8271FDC & 3.5" drives, DFS1.20+hacks

discussion of beeb/electron applications, languages, utils and educational s/w
Post Reply
User avatar
CMcDougall
Posts: 6130
Joined: Wed Feb 02, 2005 3:13 pm
Location: Shadow in a Valley of Scotland
Contact:

8271FDC & 3.5" drives, DFS1.20+hacks

Post by CMcDougall » Tue Jul 18, 2017 10:04 pm

maybe one for jgharston :?

One of my beebs does not like the original DFS1.20 with 31/2" drives,
so gave the ones a try from JGH site, being: http://mdfs.net/Apps/Filing/
now, the version DNFS302 (v1.21) was blown onto a 16k eprom, some games now work
but, when I save something, the drive makes the noise and steps up while saving,
then, after a hard break, either the disc is corrupt or the saved file is gone :(

it's not the drives, as tried 6 brand 'new' ones different makes, & 3x 8271FDCs

is this known? as when back on the other/s 1770FDC DFS2.26 they save fine & disc not corrupt.

going by the info for DNFS303 (v1.22), it just helps the NFS printers, so prob no change in the FS

I also found this version many moons ago, flip knows where from, so may try too......
Attachments
dnfs120a_for_8271_bbc_with_3-5drive.zip
DFS1.20 hack ROM
(12.71 KiB) Downloaded 27 times
ImageImageImage

User avatar
flaxcottage
Posts: 3117
Joined: Thu Dec 13, 2012 8:46 pm
Location: Derbyshire
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by flaxcottage » Tue Jul 18, 2017 10:55 pm

The 8271 does not like 3.5" floppy drives. There are mods that can be done to drives and there is a modified DFS available. If you Google it the page comes up.

Best to use a 177x chip and DFS 2.26 with 3.5" drives.
- John

Why do I keep collecting Acorn gear? I'm going to need a considerably bigger man-cave. :?

duikkie
Posts: 2879
Joined: Fri Feb 07, 2014 3:28 pm
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by duikkie » Wed Jul 19, 2017 4:18 am

the 3.5 inch disks has not hole :) ti index that is the problem. the 8271 need a hole ! so to mod is to think that there is a pulse from index hole .

User avatar
lurkio
Posts: 1660
Joined: Tue Apr 09, 2013 11:30 pm
Location: Doomawangara
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by lurkio » Wed Jul 19, 2017 9:00 am

I used Acorn DFS 1.20 in an 8271 Model B with 3.5" drive to test Raven Wood. The drive had been modded by Sprow, to try to restore missing index pulses, but I still kept getting the error "Drive fault 10 at 43/C1 at line 2540".

So I replaced DFS 1.20 with jgh's patched DFS 1.21 (DNFS 3.01), and the error went away.

:idea:

BBCB+64K
Posts: 221
Joined: Mon Mar 22, 2010 9:51 pm
Location: North Norfolk
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by BBCB+64K » Wed Jul 19, 2017 1:17 pm

ISTR one of my BBC B's is fitted with a Watford DFS 1.44 and don't remember any issues saving to 3.5" DD disks. Give that a try.

Steve
My current setup...

BBC B+ 128k with external DataCentre with 2GB CF Card, 64MB ARM7TDMI Co-Processor and BeebOPL.

User avatar
CMcDougall
Posts: 6130
Joined: Wed Feb 02, 2005 3:13 pm
Location: Shadow in a Valley of Scotland
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by CMcDougall » Thu Jul 20, 2017 8:03 pm

lurkio wrote:drive had been modded by Sprow, to try to restore missing index pulses, but I still kept getting the error "Drive fault
glad I did not waste £24! :D
regarding the 'keyboard' setting on bottom right, the keyboard with this beebB had it, so gave them a go....
so putting switch up to on for 3&4 ..... done nothing apart from different sounds from drive when loading/saving :?
BBCB+64K wrote:one of my BBC B's is fitted with a Watford DFS 1.44 and don't remember any issues saving to 3.5" DD disks
gave that a go cheers Steve, but is actually worse, even with switch 3&4 on/off off/on done no difference,
games do not load, give Drive Fault too :(

So, I would say, as John said, the hacks are utter useless, BUT, when loading ADFS1.30
the 8271FDC does not even look at the rom at all, so least it's not that daft! :lol: :mrgreen:

IF :-k :?: someone does another DFS1.20 hack (or 0.90) then the best test is this, as a bullet proof test:
put any file 3/4 of the way on the disc, in my case 'MENU'
LOAD"MENU"
*VER.0
beeb hangs here, so if anyone can get round this (on Drive0 80T) then it's a winner,
as DNFS301/2 (1.21/1.22) and my upload at start of thread is [-(
ImageImageImage

BBCB+64K
Posts: 221
Joined: Mon Mar 22, 2010 9:51 pm
Location: North Norfolk
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by BBCB+64K » Fri Jul 21, 2017 12:34 pm

Colin, are the drives PC 3.5" HD ones? When I tested my Beeb B with 3.5" disks, it was a Cumana DD drive. So maybe your particular machine doesn't like HD drives :-k

Steve
My current setup...

BBC B+ 128k with external DataCentre with 2GB CF Card, 64MB ARM7TDMI Co-Processor and BeebOPL.

User avatar
CMcDougall
Posts: 6130
Joined: Wed Feb 02, 2005 3:13 pm
Location: Shadow in a Valley of Scotland
Contact:

Re: 8271FDC & 3.5" drives, DFS1.20+hacks

Post by CMcDougall » Fri Jul 21, 2017 6:35 pm

^they are yes, only maybe got a DD drive in my master compact PSU unit, but not taking that to bits to confirm these errs.

defo using the blue discs with one hole as always 8)
ImageImageImage

Post Reply