Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07212 Graphics Minor Always Jan 25, 2019, 05:13 13 days ago
Tester ICEknight View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Driver msx.cpp
Version 0.205 Fixed in Version Build 64-bit
Summary MESS-specific 07212: mpc100 and other PAL machines in msx.cpp: Wrong PAL aspect ratio
Description Found some footage captured from a PAL Sanyo MPC-100 MSX machine which shows a different aspect ratio to what the emulated PAL MSX 1 and MSX 2 machines display in MAME:


Tested with mpc100 (PAL MSX 1), svi738sp (PAL MSX 1) and mlg3 (PAL MSX2).
Steps To Reproduce This doesn't really require a specific game for testing, but in case that you want to test the one in the video:

-Cassette: Load "phantis" from the software list, set it to "cass 2 (side B)" from the File Manager and type run"cas:
-Disk: Load "phantis" from the software list, type run"phantis2.bas

Enter the 18757 password and press E in the menu to start the game
Additional Information May be related to issues #5622 and #5623.
There's other videos in that channel using other games and MSX models, such as this one (Philips NMS 8250 MSX2):
Flags Verified with Original
Regression Version
Affected Sets / Systems mpc100 and other PAL machines in msx.cpp
Attached Files
png file icon phantis original.png (690,573 bytes) Jan 25, 2019, 05:13 Uploaded by ICEknight
Aspect ratio from recorded footage
ICEknight
png file icon phantis mame msx 1.png (486,468 bytes) Jan 25, 2019, 05:14 Uploaded by ICEknight
MAME (MSX 1)
ICEknight
png file icon phantis mame msx2.png (245,658 bytes) Jan 25, 2019, 05:14 Uploaded by ICEknight
MAME (MSX 2)
ICEknight
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Notes
5
User avatar
No.16072
hap
Developer
Jan 25, 2019, 16:30
I don't know how accurate his video capture card is, but yes, PAL has a different aspect ratio than NTSC. This isn't specific to PAL Sanyo MPC-100 MSX.

For 80s/90s consoles(and MSX1 too), Europeans not only suffered the video slowdown due to 50hz, but a flattened aspect ratio as well.
User avatar
No.16081
ICEknight
Tester
Jan 27, 2019, 01:15
Yeah, forgot to add "PAL" in the title. Fixed.
User avatar
No.16083
hap
Developer
Jan 27, 2019, 17:44
My point is that this issue isn't "mpc100 and related", nor specific to msx.cpp.
User avatar
No.16169
ICEknight
Tester
23 days ago
So I specified "and other PAL machines in msx.cpp" in the title now, would this be the correct way to report systems where the PAL version is being displayed with the NTSC aspect?
User avatar
No.16223
hap
Developer
13 days ago
edited on: 13 days ago
No, there is nothing to fix in the msx.cpp driver. It affects all Japanese/American-made systems where due to the higher number of display lines with PAL compared to NTSC, the aspect ratio(of the active display area) is about 20% flatter. Megadrive, SNES, Playstation, etc.