04891: bankp: Palette problems

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04891	Color/Palette	Minor	Always	Jun 9, 2012, 09:09	Nov 9, 2016, 04:55

Tester	Kold666	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS
Status [?]	Confirmed			Driver	sanritsu/bankp.cpp
Version	0.146	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	04891: bankp: Palette problems
Description	On the original pcb the palette is different from MAME. The original flyers confirm this: http://flyers.arcade-museum.com/?page=flyer&db=videodb&id=1896&image=1 I have uploaded a video Also the music is noticeably faster than the emulated one. I checked the clocks and they are right.
Steps To Reproduce
Additional Information	Converted original attachment video:
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	bankp

Attached Files

No.08726 Fujix Administrator Jun 9, 2012, 11:18	The music speed sounds the same to me.
No.08727 Kold666 Developer Jun 9, 2012, 14:07	sorry it's not noticeably, but a little bit faster. If you have the chance to run the video in sync with mame you will notice it.
No.08728 hap Developer Jun 9, 2012, 14:20	"I checked the clocks and they are right." You'd need to measure video h/v timing for the music speed issue. MAME has: MCFG_SCREEN_REFRESH_RATE(60) Exactly 60Hz, that's not the right freq.
No.08730 Kold666 Developer Jun 9, 2012, 18:46	it's 61hz
No.08731 hap Developer Jun 9, 2012, 20:04	exact 61? :p .. and what about horizontal timing? If we have accurate measurements of h/v timing, we can usually determine video clock, number of lines, and number of clocks(pixels) per line.
No.08733 Kold666 Developer Jun 10, 2012, 08:07	H= 15.61khz V= 60,99hz My frequency counter has an error of 0,01 hz
No.08735 hap Developer Jun 10, 2012, 18:25	Thanks. As for the colors, I think most of the difference is due to screen contrast and saturation. But it wouldn't hurt to confirm the resistors near the color prom. The ones in video/bankp.c are currently based on assumption: --------------------------- Bank Panic has a 32x8 palette PROM (I'm not sure whether the second 16 bytes are used - they contain the same colors as the first 16 with only one different) and two 256x4 lookup table PROMs (one for charset #1, one for charset #2 - only the first 128 nibbles seem to be used). I don't know for sure how the palette PROM is connected to the RGB output, but it's probably the usual: bit 7 -- 220 ohm resistor -- BLUE -- 470 ohm resistor -- BLUE -- 220 ohm resistor -- GREEN -- 470 ohm resistor -- GREEN -- 1 kohm resistor -- GREEN -- 220 ohm resistor -- RED -- 470 ohm resistor -- RED bit 0 -- 1 kohm resistor -- RED
No.08754 Kold666 Developer Jun 11, 2012, 20:58	the only 8 resistances has the same values written in video/bankp.c One pin of each resistance is tied to +5V, the other pins go to a 74ls07, then to a 74ls273 and to the colour prom.