The Amiga’s serial, parallel and mouse ports are used as if they were the PC’s equivalent ports. The internal disk drive of the Amiga becomes a 720K PC disk drive and any external 3.5 or 5.25 inch floppy disk drives are configured as their PC equivalents. An onboard utility allows you to use as much memory as is available on the Amiga and memory above the normal 1Mb limit can be accessed quite comfortably as extended memory in PC mode. To install the AT Once you have to take your Amiga apart and invalidate any remaining warranty, but the instruction book supplied by Vortex makes this a simple enough task that will take an averagely dextrous and intelligent person less than half an hour. As with most PC emulators, the display lets the AT Once down a shade. Four colours from a machine that is usually capable of 4092 more is a disappointment. From a choice of CGA, Toshiba, Olivetti and Hercules displays, CGA is currently the most usable. Better resolution than CGA is possible, but at the expense of taking the Amiga into the flickering interlace mode. Expansion cards should make it possible to use EGA and VGA display, but this may take its toll in processing speed. Silica claims that the availability of card slots will soon mean that an Amiga will run as a VGA PC for under £300.
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