nes microgame stuff

16 metatile types
8 sprite types
12 global variables
16x16 metatile map, no scrolling
maybe like 12 objects at once?

metatile defintions have:
  graphic (stored per metatile)

  attributes:
    palette used
    solid all flag
    solid on top flag
    user flag 1
    user flag 2
    user flag 3
    user flag 4

sprites definitions have:
  default art
  class (out of four)

  attributes:
    palette used
    stopped by solids
    solid

sprite state bytes:
  position X low
  position X high
  position Y low
  position Y high
  speed X low
  speed X high
  speed Y low
  speed Y high
  variable A
  variable B
  variable C
  user flags (8)
  type
  additional flags: x flip, y flip, just created, invisible
  ...
  ...

NES RAM map:
00xx - Variables
01xx - Stack and sound engine state
02xx - OAM buffer
03xx - Metatile map
04xx - \ Game state or initial state
05xx - /
06xx - \ Game information
07xx - /

CHR RAM map:
00xx - Interface stuff
01xx - Interface stuff
02xx - Chicago font
03xx - Chicago font
04xx - Chicago font
05xx - Chicago font
06xx - Chicago font
07xx - Chicago font
08xx -
09xx -
0Axx -
0Bxx -
0Cxx - User metatile graphics (0-3)
0Dxx - User metatile graphics (4-7)
0Exx - User metatile graphics (8-11)
0Fxx - User metatile graphics (12-15)
10xx -
11xx -
12xx -
13xx -
14xx -
15xx -
16xx -
17xx -
18xx -
19xx -
1Axx -
1Bxx -
1Cxx - User sprite graphics
1Dxx - User sprite graphics
1Exx - User sprite graphics
1Fxx - User sprite graphics

Nametable RAM map:
24xx - backup of the metatile map, copied here during gameplay and restored after
25xx -
26xx -
27xx -

Movement styles:
Player/Object 8 direction | directions allowed, walk speed, stopped by solids
Player/Object platformer  | walk speed, stopped by solids
Ball                      | applies an X speed and Y speed each frame

Conditions:
always
never
OR
NOT
every X frames
when [button] is pressed
when [button] is released
while [button] is pressed
when object was just created
is this touching [other object] (sets the other object as the other target)
is this touching [metatile type]
is this touching [solid/user flag 1,2,3,4] metatiles
compare object's variable to other variable


Actions:

Variable identifier:
NNNNnnnn
||||++++- source
++++----- destination
0: constant  8: G5
1: this A    9: G6
2: this B    A: G7
3: this C    B: G8
4: G1        C: G9
5: G2        D: G10
6: G3        E: G11
7: G4        F: G12

actions are performed on a "target"; the target defaults to the the object that's checking conditions
but can be changed. there's also an "other" object

target this object
target the other object
target the first found object of a given type for this
target the first found object of a given type for other

this object's variable = this object's variable
this object's variable +-*/= this object's variable
this object's variable = other object's variable
this object's variable +-*/= other object's variable
other object's variable = this object's variable
other object's variable +-*/= this object's variable

stop
bounce (in a random direction)
bounce (180 degrees)
destroy
shoot object [type] [in a direction/any direction/towards other object]
stop taking player input
start taking player input
play sound effect
user flag [0-7] [on/off]
horizontal flip [on/off]
vertical flip [on/off]
invisible on/off
go straight [in a direction/any direction/towards other object/towards X/Y] at [speed]
swap positions with other object
jump to position of other object
jump to X, Y
win
lose