Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
04024 Graphics Minor Always Aug 27, 2010, 21:24 19 days ago
Tester robiza View Status Public Platform MAME (Self-compiled)
Assigned To Resolution Fixed OS Windows Vista/7 (32-bit)
Status [?] Resolved Driver toaplan2.cpp
Version 0.139u1 Fixed in Version 0.189GIT Build Normal
Summary 04024: ghox: Gfx glitchs in boot screen
Description Gfx glitchs in boot screen
Steps To Reproduce
Additional Information
Flags
Regression Version
Affected Sets / Systems ghox
Attached Files
png file icon 0000.png (5,221 bytes) Aug 27, 2010, 21:24
Relationships

-  Notes
User avatar
No.06627
Haze
(Senior Tester)
Aug 27, 2010, 21:43
edited on: Aug 27, 2010, 21:43
probably needs the code supplied by the z180, currently we just do an RTS instruction for it, it might clear sprite ram or such. If it's still present once the MCU is decapped and dumped I'll consider looking at it, but until then the simulation is highly questionable.

User avatar
No.06630
Tafoid
(Administrator)
Aug 27, 2010, 21:51
That blue part on the lower right started in 0.138u1. The little bit in the upper center .. as far back as 0.37b15 (first windows build) it's happened.

What would be nice is to see what is supposed to be drawn here.
User avatar
No.06632
Haze
(Senior Tester)
Aug 27, 2010, 21:57
edited on: Aug 27, 2010, 21:57
well it could be anything, as I said, the Z180 isn't dumped, and it provides code to the 68k, which could easily put something else there

/* Ghox 68K reads data from MCU shared RAM and writes it to main RAM.
       It then subroutine jumps to main RAM and executes this code.
       Here, we're just returning a RTS instruction for now.
       See above ghox_mcu_w routine. */

There is some handcrafted code in there to provide some functions, but I doubt it's been verified against the real hardware, and at the end of the day the Z180 dump is needed before sound will work anyway.

The Toaplan2 Z180 dumps are some of the 'essential' decaps that really need doing as a high priority. (I don't even think Guru / Dr. have a Ghox tho)

User avatar
No.14039
Haze
(Senior Tester)
19 days ago
MCU dump fixes this