Atari Early model with external floppy disk drive and PSU from 1985 520 ST computer DMA 40 pin DIP controller chip 

P/N: C025913-20         

NEW Genuine old stock

*** ONLY to be used with early 520 ST model ***

*** NOT for 520 / 1040 STF / STFM / Mega or STE ***

Any questions - please ask

I combine shipping on all items