Short Summary: This is an IBM PC Compatible. (1980’s early 90’s). Computer you can build yourself using this kit. It plugs into a backplane which I also sell as a kit. Build Time: 5-8 hours. Skills: Basic soldering skills (Fully Assembled option also available). Specs: Intel 8088 or compatible processor. Operating System: DOS 6.22 or earlier. Maximum disk size / partition in DOS 6.22. Please take your time and review this description carefully to determine if this product is for you. I do offer a fully assembled version of this product. If it does not appear in drop. Please send me a message. This parts kit is for the IBM/PC compatible Xi8088 main board, by (Sergey Kiselev) check out his project at the URL below. This processor board along with the ISA-Backplane kit which I sell separately is used to build a fully functioning IBM pc clone. Parts are known to work together in a fully assembled board. I also sell individual chips as well see my other listings. This is an Xi 8088 which is an IBM PC/XT compatible processor board in ISA board form factor. It offers several enhancements over the standard IBM PC/XT, such as support of PS/2 keyboard and mouse and built-in real time clock with NVRAM (also known as CMOS setup memory). This is a hobby grade computer the BIOS is under active development the performance and stability of this system may vary. I have tested this computer kit with the XT-IDE and floppy controller. It installs and boots MS-DOS 6.22 and tested it with CheckIt software (see screenshots). As time goes on I will perform further testing with additional applications and update the list on my wiki site. Please check back often. If things don’t go according to. Bad solder job or bad damaged chips? 20% discount on the board completion and repair service for complete kit or Integrated circuit sales. Please see my other listing. Processor: Intel 8088 or compatible, or NEC V20. Math co-processor optional select from drop down. Supports both standard 4.77MHz CPU clock and turbo, up to 13.33MHz CPU clock operation. RAM: Up to 832 KiB of usable system memory (640 KiB base memory, and up to 192 KiB UMB); Implemented using SRAM. ROM: 128 KiB flash ROM. Configurable to either 64 KiB or 128 KiB. 8-bit ISA interface with several ISA/AT signals. PS/2 compatible keyboard and mouse controller. One 8237 direct memory access controller (DMAC). Two 8259 programmable interrupt controllers (PICs), supporting the total of 15 interrupts; 10 interrupts available for extension cards. One 8254 programmable interval timer (PIT). One DS12885 real time clock and non-volatile RAM (RTC/NVRAM). Please note: If you are purchasing only the. Bare PCB, additional components will be required to finish the product. The full parts list is available from the designer’s website below and this board has plenty of coverage on YouTube showing step by step assembly instructions. Additional support also available on my wiki site wiki. Assembly service available please msg me if drop down item is grayed out. Not really required as all the component placement is printed right on the PCB. It’s as simple as placing the components on the board and soldering them. All the IC chips are in sockets so no worries about making mistakes. Guide for DIP switches is available at the original designer’s site also on my wiki. This listing is for the following parts. Complete Kit & Integrated Circuit. 1 Includes all parts seen below. High Speed (AHCT, ALS series) chips are used wherever possible allowing for faster clock speeds. These parts have been tested and known to work together. They also have been benchmarked. See test result images. If you don’t have a EEPROM writer, no worries the kit comes with the BIOS already written to the EEPROM chip. 1 PCB Processor main board that fits. 0.1 uF ceramic, 5.08 mm lead spacing. 10 uF ceramic, 5.08 mm lead spacing. 33 pF ceramic, 5.08 mm lead spacing (not needed in this design use 510 R resistors in the crystal circuit). 5-30 pF trimmer capacitor. 47 pF ceramic, 5.08 mm lead spacing. 0.01 uF ceramic, 5.08 mm lead spacing. 100 kOhm, 1/4 W. 470 Ohm, 1/4 W. 10 kOhm, 1/4 W. 1 kOhm, 1/4 W. 33 Ohm, 1/4 W. 510 Ohm, 1/4 W (for crystal circuit). 10 kOhm, 10 pin, bussed resistor array. 10 kOhm, 6 pin, bussed resistor array. 470 Ohm, 6 pin, bussed resistor array. (I sell these chips individually as well see my other listings). I8088 or NEC V20. 8284 or 82C84 clock generator. 8288 or 82C88 bus controller. 8259 or 82C59 PIC. 8237 or 82C37 DMAC. 8254 or 82C54 PIT. 8242, 82C42, VT82C42N, HT6542B. 512 KiB SRAM, 32 pin DIP – AS6C4008-55PCN. 128 KiB flash, 32 pin DIP – 39SF010, 29F010, 29C010. 74ALS11, 74AHCT11, or 74ACT11. 74ALS175, 74AHCT175, or 74ACT175. 1 DS12885 Realtime Clock. 40 pin 600 mil DIP socket. 32 pin 600 mil DIP socket. 28 pin 600 mil DIP socket. 24 pin 600 mil DIP socket. 20 pin 300 mil DIP socket. 18 pin 300 mil DIP socket. 16 pin 300 mil DIP socket. 14 pin 300 mil DIP socket. CR2032 batter holder, 20 mm lead spacing. 4 pin 300 mil DIP full can oscillator socket. Turbo clock oscillator 24 MHz. 13×1 pin header (11×1 + 2×1). 6 pin Mini-DIN connector (Purple) PS2 keyboard. 6 pin Mini-DIN connector (Green) PS2 mouse. 6 mm tactile switch, right angle. 8 positions DIP switch. 4 positions DIP switch. 1.1A polyfuse, 5.04 mm lead spacing. 14.31818 MHz crystal. 32768 Hz tune crystal. Bracket and Screws + Extras. Customized Keystone 9205 Bracket (CNC milled no drilling required). Screw 4-40 diameter, 1/4 length. 1 CR2032 CMOS Battery. Chips are mix of new, new/old stock and renewed/. Refurbished, some chips may show their age. You will need an 8-bit compatible video card as well as a floppy/ide/serial controller card. In rare cases bad chips do make it into the kits. It’s not economically feasible to test every logic chip. If this happens to domestic customers sending replacements is relatively cheap. Don’t forget to open an account and share your experience with the build! I also sell the ISA backplane and floppy controller kits compatible with this processor board. This computer kit is based on an. The majority of the cost of the kit is the integrated chips. Downloadable firmware/BIOS available at the designer’s website. The item “Xi 8088 IBM PC/XT Compatible Processor Board Home Made Computer Kit” is in sale since Saturday, November 27, 2021. This item is in the category “Business & Industrial\Electrical Equipment & Supplies\Other Electrical Equipment & Supplies”. The seller is “numberf55″ and is located in Bethpage, New York. This item can be shipped to United States, Germany, Japan, Canada, United Kingdom, France, Australia.

• Model: XI
• Country/Region of Manufacture: Unknown
• Type: Circuit Board
• Brand: PCB