Difference between revisions of "Todo/Mysteries"

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m (BIOS seems to work fine without $380065/$380067. must have had bad burns before)
m (Added importance for NEOGEO chip sizes)
 
(47 intermediate revisions by 2 users not shown)
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==Registers==
+
==Housekeeping==
*What are $380011, $380061, $380065, $380067, and $3800E1 used for ?
+
* Merge Sprite_scaling with Sprite_shrinking
 +
* Rename GPU to VDC everywhere ? Or VDP ? LSPC isn't really a processor. Sorry :/
 +
* Rename BIOS to system ROM everywhere (done ?)
 +
* Use 3rd parameter of Sig template (signal polarity)
 +
* Use Chipname, Reg, Sig, BR templates
  
SP-E init code:
+
==Useful==
<pre>
+
* Tooltip extension for registers ?
move.b d0,$380065
+
* Check everything in [[Meg count]]. Add links to game pages.
move.b d0,$380067
+
* Add pin numbers on [[AES cartridge pinout]]
</pre>
+
* Add on to [[How to start]] page
 +
* Tutorials
 +
* Change DEFINE names (and register names ?) to the ones used in the AoF source code
 +
* Memory chip pinouts
 +
* Finish PRO chipset pinouts !
 +
* M1 and S1 ROM speeds
 +
* CD I/O ERROR 0001 0002 0003 ?
 +
* CRC32 of all known ROMs/ISOs from MAME's neogeo.inc
 +
* Add more jumper configs
 +
* Memory card stuff (format, banks...)
 +
* neo-mga on mv1a + PALs info
 +
* Chip functions for each kind of board (even discrete logic)
 +
* NEOGEO chip sizes, like pitch, span and body (useful for finding drop-in replacements like CPLD or Castellated pcb boards with replacement chips)
  
*CD registers
+
==Trivia==
 +
* Add links to TCRF pages for the debug DIPs of each game
 +
* CMC fix bankswitching: how/when is vram bank info sent to the cartridge?
 +
* Recent security chips info (SMA, PVC...)
 +
* Neo cd chip pinouts (not very useful)
 +
* Are the two missing FM channels from the YM2610 actually off the die or just disabled?
  
==Others==
+
==Analysis / mysteries==
 +
* Why does the L0 ROM need an output buffer ?
 +
* Loading time graphs for all CD games, is MESS reliable enough ? (no)
 +
* Details on CD registers
 +
* CDDA playback (needs more research in CD system rom)
 +
* Dump LC98000 version Neo CD system rom
 +
* [[LC8953]]/98000 microcode (note: Sanyo tech support has nothing left except publicly available brief sheet)
  
*[[LC8953]] microcode
+
==Verify==
 +
* Check [[Clock]] distribution diagram, especially on cart edge

Latest revision as of 10:48, 22 May 2020

Housekeeping

  • Merge Sprite_scaling with Sprite_shrinking
  • Rename GPU to VDC everywhere ? Or VDP ? LSPC isn't really a processor. Sorry :/
  • Rename BIOS to system ROM everywhere (done ?)
  • Use 3rd parameter of Sig template (signal polarity)
  • Use Chipname, Reg, Sig, BR templates

Useful

  • Tooltip extension for registers ?
  • Check everything in Meg count. Add links to game pages.
  • Add pin numbers on AES cartridge pinout
  • Add on to How to start page
  • Tutorials
  • Change DEFINE names (and register names ?) to the ones used in the AoF source code
  • Memory chip pinouts
  • Finish PRO chipset pinouts !
  • M1 and S1 ROM speeds
  • CD I/O ERROR 0001 0002 0003 ?
  • CRC32 of all known ROMs/ISOs from MAME's neogeo.inc
  • Add more jumper configs
  • Memory card stuff (format, banks...)
  • neo-mga on mv1a + PALs info
  • Chip functions for each kind of board (even discrete logic)
  • NEOGEO chip sizes, like pitch, span and body (useful for finding drop-in replacements like CPLD or Castellated pcb boards with replacement chips)

Trivia

  • Add links to TCRF pages for the debug DIPs of each game
  • CMC fix bankswitching: how/when is vram bank info sent to the cartridge?
  • Recent security chips info (SMA, PVC...)
  • Neo cd chip pinouts (not very useful)
  • Are the two missing FM channels from the YM2610 actually off the die or just disabled?

Analysis / mysteries

  • Why does the L0 ROM need an output buffer ?
  • Loading time graphs for all CD games, is MESS reliable enough ? (no)
  • Details on CD registers
  • CDDA playback (needs more research in CD system rom)
  • Dump LC98000 version Neo CD system rom
  • LC8953/98000 microcode (note: Sanyo tech support has nothing left except publicly available brief sheet)

Verify

  • Check Clock distribution diagram, especially on cart edge