Backup RAM: Difference between revisions
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Line 16: | Line 16: | ||
|$D00000 | |$D00000 | ||
|$D0000F | |$D0000F | ||
| | |16 | ||
|$00 | |$00 | ||
|Unused, fill with $00 | |Unused, fill with $00 | ||
Line 22: | Line 22: | ||
|$D00010 | |$D00010 | ||
|$D0001F | |$D0001F | ||
| | |16 | ||
|"BACKUP RAM OK!Ç" | |"BACKUP RAM OK!Ç" | ||
|The routine at $C125C8 will check if this string is present, if not it will test the ram (using the test_ram routine at $C13134) and re-init the backupram | |The routine at $C125C8 will check if this string is present, if not it will test the ram (using the test_ram routine at $C13134) and re-init the backupram |
Revision as of 19:29, 8 October 2011
The backup RAM is a battery-powered 64KiB RAM space used by MVS systems to store game scores, cab infos and income logs. Access is handled by the BIOSes.
Memory region: $D00000~$D0FFFF (Mirrored up to $DFFFFF ?).
Data structure
All offset are taken from the sp-s2.bin bios.
Start | End | Size | Data | Description |
$D00000 | $D0000F | 16 | $00 | Unused, fill with $00 |
$D00010 | $D0001F | 16 | "BACKUP RAM OK!Ç" | The routine at $C125C8 will check if this string is present, if not it will test the ram (using the test_ram routine at $C13134) and re-init the backupram |
$D00020 | $D00021 | 2 | Coin deposit related (rising edge finding ?) | |
$D00034 | $D00035 | 2 | $00 | "Internal" credit counters for player 1 and player 2 (BCD), used by BIOS only. |
$D0003A | $D00045 | 12 | Cab settings.
| |
$D00046 | $D00046 | 1 | SOUND_STOP | No sound at all if non-zero |
$D00047 | $D00047 | 1 | SLOT NUMBER | Number of detected slots (2 for slot1) |
$D00048 | $D00059 | ? | ||
$D0005A | $D0005D | 4 | HHMMSSMM | Current time, hour is mult by 4 (???), MM is the milliseconds. |
$D0005E | $D00103 | ? | ||
$D00104 | $D00107 | 4 | YYMMDDdd | Current date |
$D00108 | $D00109 | ? | ||
$D0010A | $D0010D | 4 | Detailed game start book address | |
$D0010E | $D00111 | 4 | Total game start book address | |
$D00112 | $D00115 | 4 | Detailed cabinet coin book address (sub 0x240 for the start book one) | |
$D00116 | $D00119 | 4 | Current month cabinet coin book address (sub 0xC for the start book one) | |
$D0011A | $D00121 | ? | ||
$D00122 | $D00123 | 2 | $23 | The init_backupram routine write $23 there, purpose unknown. |
$D00124 | $D00127 | 4 | Slot-1 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00128 | $D0012B | 4 | Slot-2 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID.
On a slot1 always unset (slot1 are slot2 with the second one empty) |
$D0012C | $D0012F | 4 | Slot-3 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00130 | $D00133 | 4 | Slot-4 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00134 | $D00137 | 4 | Slot-5 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00138 | $D0013B | 4 | Slot-6 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D0013C | $D0013F | 4 | Slot-7 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00140 | $D00143 | 4 | Slot-8 NGH number and game name ID (see below) | If not present $0000 as NGH and $FFFF as game name ID |
$D00144 | $D00147 | 4 | YYMMDDdd | Slot-1 book creation time YEAR-MONTH-DAY-day number |
$D00148 | $D0014B | 4 | YYMMDDdd | Slot-2 book creation time YEAR-MONTH-DAY-day number |
$D0014C | $D0014F | $4 | YYMMDDdd | Slot-3 book creation time YEAR-MONTH-DAY-day number |
$D00150 | $D00153 | 4 | YYMMDDdd | Slot-4 book creation time YEAR-MONTH-DAY-day number |
$D00154 | $D00157 | 4 | YYMMDDdd | Slot-5 book creation time YEAR-MONTH-DAY-day number |
$D00158 | $D0015B | 4 | YYMMDDdd | Slot-6 book creation time YEAR-MONTH-DAY-day number |
$D0015C | $D0015F | 4 | YYMMDDdd | Slot-7 book creation time YEAR-MONTH-DAY-day number |
$D00160 | $D00163 | 4 | YYMMDDdd | Slot-8 book creation time YEAR-MONTH-DAY-day number |
$D001A4 | $D002A7 | 4 | Current month game start book | |
$D001A8 | $D002AB | 4 | ? | |
$D002A0 | $D002AF | 15 | Game Name 0 | |
$D002B0 | $D002BF | 15 | Game Name 1 | |
$D002C0 | $D002CF | 15 | Game Name 2 | |
$D002D0 | $D002DF | 15 | Game Name 3 | |
$D002E0 | $D002EF | 15 | Game Name 4 | |
$D002F0 | $D002FF | 15 | Game Name 5 | |
$D00300 | $D0030F | 15 | Game Name 6 | |
$D00310 | $D0031F | 15 | Game Name 7 | |
$D00320 | $D0131F | $1000 | Game 1 data | |
$D01320 | $D0231F | $1000 | Game 2 data | |
$D02320 | $D0331F | $1000 | Game 3 data | |
$D03320 | $D0431F | $1000 | Game 4 data | |
$D04320 | $D0531F | $1000 | Game 5 data | |
$D05320 | $D0631F | $1000 | Game 6 data | |
$D06320 | $D0731F | $1000 | Game 7 data | |
$D07320 | $D0831F | $1000 | Game 8 data |