SD interface

[fan]

Exist any easy schematic for connect SD card to ZX ?
No CPLD, no FPGA, only classic schematic.

Orionsoft made software SPI on AY chip - http://zx.pk.ru/showthread.php?t=4221 .

P.S. On MSX was an attempt to make SPI ports AY, source code attached. (Ports AY on MSX is used to connect joysticks).