NuXT

NuXT Motherboard (v1.0)

The NuXT is an 8088 class motherboard built using a mixture of new and original components.

It is based on schematics by Sergey Kiselev and manufactured by Monotech PCs.

It allows native 8088 operation while supporting newer interfaces such as ATX, VGA & CF Card

Features

8088 and NEC V20 support
8087 co-processor support
4.77MHz, switchable to 9.55MHz with Ctrl-Alt-+
2x64K ROM, switchable with DIP switch, writable
800K SRAM
- 640K conventional
- up to 160K UMBs (128K max when using VGA)
- Configured DOS 6.22 uses only 10K conventional!
Highly-compatible TVGA9000i SVGA
HD Floppy controller, with FM support
Bootable CF Card Interface - 64MB CF Card Included! Loaded with DOS and ready to go.
ROM Socket, supporting 8K and 32K ROMs, writable
16C550 Serial Port
PS/2 Keyboard Port
ATX Power Input. Generates own -5V
4 x 8-bit ISA Slots
Front-panel connector for modern cases
Highly configurable via DIP switches. All onboard peripherals can be disabled

Changes from Version 1.0 include:

VGA disable fixed
Floppy disable fixed
Serial circuitry moved to improve reliability
Re-arranged board to allow 16-bit cards in 3 of the 4 slots instead of 1 of the 4

Changes from Version 1.1 include:

Black PCB
Memory address decoder SPLD replaced with discrete logic.
More documentation text on the back
Changed to 4-layer PCB to make routing easier.
moved RS232 transceiver next to the UART, and routed to the serial port all 9 wires including GND, alone as if it was a serial cable.