On Mar 24, 19:24, Aaron Christopher Finney wrote:
> Does anyone happen to have, in some vast catacombs of old manuals/docs,
> the jumper info for a Panasonic JU-475-2GRJ 5 1/4" floppy drive? Or maybe
> you can shed some light on what the following sections/jumpers might do?
>
> DS/MX
> DO/DC
> LR/RD
> DD/IX/SP
> AT/AX
> BX/CX
> HM/HS/HL
> MS/MM/HA/OA/DA
I had a similar problem with my Panasonic drive. It's a slighlty different
suffix, but here's what I got when I phoned their tech support:
==============================================================================
Panasonic JU-475-2.AGG 5.25" DD/HD (Tech.Support 01344 853508, head office
01924 821010)
MX DS multiplex/drive-select
DS1..DS4 Drive Select
AT AX dual density control: AX latches it on DSn
BX CX dual speed control: BX = 2-speed, CX = 360, open = 300
IRD Internal READY signal
DD IX SP indicate DISK CHANGED on DSn/Index/Step
HM HS HL head load with motor-on/select/in-use
MS MM motor start with select/motor-on
HA OA DA UA activity LED with (select and in-use)/(select or
in-use)/select/(latch function, in-use)
1M force 1MB size (ie, not HD)
JX force high speed only
HH head load with select
GX enable true READY on read-data
FX enable true READY on index
DR ready enable on select
DO ?? door open ??
DC disk changed
LR
RDY READY
NO AR (no)Auto Recall (factory testing)
PR factory test
44 64 cylinder precomp for factory test
MN factory test
MSE factory test
==============================================================================
And for interest (OK, mostly mine!) here's some other drive info from my
meagre file. If anyone cares to expand upon it for my colection, I'd be
grateful for any recieved wisdom:
==============================================================================
Teac FD-55-BVU 5.25"
set DS1, U2, FG. Remove READY, link XT.
==============================================================================
Teac FD55-FB for XT 5.25"
DS1 HM SM IU
cut READY; MSDOS uses this for DISK-CHANGED
==============================================================================
Teac FD55-GFV-17 5.25" DD/HD
DS1 FG HG II DC U2
for 360K use DS1 FG LG I DC U2 and remove R19
==============================================================================
Mitsubishi MF504C-310MP 5.25" DD/HD
PC-AT/386 link settings; names are conjecture
IP no pins
SG
SB closed 300/360 rpm
SS 300 rpm only
NO
DS0
DS1 closed
DS2
MX
DS3
DD
HR
IL
IS
MM closed motor start with MotorOn
MS motor start with Select
IR internal Ready?
IU In Use?
RI closed
RD closed Ready?
DC closed Disk Changed? then why RD and DC both made?
SR Speed Ready?
==============================================================================
M4854-35 5.25" DD/HD
use DS0-3 as usual; MX = always selected
HS HM HC HL : HEAD LOAD with select/motor-on/normal/in-use
MM MS : MOTOR START with motor-on/select
DC 2S : link both for DISK CHANGED
SS SB : SS = 360 rpm; SB = 300/360 rpm
I think FG is FRAME GROUND
DC DISK CHANGED (instead of READY?)
2S double sided ?
==============================================================================
NEC FD1055 5.25" HD/DD -- settings for BBC Micro
DCG: 2
USE: 2
HDE: 2
LUS: 1 Note LUS, MON, HS, LED : unclear which pins the labels refer to
HS: 1
LED: 1,5
==============================================================================
NEC FD1138H 3.5" HD/DD
No jumpers visible
==============================================================================
Unmarked 5.25" 40-trk Asia Commercial FD108
solder joint for READY
has 2 LEDs
6-way shunt, ??/DS0/DS1/DS2/DS3/MUX set 101000 for AT
==============================================================================
Fujitsu M2551A.28 5.25" 40-trk
RDY link
==============================================================================
Fuji FDD5883AOK (Toshiba) 5.25" HD/DD
TM (made)
PS (made)
LD
D4/3/2/1
MUX
(link on interface pin2 to GND forces DD, disables HD)
DE/DX (made DX) speed fixed-at-fast/depends-on-pin-2 (low=slow)
SR
DC (made)
==============================================================================
TEC ND-352-TH-A 3.5" DD-only
has 0-ohm link for RDY/DC
DS0/1/2/3 selection
OK on BBC Micro
==============================================================================
Brother FB-620V 3.5" DD-only (OK side 0; won't write side 1 but reads OK)
==============================================================================
TEC ND-356-TA 3.5" DD/HD
OK on BBC with DS0 and pin2/?? don't care
links DS0/DS1/TZ/??
TZ connects to pin2 (open seems to be OK for DD on BBC)
0-ohm link for RDY/DC
==============================================================================
YE Data YD-702-6037 3.5" DD/HD
DS0/1/2/3 slide switch
P1 closed:LED with inuse or select; open: LED with select and motoron
P2 closed disable LED?
JP1 connects pin 2
==============================================================================
TEAC FD235-HF 3.5" DD/HD
HHO
OP
LHI pin2 low = HD, high = DD ??
HHI pin2 low = DD, high = HD ??
normal setting seems to be OP and HHI closed; works on 286/386/486dx/BBC
or OP closed; works on Carole's 386 and my Intel
486sx
tends to give verify hiccups on tracks 9/19/29 etc on BBC
OP+LHI works on 286
BBC: pin2 to GND else set LHI
==============================================================================
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Thu Mar 25 1999 - 02:37:33 GMT