Retro & Vintage Computers and Appliances
Building an XTIDE ISA IDE Card for use with a Compact Flash Adaptor
Componenet ListNote there may be ommissions or other issues with this list as it's been edited from the official bill of materials. Please check against the schematic, PCB and original.
Ref(s) Value ----------------- U9 AT28C256 U1, U2 74F573 U3, U11 74LS245 U4, U6 74LS04 U5 74LS32 U7 74LS138 U8, U10 74LS688 SW1, SW2 8 way DIP switch RP1, RP2 10K x 9 SIP resistor packs R1, R2 470R 1/4 Watt 5% resistor R3, R4 10K 1/4 Watt 5% resistor D1 LED (whatever colour you prefer) J3, J4 2x1 header J5 5x2 header J1, J2 3x1 header C1-C11 0.1 uF 50V axial capacitors C12 100 uF 6.3V capacitors 1x 28 pin wide IC socket for EEPROM 6x 20 pin DIL IC socket 3x 14 pin DIL IC socket 1x 16 pin DIL IC socket J1-J5 Order a 20 pin (or greater) breakaway header and break into the required lengths. Jumper shunts 0.1" jumper links, 2 or 3 required 20x2 pin right angle connector (for IDE interface) Bracket Keystone 9202 ISA bracket Screws 4-40 x 1/4" machine screw for bracket Note: Interrupt features are not currently used so no IRQ jumpers are needed for these at present. Substitutions: All 7400 series logic ICs can be substituted for LS, ALS, ACT, or HCT equivalents. RP1, RP2, R3, and R4 are pull-up/pull-down resistors, their values are noncritical. Anything from 2.2K - 47K should be fine. R1, R2 tolerance is not critical, but using a substantially different value will alter LED brightness. Do not use less than 220R. C1 - C11 are power supply bypass, 0.01 - 0.1 uF axial or radial ceramic capacitors are fine. C11 is for power supply decoupling, any value from 47 uF up is fine, aluminum electrolytic or tantalum. SW1, SW2 are just 8 position DIP switches, use whatever is cheap/convenient. D1 is just an indicator, use whatever you'd like