Mario Paint has a few unusual features:

• Mario Paint takes input from the SNES mouse instead of the usual controller.
• Mario Paint allows users to draw pixels into a 16-color buffer.
• If you wait at the title screen, Mario Paint provides a very long demonstration.

Subpages Edit

• /address map, obtain or contribute your ROM and RAM addresses.
• /random number generator
• /transmusical string, a string that contains data for the SPC-700.

Miscellaneous Edit

This is for stuff without a subpage.

Calling convention Edit

Calling convention is that a subroutine might alter the values of volatile registers, but must preserve the values of nonvolatile registers.

Here is a guess after studying a few jsl subroutines.

Frequently volatile:

• Accumulator A.

Sometimes volatile:

• Index registers X and Y. Some routines preserve them, some do not.

Rarely volatile:

• Data bank.
• Direct page location.
• Processor flags.

Some jsl subroutines require no specific values data bank, direct page location, or processor flags (except that decimal mode must be off). Instead, they accept any values, temporarily switch to different values and restore the previous values before returning.

SNES header Edit

Information from the SNES header of Mario Paint (JU):

mario-paint.sfc:
  SMC header: no
  SNES header: offset 0x7fc0, score: 7/9
  name: "MARIOPAINT           " (21 bytes)
  status: 0x20 (slow LoROM)
  cartridge type: 0x02 (ROM and save-RAM)
  ROM size: 0x0a (1 megabyte)
  RAM size: 0x05 (32 kilobytes)
  country: 0x00 (NTSC)
  licensee: 0x01 (Nintendo)
  version: 0x00
  complement/checksum: 0xb461/0x4b9e
  interrupt handlers (native mode):
    COP     BRK     ABORT   NMI     UNUSED  IRQ
    0x80ae  0x0000  0x0000  0x80d4  ------  0x80af
  interrupt handlers (emulation mode):
    COP     UNUSED  ABORT   NMI     RESET   IRQBRK
    0x0000  ------  0x0000  0x0000  0x8000  0x0000