tasks.txt

NES

Fails on CPU blargg test 5 unofficial opcodes SXA
TODO: Sprite DMA needs to react on instruction complete, not the instant the register is written to


SNES

The M and X flags are always equal
to one in the Emulation mode. When an interrupt occurs during the Emulation
mode, the Break flag is written to stack memory as bit 4 of the Processor
Status Register.

During the Emulation mode, the Stack Pointer high-order byte
(SH) is always equal to 01. The Bank Address is 00 for all Stack operations.

Does emulation mode cause 8 bit wrap around on zero page addressing?

TSC: While in 6502 emulation mode a one will be transferred to the hidden B (upper 8 bits) accumulator because the stack is always located at page one in 6502 mode.
Dont understand??

TCS: Should the top 8 bits of the stack pointer be cleared in this instance?

Check mapping behaviour of AMS_ABSOLUTE_INDIRECT_DIRECT

need to decrement program bank register if going below zero when jumping?
set data bank register with MVN/MVP?


Should BRL / other branch commands cross program bank boundaries? Apparently old branch commands behave the same as 6502


 When switching from 8 to 16 or 16 to 8 bit index register, the high byte of either X or Y will be come zero.
Needs doing - uses same status register in emu - While in emulation mode (E=1) bit 4 is the B BRK flag bit. [While in emulation mode, bit 5 is not present.]
[The stack pointer is returned to eights bits with the high byte forced to one and the high byte is lost.]

	
 1A      INC     Accumulator (INA)              1       2 |
	62      PER     Stack (PC Relative Long) 
	D4      PEI     Stack (Direct Page Indirect)   2       6 | 2

	 check JMP/JSR addressing
	 

Have zero clock cycles:
WDM
MVP
MVN

Dynamic clock cycles need doing

signature byte for brk / cop
confustion over ADC how it behaves in 8bit acc mode
BIT does not store overflow / carry flags in immediate addressing
COP native mode decimal flag should be cleared after execution
JML - subtract program counter (already been incremented before call?)

got as far as jumps / LDA



=====================================================

Tests failing:

cli_latency_tests #3
APU should generate IRQ when $4017 = $00

Fails all mmc3_irq_tests tests

Fails nes_vbl_nmi_tests #07 : 55259094

Fails nes-stress PPU test 2: sprites on all

Fails all pal-apu tests

'Paltest' has jittery lines when i guess its not supposed to

'scanline' test passes first 2 tests but cant read third line - confirm on other emu to test

'stretch.nes' has jittery lines, confirm behaviour


Current testing:

Got to usa\Batman Returns (U)

/////////////////////////////////////////

- monitor writes to CHR rom pages and only save the ones that have changed to disk on state save

done: initial state implementation
done: input broken on nestress
done: scrolling
DONE: account for CPU cycles taken for sprite DMA (1 for read, 1 for write = 512 cycles)
DONE: Fix big sprite issue in "burger time"
DONE: sprite issue in "lunar pool"
DONE: foreground->RunTo() method
DONE: optimise ^^
DONE: fix sprite issue not being aligned with background in ms. pacman & burgertime: suspect scrolling issue
DONE: use tile id from vramaddress for background render
done: implement sprite & background clipping
done: sprite hit detection - use pre-render buffer
done: APU support
DONE: fix palette colours - balloon fight logo should be orange not blue
DONE: savestate support
FIXED: ppu frame tests fail after loading a few roms - state not properly being reset - possible not reseting cpu ticks on reset?
FIXED - need way of setting priority buffer for sprites - sprite zero not being correctly identified
DONE - remove subcycle and affect parameters from memory reads
DONE - remove boost shared_ptrs from mainboard components and make the global pointers instead
DONE - replace if() tests with asserts for pointer testing
DONE - use IS_INT_BETWEEN in cpumemory.cpp
done - replace internalports in ppu with bitfield
DONE - replace CPU status reg with bitfield
done - remove mutable ppu data members
DONE - make palette part of PPU
DONE - mappers need to set state on reset
DONE - wxLog, wxLogTextCtrl & wxLogWindow - use for logging?
FIXED - japan\gyrodine (helicopter changes colour)
FIXED - usa\donkey kong (marios face changes colour on second level)
FIXED - allowing more than 8 sprites on a scanline fixes this - mapper1\usa\abadox - sprites flicker when many on a line
FIXED - mapper1\usa\chessmaster
FIXED - mapper1\usa\clash at demonhead
FIXED - mapper1\usa\desert commander - resets on start game
FIXED + mapper1\usa\Clash At Demonhead (U).nes - supposed to be black background on text in intro screen? - yes
FIXED - individual mappers need to save state (reboot on die hard (U) after reloading save state - patterns messed up - see 65EEC6E7_1.savestate on desktop)
FIXED - Ironsword - Wizards & Warriors 2 (U).nes - shaky status bar (mapper #2, must be spritezero hit detection problem)
DONE - save all options on options dialog close (also set current options on load)
DONE - use Reset event on mainboard, hook all components on that, stop recreating all components on reset & reload
DONE - look into zapper code
DONE: fix status register errors in nesstress CPU tests
DONE - move all joystick stuff from cpumemory into proper class
DONE: properly clear memory on cold reboot

