EverDrive-64 v3

The EverDrive-64 v3 is a flash cart made by Krikzz.

Basic information

ROM: Max 64MiB

RTC: supported

Save: 4k/16k bit EEPROM, 32KiB/128KiB SRAM, 128KiB Flash

USB Serial: 512-bytes block read-write

All registers must be accessed by 32bit word, but it seems only lower 16bits are valid.

High 16bits of all registers seems REG_STATUS on read.

Base PI address for registers is 0x08040000 (Cartridge Domain 2, SRAM area +0x40000)

You should access these registers from CPU through no-cached segment, i.e. +0xA0000000, ex. 0xA8040020 for REG_KEY.

PI address	name	R/W	description
0x08040000	REG_CFG	R/W	ED64 general configurations
0x08040004	REG_STATUS	R	ED64 registers, SPI, DMA statuses
0x08040008	REG_DMA_LEN	W	SD/USB DMA length in 512bytes blocks - 1 (ex. 0 = 0x200 bytes)
0x0804000C	REG_DMA_ADDR	W	SD/USB Cart address in 2048bytes blocks (ex. 1 = 0x00000800)
0x08040010	REG_MSG	?	?
0x08040014	REG_DMA_CFG	W	Invoke SD/USB DMA
0x08040018	REG_SPI	R/W	SPI DAT/CMD (write invoke CLK)
0x0804001C	REG_SPI_CFG	W	SPI configurations
0x08040020	REG_KEY	W	Enable or disable ED64 registers
0x08040024	REG_SAV_CFG	W	Save configurations (EEPROM/SRAM/FLASH)
0x08040028	REG_SEC	?	?
0x0804002C	REG_VER	R	Hardware version
0x08040030	?	R/W	I2C to access RTC
0x08040034	?	?	?
0x08040038	?	?	?
0x0804003C	?	?	?
0x08040040	REG_CNT	?	FPGA?
0x08040044	REG_DAT	?	FPGA?
0x08040048	MAX_MSG	R/W	Some configurations
0x0804004C	REG_CRC	?	?
0x08040050	?	?	Flash?
0x08040054	?	?	Flash?

R/W

bit from lsb	description
15	1=start FPGA configuration??
9-8	D64 specific??
6-5	I2C/RTC??
3	WR_ADDR_MASK??
2	WR_MOD??
1	1=16bit swap on SD DMA read
0	1=enable SDRAM on cart (usually set to 1)

...other regs TBA

TBA