Retroactive 64drive User Manual

Hardware Specification Page 1 / 11Overview The N64 only has access to the cartridge slot (known as the PI bus). In order to allow the bootloader

Hardware Specification Page 10 / 11USB Interface The USB interface is used for communication to a program running on the PC. Since the USB impl

Hardware Specification Page 11 / 11Revision Information Copyright Information © 2010-2011 Marshall H / Retroactive http://64drive.retroactive.b

Hardware Specification Page 2 / 11 To perform a command: 1. Check the status register to make sure CI is not busy 2. Write all necessary para

Hardware Specification Page 3 / 11CI Commands Command ID Parameters READ SECTOR INTO BUFFER 0x01 LBA READ SECTOR TO SDRAM 0x02 LBA, RA

Hardware Specification Page 4 / 11Command Listing Copies one sector into the on-chip 512byte buffer. Copies 512 bytes from CompactFlash to an

Hardware Specification Page 5 / 11 Writes a maximum of 512 bytes from the buffer to the USB chip FIFO. If you wish to send more than 512 bytes,

Hardware Specification Page 6 / 11Causes all words transferred directly from CF to SDRAM to be byteswapped, for loading V64 format images. This

Hardware Specification Page 7 / 11This is a 1024-byte (256 dword) buffer that stores a list of LBAs occupied by the image’s save file. The LBAs

Hardware Specification Page 8 / 11 Implementation Notes Polling the FPGA Status It is important to check the status of the FPGA state machine b

Hardware Specification Page 9 / 11 // DANGER WILL ROBINSON // The R4300’s data cache is about to be invalidated by the DMA. // Write back t