks like 801F from the detailed flags, which is...
Forum: News 19 September 2020, 21:58
Replies: 78
Views: 18,426
Posted By slingshot
These two issues are remaining with exceptions: ...

These two issues are remaining with exceptions:
DIVU.W (default):
DIVU.W/0000.dat (default). 0...

0087ffa0 84c1 divu.w d1,d2
0087ffa2 4afc illegal
S 0088201a...
Forum: News 19 September 2020, 21:11
Replies: 78
Views: 18,426
Posted By slingshot
Thanks! I've already added SFC and DFC...

Thanks! I've already added SFC and DFC storing/retrieval. Currently I'm fighting with some stack frame issues, then I'll try to implement MSP/ISP/M-bit.
Forum: News 19 September 2020, 17:20
Replies: 78
Views: 18,426
Posted By slingshot
Would be interesting to know which one sets the M...

Would be interesting to know which one sets the M bit. I only found some which set MSP but never set the M-bit. Don't ask me why.
Actually implementing ISP (x)or MSP would be not too hard, but...
Forum: News 18 September 2020, 20:42
Replies: 78
Views: 18,426
Posted By slingshot
Yes, I just didn't found any software (including...

Yes, I just didn't found any software (including Amiga OS) which sets the M bit, where the difference between ISP and MSP counts. Or I just looked for it in a bad way...
Forum: News 18 September 2020, 20:00
Replies: 78
Views: 18,426
Posted By slingshot
Thanks for the info! Yepp, MOVEC is only...

Thanks for the info!

Yepp, MOVEC is only partially implemented, everything else than VBR, CACR and USP is not doing anything.
Forum: News 18 September 2020, 16:05
Replies: 78
Views: 18,426
Posted By slingshot
Is it possible to run the tests with relocated...

Is it possible to run the tests with relocated VBR? I suspect that something wrong with that in the TG68K softcore, would be good to run the tests with a non-zero value.
Forum: Coders. Asm / Hardware 19 November 2019, 18:15
Replies: 8
Views: 1,789
Posted By slingshot
6526 doesn't work as CIAA because of the Oneshot...

6526 doesn't work as CIAA because of the Oneshot mode difference (when Kickstart writes to Timer A HI byte, the timer don't start, and it waits forever). But it wasn't tried with real chips, just...
Forum: Coders. Asm / Hardware 17 November 2019, 20:56
Replies: 8
Views: 1,789
Posted By slingshot
No, I mean internal timings. E.g. after a...

No, I mean internal timings. E.g. after a register write, when the timer actually starts to tick, when it's reloaded exactly and so on. There are a lot of tests for cycle-accuracy of the CIAs in C64,...
Forum: Coders. Asm / Hardware 17 November 2019, 01:45
Replies: 8
Views: 1,789
Posted By slingshot
Then I wonder if a 8520 in C64 passes the Lorenz...

Then I wonder if a 8520 in C64 passes the Lorenz CIA tests (except oneshot). Or the VICE tests (is it has the same timings as the 6526/8521)?
Forum: Coders. Asm / Hardware 16 November 2019, 23:34
Replies: 8
Views: 1,789
Posted By slingshot
CIA 6526/8521/8520 differences

I searched, but still didn't found a comprehensive list about the differences of the models. What's known by me:
- TOD is binary on 8520 / BCD on others
- Just found this: writing to the timer hi...
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