Zenith Z-171, Circuit Diagrams

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Page 4: ...l f 1 I 1 IN 0 lP r J q i W I el llI i 0 f I IJ I U j q I _ J I I I iI1l E f TIlp I I 11 rl l i H H I 1 0 3 J Jj I i 1 t 4 I WS L P II I 1 t7 o I 1 2D 1 l n07 t f o Figure A 3 DMA Ready and Interrupt...

Page 5: ...I i n D Figure A 4 SRAM ROM and SIO...

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Page 9: ..._ e qM n D D II c M t tl 0 ID D I Ml 0 J C lID _ __ It t 00 i9 r I r t OO lH t 7K ijj t J J t FH j 1 E J7 0 D IT k __ CLIU C It P o CI 2 I h HIJ tY Q7 1 M Figure A 8 Floppy Disk Interface...

Page 10: ...ffi I I I h I 0 OJ n II c Co I I 1 fltl ll L tt tt 17C l1 _A _fi E 10 r j O f 0 f 10H j f L_ C l Q fL c I _I J f JS Figure A 9 Printer Parallel Port and Timer...

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Page 17: ...1 i r _ 1 l VI 4 4 I llU It t 1 n l n 1m n n I r I FIgure A I6 Video Board Part I...

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