First post, by andreja6
I have a Tandy 1000EX without the external floppy drive.
Is there any pinout diagram? I could only find an internal drive pinout.
I want to see if I can create an adapter cable for it
I have a Tandy 1000EX without the external floppy drive.
Is there any pinout diagram? I could only find an internal drive pinout.
I want to see if I can create an adapter cable for it
https://www.tindie.com/products/cyberneticsys … drive-adapters/
you can pick up an adapter off tindie that converts it to a normal floppy pinout.
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BloodyCactus wrote on 2021-06-24, 00:03:https://www.tindie.com/products/cyberneticsys … drive-adapters/
you can pick up an adapter off tindie that converts it to a normal floppy pinout.
I would really rather not, I saw that listing and there is no way in hell I'm paying 40 dollars shipping
Looking here: ftp://ftp.oldskool.org/pub/tvdog/tandy1000/do … ents/cables.txt
There's a section on floppy drives that looks useful, and in particular it gives the pins on the tandy connector that carry power. +5V on 3,5,7,9,11 and +12V on 29,31,33.
[editing to add the following after realising I misunderstood...]
Found a technical reference for the Tandy 1000EX here https://colorcomputerarchive.com/repo/D ... 0Sams).pdf
That has a schematic showing the connections to J13 the external 30 pin floppy connector.
Looking at that, I think the pinout is:
+12 1 2 +5
+12 3 4 +5
GND 5 6 +5
GND 7 8 +5
GND 9 10 INDEX
GND 11 12 TAK0
GND 13 14 STEP
SIDE 15 16 BMTRON
CDIR 17 18 AGND
WRPAT 19 20 AGND
RDATA 21 22 AGND
WDATA 23 24 AGND
WEN 25 26 AGND
NC 27 28 +12
DSEXT 29 30 +12
Which looks like a fairly close mapping to the standard PC floppy connector:
SIDE = SIDE1 pin 32
CDIR = DIR pin 18
WRPAT= WPT pin 28
RDDATA = RDATA pin 30
WRDATA = WDATA pin 22
WEN = WGATE pin 24
DSEXT = DRVSB pin 12
INDEX = INDEX pin 8
TAK0 = TRK00 pin 26
STEP = STEP pin 20
BMTRON = MOTEB pin 16
I'm not certain about the DSEXT and BMTRON and how they map to the Drive Select and Motor On pins. I also think that the pin 2 input to a standard floppy probably wants to be grounded. Doesn't look like there's a disk change or ready signal.
I also did the mapping, turned out to be same as yours.
On internal side, DS wire is connected to DS0 of internal drive, externally we should also connect it pin selected by drive (e.g. DS1 for DS1-set drive).
I will order some 30 pin edge and 34 pin ide connectors then will make a prototype on perfboard and maybe make a PCB later.
snufkin wrote on 2021-06-24, 06:35:Looking here: ftp://ftp.oldskool.org/pub/tvdog/tandy1000/do … ents/cables.txt […]
Looking here: ftp://ftp.oldskool.org/pub/tvdog/tandy1000/do … ents/cables.txt
There's a section on floppy drives that looks useful, and in particular it gives the pins on the tandy connector that carry power. +5V on 3,5,7,9,11 and +12V on 29,31,33.
[editing to add the following after realising I misunderstood...]
Found a technical reference for the Tandy 1000EX here https://colorcomputerarchive.com/repo/D ... 0Sams).pdf
That has a schematic showing the connections to J13 the external 30 pin floppy connector.
Tandy1000EX_DriveB_Pinout.jpgLooking at that, I think the pinout is:
+12 1 2 +5
+12 3 4 +5
GND 5 6 +5
GND 7 8 +5
GND 9 10 INDEX
GND 11 12 TAK0
GND 13 14 STEP
SIDE 15 16 BMTRON
CDIR 17 18 AGND
WRPAT 19 20 AGND
RDATA 21 22 AGND
WDATA 23 24 AGND
WEN 25 26 AGND
NC 27 28 +12
DSEXT 29 30 +12
Which looks like a fairly close mapping to the standard PC floppy connector:
SIDE = SIDE1 pin 32
CDIR = DIR pin 18
WRPAT= WPT pin 28
RDDATA = RDATA pin 30
WRDATA = WDATA pin 22
WEN = WGATE pin 24
DSEXT = DRVSB pin 12
INDEX = INDEX pin 8
TAK0 = TRK00 pin 26
STEP = STEP pin 20
BMTRON = MOTEB pin 16
I'm not certain about the DSEXT and BMTRON and how they map to the Drive Select and Motor On pins. I also think that the pin 2 input to a standard floppy probably wants to be grounded. Doesn't look like there's a disk change or ready signal.