• CPU: Intel 8086 8 MHz
• RAM: 640 KB
• VRAM: 64 KB
• ROM: Unknown
• Text Modes: 40 x 25 / 80 x 25
• Graphic Modes: All EGA graphic modes (maximum : 640 x 350), Hercules mode for monochrome versions (maximum 720 by 350)
• Colors: 16 among 64
• Sound: Beeper
• I/O Ports: Four 8-bit ISA slots (one being reserved of the internal HD controller), Centronics, RS232c, Mouse port (proprietary)
• Built In Media: one or two 5.25” disk-drives, 20 or 30 MB HDD
• OS: MS DOS 3.2
• Peripherals: Most of the standard IBM/PC cards

Basically the same as PC 1512. Paradise EGA emulation incomplete, will profit from generic EGA/VGA improvements.

IBM XT compatible with modified EGA monitor. Sold as Schneider PC 1640 in Germany. Sold as Amstrad PC 6400 in USA

The Amstrad PC 1640 was the successor to the Amstrad PC 1512. It had the same characteristics as its predecessor except for added memory (640 KB instead of 512 KB) and the EGA graphics standard. It also had great success, but to a lesser extent than the PC 1512. The PC-1640 was marketed under the name PC-6400 in the USA. It was also sold in Germany and maybe some other European countries under the name Schneider.

(info from old-computers.com)

• PC 1640 at old-computers.com