Changes

   bit2: reboot (used by mcu sysmodule and LgyBg)

   bit2: reboot (used by mcu sysmodule and LgyBg)

   bit3: used by LgyBg to power off, causes hangs in 3DS-mode

   bit3: used by LgyBg to power off, causes hangs in 3DS-mode

   bit4: an mcu::RTC command uses this, seems to do something with the watchdog

   bit4: used by PTM to signal that sleep mode is about to be entered

Bit 4 sets a bit at a RAM address which seems to control the watcdog timer state, then this bit is immediately unmasked. This field has a bitmask of 0x0F.  

Bit 4 sets a bit at a RAM address which seems to control the watcdog timer state, then this bit is immediately unmasked. This field has a bitmask of 0x0F.  

|-

|-

| ds

| ds

| rw

| rw

| Looping queue register

| Free register bank address select

Writing to first byte resets the queue position to the nth element

Selects the index to read from in the free register bank, up to 200 (?). Used with reg 0x61.

Reading from this register causes the values to shift up by `readsize-1`(needs confirmation) bytes after returning `readsize-1` bytes from the top of the stack (first byte is read-only, so is always zero)

 

Reading from this register seem to read N bytes from the bank while incrementing the internal index by the same amount.

 

Byte 0: bit0 = "WirelessDisabled", bit1 = "SoftwareClosed", bit2 = "PowerOffInitiated", bit3 = "LgyNativeResolution", bit4 = "LegacyJumpProhibited"

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|-

| 0x61

| 0x61

| ds(0x100)

| ds(0x100)

| rw

| rw

| Writing to this register pushes values on top of register 0x60's stack. Reading from this register doesn't advance the stack.

| Free register bank, data is read from/written to here.

The first byte is used to store flags for managing FIRM/NS state - bit0 = "WirelessDisabled", bit1 = "SoftwareClosed", bit2 = "PowerOffInitiated", bit4 = "LegacyJumpProhibited". This register survives a power-off, but it resides in RAM, so its contents get lost on battery pulls. This register doesn't seem to actually control MCU behaviour by itself, it just seems to be used for storing arbitrary data.

 

Writing to here seems to increment the internal index?

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|-

| 0x62 - 0x7E

| 0x62 - 0x7E