XT-CF-Lite V4

Description

XT-CF-Lite V4 is a remake of James Pearce's XT-CF-Lite card, which in its turn is a simplified version of his CPLD based XT-CF card, and shares some ideas with XT-IDE card. This card allows connecting a Compact Flash (CF) card to computers with ISA bus and using it as a mass storage device. The card also supports BIOS extension ROM.

The main difference from the original XF-CF-Lite is using through hole components except of CF connector. Other differences are:

• • 8 KiB EEPROM (28C64) or 8 KiB EPROM (27C64) instead of a flash ROM.

  • Slightly different activity LED circuit (saves one IC).

Picture

DIP Switches Settings

SW1 - I/O Address Selection

SW1.4 - Not Used

SW2.1 - EEPROM Enable

SW2.2 - EEPROM Write Enable

SW2.3 - SW2.7 - EEPROM Address Selection

Notes

• Make sure that selected I/O and EEPROM addresses do not conflict with other devices

• Addresses 0xC0000 - 0xC6000 will conflict with EGA/VGA BIOS extension

• Addresses 0xC8000 - 0xCA000 might conflict with XT Hard Disk BIOS extension

• Addresses 0xE0000 and up might conflict with system BIOS on newer motherboards

  • It is recommended to disable EEPROM write once XT IDE BIOS extension is programmed and configured

SW2.8 - Not used

Bill of Materials (BOM)