Notes updating

src/mame/drivers/saturn.c

@@ -23,8 +23,8 @@ TODO:
 - IC13 games on the dev bios doesn't even load the cartridge / crashes the emulation at start-up,
   rom rearrange needed?
 - SCU DSP still has its fair share of issues, it also needs to be converted to CPU structure;
-- Add the RS232c interface (serial port), needed by fhboxers.
-- Video emulation bugs: check stvvdp2.c file.
+- Add the RS232c interface (serial port), needed by fhboxers (accesses some ports in the a-bus dummy range).
+- Video emulation is nowhere near perfection.
 - Reimplement the idle skip if possible.
 - Properly emulate the protection chips, used by several games (check stvprot.c for more info)
 - Move SCU device into its respective file;
@@ -32,53 +32,28 @@ TODO:
 
 (per-game issues)
 - stress: accesses the Sound Memory Expansion Area (0x05a80000-0x05afffff), unknown purpose;
+
 - smleague / finlarch: it randomly hangs / crashes,it works if you use a ridiculous MCFG_INTERLEAVE number,might need strict
-  SH-2 synching.
-- groovef / myfairld: why do we get 2 credits on startup? Cause might be by a communication with the M68k
+  SH-2 synching or it's actually a m68k comms issue.
+
+- groovef: ugly back screen color, caused by incorrect usage of the Color Calculation function.
+
 - myfairld: Apparently this game gives a black screen (either test mode and in-game mode),but let it wait for about
   10 seconds and the game will load everything. This is because of a hellishly slow m68k sub-routine located at 54c2.
   Likely to not be a bug but an in-game design issue.
-- danchih: hanafuda panel doesn't work.
-- findlove: controls doesn't work? Playing with the debugger at location $6063720 it makes it get furter,but controls
-  still doesn't work, missing irq?
+
+- danchih / danchiq: currently hangs randomly (regression).
+
 - batmanfr: Missing sound,caused by an extra ADSP chip which is on the cart.The CPU is a
   ADSP-2181,and it's the same used by NBA Jam Extreme (ZN game).
+
 - vfremix: when you play as Akira, there is a problem with third match: game doesn't upload all textures
   and tiles and doesn't enable display, although gameplay is normal - wait a while to get back
   to title screen after losing a match
 
-===================================================================================================
+- vfremix: various problems with SCU DSP: Jeffry causes a black screen hang. Akira's kick sometimes
+  sends the opponent out of the ring from whatever position.
 
-Hardware overview:
-------------------
--two SH-2 CPUs,in a master/slave configuration.The master cpu is used to
-boot-up and to do the most of the work,the slave one does extra work that could be
-too much for a single cpu.They both shares all the existant devices;
--a M68000 CPU,used to drive sound(the SCSP chip).The program is uploaded via the
-SH-2 cpus;
--a SMPC (System Manager & Peripheral Control),used to drive all the
-devices on the board;
--a SCU (System Control Unit),mainly used to do DMA operations and to drive interrupts,it
-also has a DSP;
--an (optional for the ST-V) SH-1 CPU,used to be the CD driver;
--An A-Bus,where the cart ROM area is located;
--A B-Bus,where the Video Hardware & the SCU sections are located;
--Two VDPs chips(named as 1 & 2),used for the video section:
- -VDP1 is used to render sprites & polygons.
- -VDP2 is for the tilemap system,there are:
- 4 effective normal layers;
- 2 roz layers;
- 1 back layer;
- 1 line layer;
- The VDP2 is capable of the following things (in order):
- -dynamic resolution (up to 704x512) & various interlacing modes;
- -mosaic process;
- -scrolling,scaling,horizontal & vertical cell scrolling & linescroll for the
-  normal planes, the roz ones can also rotate;
- -versatile window system,used for various effects;
- -alpha-blending,refered as Color Calculation in the docs;
- -shadow effects;
- -global rgb brightness control,separate for every plane;
 
 ****************************************************************************************************/
 

src/mame/drivers/stv.c

@@ -632,32 +632,6 @@ DRIVER_INIT_MEMBER(saturn_state,danchiq)
 	m_minit_boost_timeslice = m_sinit_boost_timeslice = attotime::from_usec(5);
 }
 
-/*
-060011AE: AND     #$0F,R0
-060011B0: MOV     #$5E,R1
-060011B2: ADD     R5,R1
-060011B4: MOV.B   R0,@R1
-060011B6: MOV     R5,R0
-060011B8: ADD     #$70,R0
-
-060011BA: MOV.B   @(R0,R4),R0 <- reads 0x02020000,cause of the crash
-060011BC: RTS
-060011BE: NOP
-060131AA: CMP/EQ  #$01,R0
-060131AC: BT      $0601321C
-060131AE: CMP/EQ  #$02,R0
-060131B0: BT      $0601324A
-
-TODO: understand where it gets 0x02020000,it must be 0x0000000
-
-bp 6001d5a
-bp 6001d22 (60ffef0)
-
-
-(?) wpset 60cf888,4,r
-
-*/
-
 DRIVER_INIT_MEMBER(saturn_state,astrass)
 {
 	sh2drc_add_pcflush(machine().device("maincpu"), 0x60011ba);
@@ -830,7 +804,7 @@ DRIVER_INIT_MEMBER(saturn_state,smleague)
 	DRIVER_INIT_CALL(stv);
 
 	/* tight sync to avoid dead locks */
-	m_minit_boost = m_sinit_boost = 0;
+	m_minit_boost = m_sinit_boost = 5000;
 	m_minit_boost_timeslice = m_sinit_boost_timeslice = attotime::from_usec(5000);
 }
 
@@ -841,7 +815,7 @@ DRIVER_INIT_MEMBER(saturn_state,finlarch)
 	DRIVER_INIT_CALL(stv);
 
 	/* tight sync to avoid dead locks */
-	m_minit_boost = m_sinit_boost = 0;
+	m_minit_boost = m_sinit_boost = 5000;
 	m_minit_boost_timeslice = m_sinit_boost_timeslice = attotime::from_usec(5000);
 }
 
@@ -857,12 +831,9 @@ DRIVER_INIT_MEMBER(saturn_state,maruchan)
 
 DRIVER_INIT_MEMBER(saturn_state,pblbeach)
 {
-	//sh2drc_add_pcflush(machine().device("maincpu"), 0x605eb78);
+	sh2drc_add_pcflush(machine().device("maincpu"), 0x605eb78);
 
 	DRIVER_INIT_CALL(stv);
-
-//  m_instadma_hack = 1;
-
 }
 
 DRIVER_INIT_MEMBER(saturn_state,shanhigw)