/////////////// debug ideas

- sprite & bg tile numbering
- separate opengl context so can render nametables & palette on tother window


high: monochrome + emphasis support
high: mega man 3 issues: http://nesdev.parodius.com/bbs/viewtopic.php?t=212 <- 513 cycles for DMA??
high: sort out dont allow writes to PRG & CHR ROM
high: sound IRQ & CLI latency implementation
- tidy up sprite DMA transfer & optimise

low pri: iNES trainer support: http://nesdev.parodius.com/bbs/viewtopic.php?t=1804

high: add own assert() method to be turned on / off via #define
high: assert on renderbuffer->prioritybuffer and any memory pages

multidirectional scrolling test - fix flickering issue on bottom bar

mapper4\usa\Dirty Harry (U) - looks like it resets / incorrect PRG swap when attempting to pass intro part. works on nintendulator

mapper4\usa\Baseball Stars 2 (U) - interlaced background, either tile pre-fetch error or mmc3 timing
mapper4\usa\Base Wars (U) - lines on intro text - probable mmc3 timing issue
mapper4\usa\gauntlet.nes - strange error, when playing first level all walls are in wrong place, works on nintendulator
mapper4\usa\Gun Nac (U) - messed up chr table on intro
mapper4\usa\Kid Klown (U) - same again, messed up chr tables
mapper1\usa\Treasure Master (U).nes - breaks when trying to pick up the boots on the upper platform, first level (probable prg switch error)
mapper4\usa\Incredible Crash Dummies, The (U) - shaking scrolling bar

mapper69\usa\Batman - Return of the Joker (U) - black intro screen, no music plays, but press start and it goes ok

FIXED - mapper1\usa\day dreamin davey - scrolling issue, shaking
FIXED - mapper1\usa\bases loaded 2 - scrolling issue (again)
FIXED - mapper1\usa\cool world - scanline mess on status bar at bottom during play
FIXED - mapper1\usa\Treasure Master (U).nes - shaky status bar, and breaks when trying to pick up the boots on the upper platform, first level (probable prg switch error)

mapper1\usa\Mutant Virus, The (U) - suspected incorrect prg switch when starting a new game

mapper2\usa\3-D Battles of World Runner, The (U) - slalom-style line artifacts on scrolling, probably due to incorrect tile fetch timing

mapper3\usa\Adventures of Dino Riki (U) - black screen at start when intro supposed to display. music plays, works on nemulator
	- mapper is so simple, suspected not a mapper issue

FIXED - mapper1\usa\talespin - introduction, mother head sprite problem

mapper1\usa\indiana jones last crusade (taito) - black lines on introduction screen
mapper1\usa\heavy shreddin - shaking: fixed, but still seems to have a glitch in top-right - happens in Nintendulator
mapper1\usa\hudson hawk - sprites screwed on play

mapper4\usa\Flintstones 2 - The Surprise at Dinosaur Peak!, The (U).nes - Status bar shaking - possible mmc3 scanline counter or sprite0 hit
mapper4\usa\Bram Stoker's Dracula (U).nes - status bar shaking
mapper4\usa\Code Name Viper (U).nes - status bar shaking (uses mapper4 irq)

FIXED - usa\Arkanoid (U).nes - doesnt respond to input ( needs arkanoid controller?)

mapper4\usa\Gun Nac (U).nes - title screen messed up
mapper4\usa\Werewolf - The Last Warrior (U).nes - black screen on play, but music keeps playing - chr rom problem?

usa\Rampart (U).nes - black screen
usa\George Foreman's KO Boxing (U).nes - black screen

mapper1\usa\Knight Rider (U).nes - black distortion on right side of track, looks like tile prefetching timing problem. note other artifacts such as garbage line
	on intro and on horizon are present is FCEXP and nintendulator

usa\super cars - mirroring messed up? This rom uses illegal opcode LAX, crashes on nintendualator and nemulator.

