https://www.tindie.com/products/cyberneticsys … drive-adapters/

you can pick up an adapter off tindie that converts it to a normal floppy pinout.

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:

1+12		1	2	+5
2+12		3	4	+5
3GND		5	6	+5
4GND		7	8	+5
5GND		9	10	INDEX
6GND		11	12	TAK0
7GND		13	14	STEP
8SIDE	15	16	BMTRON
9CDIR	17	18	AGND
10WRPAT	19	20	AGND
11RDATA	21	22	AGND
12WDATA	23	24	AGND
13WEN		25	26	AGND
14NC		27	28	+12
15DSEXT	29	30	+12

Which looks like a fairly close mapping to the standard PC floppy connector:

1SIDE = SIDE1 pin 32
2CDIR = DIR pin 18
3WRPAT= WPT pin 28
4RDDATA = RDATA pin 30
5WRDATA = WDATA pin 22
6WEN = WGATE pin 24
7DSEXT = DRVSB pin 12
8
9INDEX = INDEX pin 8
10TAK0 = TRK00 pin 26
11STEP = STEP pin 20
12BMTRON = 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 […]
Show full quote

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.jpg

Looking at that, I think the pinout is:

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1+12		1	2	+5
2+12		3	4	+5
3GND		5	6	+5
4GND		7	8	+5
5GND		9	10	INDEX
6GND		11	12	TAK0
7GND		13	14	STEP
8SIDE	15	16	BMTRON
9CDIR	17	18	AGND
10WRPAT	19	20	AGND
11RDATA	21	22	AGND
12WDATA	23	24	AGND
13WEN		25	26	AGND
14NC		27	28	+12
15DSEXT	29	30	+12

Which looks like a fairly close mapping to the standard PC floppy connector:

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1SIDE = SIDE1 pin 32
2CDIR = DIR pin 18
3WRPAT= WPT pin 28
4RDDATA = RDATA pin 30
5WRDATA = WDATA pin 22
6WEN = WGATE pin 24
7DSEXT = DRVSB pin 12
8
9INDEX = INDEX pin 8
10TAK0 = TRK00 pin 26
11STEP = STEP pin 20
12BMTRON = 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.