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Author Topic: 3.5" (and 5.25") floppy disc drives with a fully working Ready signal...  (Read 3758 times)

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Offline blumfeld

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I just bought a lot of Sony-MPF920-Z-131 drives which work fine as A: drive substitute and as external B: drive but I cannot tell anything about the ready signal. It's just a recommandable good and silent working drive.
« Last Edit: 15:10, 22 June 16 by blumfeld »

Offline Bryce

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You must have some sort of bridge or mod done for it to work though?

Bryce.

Offline blumfeld

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For my Schneider CPC 6128 I used the "Floppy CPC - 26 -> 34 Pin - Gotek HxC" cable for the internal drive and the "Amstrad CPC / Spectrum +3 Kit: 3.5" Floppy Disk Drive with Ribbon + Power" cable for the external drive B:. Both of them can be found at ebay. Addionally the internal drive needs to be bridged between Pins 33 and 34 to get ready.

Offline Bryce

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That's what I thought. However, permanently bridging the Ready signal won't work for all software. Certain disk utilities will refuse to work. With "fully working Ready signal" TFM meant a ready signal that only goes low when the drive really is ready.

Bryce.

Offline khaz

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Yep it's a shame that the Sony MPF920 need a complex mod to work properly, as they are of very good quality. Great build, low noise, they're my favourites amongst the few I have tried.

Offline TFM

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That's what I thought. However, permanently bridging the Ready signal won't work for all software. Certain disk utilities will refuse to work. With "fully working Ready signal" TFM meant a ready signal that only goes low when the drive really is ready.

Bryce.


Actually it's quite a bit of software. Aside of SymbOS also FutureOS has problems. I'm thinking of altering my disc functions (as option), but don't know if there is currently enough free space in the ROMs.
TFM of FutureSoft
Also visit the CPC and Plus users favorite OS: FutureOS - The Revolution on CPC6128 and 6128Plus

Offline TFM

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Hi All! Do we have a picture to show where to find f.e. pin 2 on a floppy disc connector? (Hereby I mean the connector at the floppy disc).


Does the CPC actually need the signal "_CHNG" on pin 2 of the floppy connector? ??
TFM of FutureSoft
Also visit the CPC and Plus users favorite OS: FutureOS - The Revolution on CPC6128 and 6128Plus

Offline dragon

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If i renember o.k the original manuals of amstrad have a draw of all connectors with the pins name.

Offline GeoffB17

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Yes, having a ready signal that works would be nice, but my 3.5" drive manages fine without.   So I'm not sure there's any point in worrying.


I'm using a cable wired up as per Ron King's PCW site, where the ready line is connected to show a permanent ready, but with a break button to press, which is required mainly to keep DISCKIT happy.   I guess there are other pieces of software that may insist/check that all drives are empty, so it will be needed for that too.


This works fine for me.   Saves all the trouble of trying to 'fix' the drive?


Geoff

Offline Blurredman

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This is an old topic, but I can add two 5.25" disc drives.

TEAC FD55-GFR -

Modificaitons required:
Jumper change right angle from DC to RY,
Jumper change - New jumper on I - Forces 300rpm
Jumper change - New jumper on LG - Forces DD instead of HD
Desolder Resistor (r19) to change track from 80 to 40. If you wish- you could install a switch with connections to the end of resistor and board to implement an on the fly change. May or may not need to be done. Could depend on how disc images were put onto the disc from a PC.


Mitsubishi MF504C-318UG -

Modifications required:
Move jumper from DC to RY,
Move jumper from SB to SS (Forces 300rpm)
Attach new jumper to SS/ND (Changes capacity to DD instead of HD)

Not had an issue with 40/80 track. Didn't need to change this as it worked out of the box fine..
« Last Edit: 13:01, 31 December 18 by Blurredman »

Offline GUNHED

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Great new information. Thanks a lot!  :)
http://futureos.de --> Get the revolutionary FutureOS (Recent update: 2019.01.14)
http://futureos.cpc-live.com/files/LambdaSpeak_RSX_by_TFM.zip --> Get the RSX-ROM for LambdaSpeak :-) (Ver.: 2018.08.15)

Offline Blurredman

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Can add the NEC FD1157C -

Modifications required:
Move jumper from DCG from pin1/2 to pin 2/3,
Move jumper from HDE pin 1/2 to pin 2/3 (Forces 300rpm)
EDIT: Remove jumper from DEN selection 1. Leave 3 options open.


There is no documentation that I could find, other than this: http://matthieu.benoit.free.fr/FD1157C_Nec.htm
« Last Edit: 01:14, 09 January 19 by Blurredman »

Offline Blurredman

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The TEC FB-502 5.25" drive

An older drive. Out of the box single head 360k unit. Most notibly found, or small varient of, on BBC's and Acorns in the UK.

Position is already set to 1 from the factory (0-3 being position).

Ready signal is only found by shorting pins 33 and 34 on the cable.
« Last Edit: 10:59, 04 February 19 by Blurredman »