Labels:and circuit | crt screen | earth | flower | module | monitor | plant | road | sidewalk | sky | stairs | windowpane OCR: Designed Essential Data Duplicator Board Charles Revision Rosenberg 8-20-86 VccO 13 74LS VccO 74LS 90 90 VccO >Gnc VOcO >Gno Gnd Gnd OVcc VccO OVcc 74LS VccO 3 74LS VccO 90 VccO >pud Gnd Serial In put from Floppy Drive 1 Pin (See notes below) 3.9K HD>pu5 OVcc [3 74LS 74LS Gna 4 125 164 OVco 470 470 Gnd Gnd S OVcc 20 OVcc [2 74LS 4 139 74LS 373 +5Vcc 7 8 9 CLK 7MHz SEL DEV AO RM OUTIN INT OUT DMA IN +0 Gor D>pus DO D1 D2 D3 D5 D6 D7 Notes: 50=Pin Card Edge connector Apple [Buss Use 0. 1mf Decoupling Capacitors across all lIC pins Vcc to Gnd (Decoupling Caps are not shown on this Diagram) Vcc Gnd Pin 16 from Floppy Drive can be found un the Floppy Drive card top connector prd pin in from 74L S90 the rear the computer (back side of the board) the pin that sits closest to the printed circuit b ...
