Warning!!!

Board with some issues, read the description of this product carefully before buying it.

General description

Based on Sergey Kiselev schematics from Micro8088, SVGA, etc...

The features are:

8088 and NEC V20 support

8087 co-processor support

4.77MHz, switchable to 9.55MHz with hotkey

2x64K ROM, switchable with DIP switch, writable

800K SRAM

640K conventional

up to 160K UMBs (128K max when using EGA/VGA)

Configured DOS 6.22 uses only 10K conventional!

Highly-compatible SVGA, up to 512K VRAM

HD Floppy controller, with FM support

Bootable CF Card Interface

Option 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 with DIP switches. Can disable onboard peripherals.

Issues

During board assembly, the RS232 transceiver was upside down, the board booted but obviously the serial port did not work. When desoldering it I had the bad fortune to cut at least two tracks in the process... view picture 3.

Consequence, it doesn't boot anymore. Two of the tracks (IO CHK and IOCHRDY) go directly to the Trident IC and nowhere else except the buses that are directly connected to the Faraday, the other is AEN, a more important signal than apart from the Trident It goes to other components ... taking advantage of the fact that these are Through Hole I make a bridge to correct it even if it is only this signal... view picture 4.

But the board still does not boot. One thing is clear, the SVGA and other expensive components such as the Faraday and other ICs in sockets work perfectly but it requires a more in-depth review.

Additional board

In the same price another new board without components is included, view pictures. If the other could not be operated, it can be used to begin the assembly process ... the most expensive components such as SVGA and Faraday (can be checked on eBay or Google) have been verified and can be used.

Other considerations

The official sale price by the author of this board amounts to $ 340, plus shipping, plus customs:

https://monotech.fwscart.com/NuXT_-MicroATX_Turbo_XT-_955MHz_832K_RAM_XT-CF_SVGA_Floppy_Serial/p6083514_19777986.aspx

Stock is expected in November 2019. In addition, this price is for the 256Kb version of VRAM at 70ns, I offer this board with 512Kb of VRAM at 60ns.