SummerCart64/fw/rtl/external/README.md

External code for SummerCart64 Firmware

This folder contains code downloaded directly from external repositories with minor modifications.

qflexpress.v

Source

https://github.com/ZipCPU/qspiflash/blob/master/rtl/qflexpress.v

Documentation

There's comprehensive documentation for this module:

Modifications

• Changed initialization sequence.
• Extended address space for 16-bit address alignment.

wbsdram.v

Source

https://github.com/ZipCPU/arrowzip/blob/master/rtl/arrowzip/wbsdram.v

Modifications

• Changed refresh interval that suits 90 MHz clock and used SDRAM chip.
• Changed column and row address widths.