MTX /SDX FDC ICs /?

About original Memotech hardware.
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lezanderson
Posts: 175
Joined: 14 Aug 2012 15:31

MTX /SDX FDC ICs /?

Post by lezanderson » 05 May 2016 13:25

Hi.


Are there any equivalent, Direct replacement ICs for the SDX FDCs

MB8877A DIP40
WD9216 DIP8

Are any of these pin/hardware compatible WD1772/WD1770/uPD765 etc ?

If so give my a list of direct replacement FDC ICs and I'll keep a lookout for them on my travels !

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Dave
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Joined: 11 Aug 2012 18:16
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Re: MTX /SDX FDC ICs /?

Post by Dave » 05 May 2016 23:24

Hi Lez,

FDX Used a 1791
The original SDX Used the MB8877A
The "new" SDX Used a 1793

The MB8877A is compatible with the 1791-02 and 1793-02, so should do all Memotech disk controllers

The earlier controllers user the FD9216 data separator

The "new" SDX used UM8326B which should be compatible with all controllers

regards
Dave

lezanderson
Posts: 175
Joined: 14 Aug 2012 15:31

Re: MTX /SDX FDC ICs /?

Post by lezanderson » 06 May 2016 10:54

Information only

got prices for some FDCs

WD1770 DIP $10.0/ea
WD1772 DIP $10.0/ea
Z0765/D765 uPD765 DIP $2.0/ea
SED9420 DIP $1.65/ea
FD1797 DIP $7.5/EA NEW
MB8877 DIP $2.35/EA NEW
WD9216 DIP $2.35/EA



The MB8877 & WD9216 come to $4.70 about £3.25 the two

* The uPD765 + SED9420 (Amatrad,Spectrum) FDCs are cheap too ($3.65, £2.55) !

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