ISA Expansion Board for Amstrad PPC 512/640
Assembly Notes:
Cables are straight connected Amstrad B20 is internal regulator Disable: If you are powering this from the Amstrad, please leave B20, (Port B Pin 2) disconnected.
Required:
10uF Tant C1 C2 C3 C4 C5 C6 C11 C7 C8 C9 C10 C12 C13
10K 9 Resistor Array SIP x 1 (RR1)
8-bit ISA-PC bus connector x 3
74HCT244 U1 U2
3mm LED D1
2 (2x20) 40pin IDC
37Pin IDC Plug
25pin IDC Plug
40W Flat Ribbon Cable (IDE Cable)
Optional: Beat Detect (A7)
470R 1/4W R3 R4 R5
3mm LED D3
2x20 double row x 2
7905 IC_TO220-3_Vert U3
74HCT74 U4