# mapper #66

- japan\Booby Kids (J).nes - black screen
- japan\Chester Field - Ankoku Shin heno Chousen (J).nes - black screen
- usa\Black Bass USA, The (U).nes - black screen mapper #66


usa\Athletic World (U).nes - freezes on play
mapper1\usa\Back to the Future 2 & 3 (U).nes - black sprites - possible chr rom bad swap or transparent pixel bug
mapper0\japan\door door - freeze when start and collides with other character - probable sprite0 hit problem

mapper1\usa\sesame street 123 - pattern tables messed
mapper4\usa\Astyanax (U).nes - messed up CHR tables
mapper4\usa\Super Mario Bros 3 (U) (PRG 0).nes - messed up status bar at bottom during play - possible sprite0 / mapper4 issue?
mapper4\usa\alien 3.nes - black screen when starting game
mapper4\usa\Baseball Stars 2 (U).nes - messed up pattern tables on bottom on load
FIXED - mapper4\usa\Conquest of the Crystal Palace (U).nes - no status panel on bottom of screen - most likely mapper timing issue

mapper2\world\Fantastic Adventures of Dizzy, The (Aladdin) (UE).nes - shakes occassionaly on status bar - possible sprite0 issue? - doesn't happen in nintendulator

/// mapper7 problems - probable timing issues - all of these occur in nintendulator

mapper7\usa\Caesar's Palace (U).nes - floor messed up. dont know whats going on - possible to do with apu irq
mapper7\usa\classic concentration - messed up background on contestants when they match a prize
FIXED - mapper7\usa\WWF Wrestlemania (U).nes - messed up ring
mapper7\usa\Time Lord (U).nes - shakes when loads of sprite on screen - suspected sprite zero being affected by sprite priority handling code. 

FIXED - bug: save states on joysticks - need to specify which ones are plugged in at the time of saving

--------

INCORRECT MAPPERS ( happens on nintendulator too )

mapper7\usa\Castle of Deceit (U).nes - black screen - mapper 11, but background broken - maybe another mapper??
LEAVE - fcexd cant do this either - mapper7\usa\death bots - black screen on start play 

--------

mapper1\usa\Thunderbirds (U) - blue line over narrators head in briefing, doesnt happen on nintendulator

FIXED - usa\Alien Syndrome (U).nes - blank screen when attempt to start new game
+ new problem - sprites seem messed when starting a new game, suspected pattern table problem
+ nothing else works when fix applied (divide 2k bank ids by 2 - breaks everything else. Problem happens in nintendulator, leave)

FIXED - europe\battletoads - PAL shaking on play, intro ok
FIXED - mapper0\usa\mario - sprite hit zero freeze when jumping off high block into clouds on level 1-1
FIXED - mapper0\usa\slalom - tile corruption on right side during play
usa\Al Unser Jr Turbo Racing (U) [a1].nes - same problem as knight rider
usa\treasure master - jumping off top off screen causes black screen & mess at bottom of status bar

usa\Adventures of Dino Riki (U).nes - black screen
usa\Teenage Mutant Ninja Turtles 2 (U).nes - black screen
mapper1\usa\dragon warrior 3 & 4 - blank screen
mapper1\usa\ghengis khan - mmc1 - black screen - uses VRAM
mapper1\usa\bill and ted - black screen

mapper0\japan\f1 race - sides of track not supposed to be red, same with mapper0\japan\exerion - bottom supposed to be green, not red

mapper4\usa\Power Punch 2 (U).nes - messed up sprite on intro, doesnt accept keys

- look into apu code and fix frame limiter

sprite missing in mapper0\japan\b-wings - gun middle missing on weapon selection, also middle of ship missing

Test mapper #8
[ Several hacked Japanese titles use this mapper, such as the hacked version of Doraemon. ]

+ mapper #11
[ This mapper is used on several unlicensed Color Dreams titles, including Crystal Mines and Pesterminator.
	I'm not sure if their religious ("Wisdom Tree") games use the same mapper or not. ]
+ mapper #13 (videomation)
DONE, DONE + mapper #15 (no support for 8k prg switching - TODO, incomplete)
+ mapper #17 [ Several hacked Japanese titles use this mapper, such as the hacked versions of Parodius and DragonBall Z 3. ]
 + mapper #66, 78, 69 (IRQs!)
 + mapper #6, implement IRQ overflow thingy majig for FFE games ( http://nocash.emubase.de/everynes.htm )
 
DONE - add support for 1k + 2k VROM switching, and 8k prg
- dont allow writes to VROM
DONE - dont automatically setup VRAM in default mapper

- add option to set power-up state (currently cpuram all set to zero)


wxZipInputStream - read from zip files