super6502

bslathi19/super6502

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Commit Graph

Author	SHA1	Message	Date
Byron Lathi	1128b986eb	Fix state transitions with regard to clock The SD card expects data to transition on falling edges and be stable on rising edges. Additionally, writes from the CPU were not handled with correct timing. Now, there is an extra state when writing to the command register so that the command is properly latched before the CRC is calculated.	2022-04-10 17:52:07 -05:00
Byron Lathi	31a4656cac	Reduce sd_controller addr width from 4 to 3	2022-04-09 17:31:25 -05:00
Byron Lathi	f89ecfa038	Add SD Card controller for sending commands Adds the start of the SD card controller which is capable of sending commands using the SD protocol. It is accessed by writing the arguments first and triggered by writing the command number.	2022-04-08 12:28:17 -05:00

Author

SHA1

Message

Date

Byron Lathi

1128b986eb

Fix state transitions with regard to clock

The SD card expects data to transition on falling edges and be stable on
rising edges.

Additionally, writes from the CPU were not handled with correct timing.

Now, there is an extra state when writing to the command register so
that the command is properly latched before the CRC is calculated.

2022-04-10 17:52:07 -05:00

Byron Lathi

31a4656cac

Reduce sd_controller addr width from 4 to 3

2022-04-09 17:31:25 -05:00

Byron Lathi

f89ecfa038

Add SD Card controller for sending commands

Adds the start of the SD card controller which is capable of sending
commands using the SD protocol.

It is accessed by writing the arguments first and triggered by writing
the command number.

2022-04-08 12:28:17 -05:00

3 Commits