MAME SVN History

199869 Revisions

r91026 Friday 2nd February, 2018 at 08:52:03 UTC by Vasantha Crabb
Workable Stepping Stage driver, and recently dumped VJDash [Naibo] Workable stepstag driver: -Added fundamental communication between main 68000 and (undumped) Windows PC -Figured out correct logic of data uploading from main CPU to (maybe an FPGA on some unknown board) -Discovered proper V-blank frequency of 4 logigal screens(routed to 3 physical screens in real hardware), which effects the communication and synchronization between 2 68000 CPUs, thus affect booting -Borrowed foreground graphics from vjdash, added proper foreground layer handling, and removed hack code -Seperated palette and decoding of 3 screens, and added independent 3rd screen decoding/drawing routine, as each screen has their own palette, and may display totally non-related graphics -Corrected sprite rom loading of step3 -Mapped dancing floor light, spot light, neon light, and key led output, based on some video footage of real arcade machines -Corrected NVRAM handling -Adjusted key-mapping of foot step input port, avoided key conflict -The in-game palettes are in 8-BIT YUV(UYUY) format. Each entry may contains 2 pixels. In the real game hardware, the sprites are to be mixed with a MPEG-1 under-layer, then converted together to RGB Driver for the recently dumped Vjdash (a 4-monitor game): -Figured out that vjdash uses similar hardware to Stepping Stage -Identified graphics roms of fg/bg/rotation layers -Been able to boot to self-test, thus mapped inputs -In addition to the currently obtained board, this game also needs a 2nd 68000 board which drives 3 upper screens, and one Windows PC, like in Stepping Stage series. -This board may have 2 more (missing?) ROM ICs, for sprites

r91026 Friday 2nd February, 2018 at 08:52:03 UTC by Vasantha Crabb

Workable Stepping Stage driver, and recently dumped VJDash [Naibo]

Workable stepstag driver:
-Added fundamental communication between main 68000 and (undumped) Windows PC
-Figured out correct logic of data uploading from main CPU to (maybe an FPGA on some unknown board)
-Discovered proper V-blank frequency of 4 logigal screens(routed to 3 physical screens in real hardware), which effects the communication and synchronization between 2 68000 CPUs, thus affect booting
-Borrowed foreground graphics from vjdash, added proper foreground layer handling, and removed hack code
-Seperated palette and decoding of 3 screens, and added independent 3rd screen decoding/drawing routine, as each screen has their own palette, and may display totally non-related graphics
-Corrected sprite rom loading of step3
-Mapped dancing floor light, spot light, neon light, and key led output, based on some video footage of real arcade machines
-Corrected NVRAM handling
-Adjusted key-mapping of foot step input port, avoided key conflict
-The in-game palettes are in 8-BIT YUV(UYUY) format. Each entry may contains 2 pixels. In the real game hardware, the sprites are to be mixed with a MPEG-1 under-layer, then converted together to RGB

Driver for the recently dumped Vjdash (a 4-monitor game):
-Figured out that vjdash uses similar hardware to Stepping Stage
-Identified graphics roms of fg/bg/rotation layers
-Been able to boot to self-test, thus mapped inputs
-In addition to the currently obtained board, this game also needs a 2nd 68000 board which drives 3 upper screens, and one Windows PC, like in Stepping Stage series.
-This board may have 2 more (missing?) ROM ICs, for sprites

[src/mame]	mame.lst
[src/mame/drivers]	tetrisp2.cpp
[src/mame/includes]	tetrisp2.h
[src/mame/layout]	stepstag.lay vjdash.lay*
[src/mame/video]	tetrisp2.cpp

https://github.com/mamedev/mame/commit/8f28cf2426732dac3fb548d43c0b8f81624e890b

199869 Revisions