Rear view, oblique and top view of the jumper. See this photo and this photo for a successful installation. Also, pins P11/P12 (used for connection to the Cloudy) might need to be shortened so they don't collide with the keyboard connector. Important note 2: Only applies to STf/STfm with C070523-001 motherboard (with the CPU next to the floppy drive)! With these motherboards, the Lightning ST can only be installed when your computer is equipped with a slim floppy drive model. If that happens, an intermediate socket or cautious bending of the pins before insertion can be a remedy. They can becom loose and cause contact problems. Important note 1: Please use the connectors (64pin) carefully, as they are not designed for multiple connections and disconnections. The Lightning ST lives up to its reputation! Lightning ST: 430 kb/s (an installed and activated blitter increases the USB transfer rate by about 20%).Here you have a small impression how fast the USB transfer of the Lightning ST is with an 8MHz Atari ST compared to other USB solutions: With this three operate modi fully compatibility to other pcbs warranted. The IDE interface also could be disabled by not setting any jumper (J1 and J2 open). last but not least a smart swap modus (recommed mode for best speed and compatibility).byteswap modus with twisted cable (solution like ppera it use).The IDE interface offer three operate modi: The USB-Ports based on a ISP1160 chip from NXP. The main IC on the pcb is a XC95144XL from Xilinx. an adressdecoder for TOS2.06 (he圎00000) (further instructions see below).The Lightning ST is a pcb with various items for all ATARI ST models.
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