Opening up the 520ST
by JACK POWELL, Antic Technical Editor
You're looking at the back and the interior of Antic's $5,500 development model Atari 520ST. The machine you get off the shelves may look a little different, but the basic architecture will remain the same.
The $5,500, by the way, was not just for the hand-assembled computer. It also bought Antic two 3.5" disk drives, one 10-megabyte hard disk, a medium-resolution (640 x 200) RGB analog monitor, a high resolution (640 x 400) monochrome monitor, and one mouse. (Actually, we're still holding IOU's for the hard disk and the high-res monitor.)
The software in the package is the C language compiler, machine language assembler and debugger by Digital Research, the Mince screen editor by Mark of the Unicorn, Kermit a modem protocol program for file transfer, GEMDOS, and, of course the GEM operating environment both of which are in ROM in our machine.
With all of this came 1,000 pages of highly technical documentation.
THE PORTSJoystick Ports The two joystick ports look identical to current Atari joystick ports, except they are also used for the mouse.
Cartridge Slot This will accept a 40-pin board 20 upper and 20 lower.
Reset A small, square warm-start button.
Power Identical to previous Atari power switches.
Power In 7-pin, male DIN.
MIDI Out 5-pin, female DIN.
MIDI IN Same as above.
Television RCA, female. RF modulator is built in.
Channel Mini-switch, same as channel switch on the 8-bit Ataris.
Monitor 13-pin, female DIN.
Printer Female D-25, IBM-PC/Centronics compatible interface built-in.
Modem Male D-25, IBM compatible. Interface built-in.
Floppy Disk 14-pin, female DIN.
Hard Disk Female D-19.
Photography by Linda Tapscott