Difference between revisions of "CARD"

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(CARD_ERROR ($C0046E))
(Variables)
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|BIOS or Game
 
|BIOS or Game
 
|Game Subnumber
 
|Game Subnumber
 +
|}
 +
 +
The following temporary variable are used when calling CARD :
 +
 +
{| class="regdef"
 +
| '''Address'''
 +
| '''DEF name'''
 +
| '''Size'''
 +
| '''Description'''
 +
|-
 +
|$10FD04
 +
|BIOS_CARD_DIRECTORY_START
 +
|long word
 +
|Start of Directory
 +
|-
 +
|$10FD08
 +
|BIOS_CARD_BLOCK_NUMBER
 +
|word
 +
|Number of blocks
 +
|-
 +
|$10FD0A
 +
|BIOS_CARD_FAT_START
 +
|long word
 +
|Start of FAT
 +
|-
 +
|$10FD0E
 +
|BIOS_CARD_FAT_SIZE
 +
|word
 +
|Size of FAT
 +
|-
 +
|$10FD10
 +
|BIOS_CARD_DATA_START
 +
|long word
 +
|Start of Data
 +
|-
 +
|$10FD14
 +
|BIOS_CARD_TYPE
 +
|word
 +
|$0 : 8 bits wide card
 +
 +
$01 : 16 bits wide card
 +
 +
$80 : 16 bits wide weird card (more to come on them)
 
|}
 
|}
  

Revision as of 03:44, 21 October 2012

CARD ($C00468)

The CARD routine is used to perform action on the memory card.

Warning: register contents aren't preserved !

Variables

The following variables are used when using the CARD routine :

Address DEF name Size Set by Description
$10FDC4 BIOS_CARD_COMMAND byte BIOS or Game Command to execute,
$10FDC6 BIOS_CARD_ANSWER byte BIOS Answer code for the command
$10FDC8 BIOS_CARD_START longword BIOS or Game Pointer to data
$10FDCC BIOS_CARD_SIZE word BIOS or Game Size of data
$10FDCE BIOS_CARD_FCB word BIOS or Game Game NGH number
$10FDD0 BIOS_CARD_SUB byte or word BIOS or Game Game Subnumber

The following temporary variable are used when calling CARD :

Address DEF name Size Description
$10FD04 BIOS_CARD_DIRECTORY_START long word Start of Directory
$10FD08 BIOS_CARD_BLOCK_NUMBER word Number of blocks
$10FD0A BIOS_CARD_FAT_START long word Start of FAT
$10FD0E BIOS_CARD_FAT_SIZE word Size of FAT
$10FD10 BIOS_CARD_DATA_START long word Start of Data
$10FD14 BIOS_CARD_TYPE word $0 : 8 bits wide card

$01 : 16 bits wide card

$80 : 16 bits wide weird card (more to come on them)

BIOS_CARD_ANSWER

This variable contain the result of the operation.

$00: Normal completion

$80: No card inserted

$81: Card isn't formated

$82: Data doesn't exist

$83: FAT error

$84: Memory card is full

$85: Write disable or ROM card

Commands

$0 - Format memory card

Format the memory card.

$1 - Data Search

Find the number of save files for the specified game.

Inputs :

BIOS_CARD_FCB must contain the NGH number of the game to search.

Outputs :

BIOS_CARD_SUB contain a 16 bits mask for all 16 available blocks for the game. If bit n is set to 1, then the n save exist for this game.

$2 - Data load

Load the specified save file in RAM.

Inputs:

BIOS_CARD_FCB must contain the game NGH number.

BIOS_CARD_SUB must contain the game save number (16 max per game).

BIOS_CARD_START must contain an address where the save will be loaded.

BIOS_CARD_SIZE must contain the size of the save (normally 64 bytes).

$3 - Data save

Save from RAM to the specified save file.

Inputs:

BIOS_CARD_FCB must contain the game NGH number.

BIOS_CARD_SUB must contain the game save number (16 max per game).

BIOS_CARD_START must contain an address from where the save will be saved.

BIOS_CARD_SIZE must contain the size of the save (normally 64 bytes).

$4 - Data delete

Delete the specified file.

Inputs:

BIOS_CARD_FCB must contain the game NGH number.

BIOS_CARD_SUB must contain the game save number (16 max per game).

$5 - Read Data title

Read the Data Title of the BIOS_CARD_SIZE save file.

Inputs:

BIOS_CARD_START must contain an address to put the Data Title

BIOS_CARD_SIZE contain the save file to read from.

$6 - User name save

Set the user name of the memory card.

Inputs:

BIOS_CARD_START address to the username (max 16 bytes).

$7 - User name load

Load the user name of the memory card.

Inputs:

BIOS_CARD_START address where to put the data.

CARD_ERROR ($C0046E)

The CARD_ERROR routine can handle automatically some errors depending on the command and the error code.

Most of the time it will display a message on screen (using MESS_OUT) but the routine can also automatically format the memory card if it's needed. (On AES, a user confirmation is asked before formating, on MVS it is done automatically).

List of command/error combination that CARD_ERROR handle (based on the sp-s2 bios) :

Command Error Result
$2 (Data load) $81 (card not formated) Display "NO DATA FOR THIS GAME."
$2 (Data load) $83 (FAT error) Display "ERROR ON MEMORY CARD."
$2 (Data load) $85 (Write disable) Display "NO DATA FOR THIS GAME."
$3 (Data save) $81 (card not formated) Format the card
$3 (Data save) $83 (FAT error) Format the card
$3 (Data save) $84 (Card is full) Bring up a menu to delete some saves
$3 (Data save) $85 (Write protected) Display "MEMORY CARD WRITE PROTECTED."
$4 (Data delete) $85 (Write protected) Display "MEMORY CARD WRITE PROTECTED."
$6 (Username save) $81 (card nor formated) Format the card
$6 (Username save) $85 (Write protected) Display "MEMORY CARD WRITE PROTECTED."
$7 (Username load) $81 (card nor formated) Display "NO DATA FOR THIS GAME."
$7 (Username load) $85 (Write protected) Display "NO DATA FOR THIS GAME."