Welcome to Our Dreambox World - Japhar Sim - SuperSim
Forum Stats
9006 Members
224 Forums
6622 Topics
17970 Posts

Max Online: 1031 @ 09/30/17 03:50 AM
Newest Members
aldor443, pgiame, vadalv, ayyan08, velezano
9005 Registered Users
Who's Online
23 registered (Toysoft, WarLord, Admin, tizio61, Melgas, john.does.great, ludo19, maurizio2b, raffsif1234, havik30, kadcpr, andyros, nino12, Florin, kyk65, deny, mic71, OMEGA, Rombanek 1983, velezano, sof, aldor443, MrBledi), 84 Guests and 444 Spiders online.
Key: Admin, Global Mod, Mod
Shout Box

Top Posters
Admin 7950
Toysoft 2042
fairbird 700
satsedhu 531
ludo19 422
Top Posters (30 Days)
Admin 51
satsedhu 19
Toysoft 16
Bobo360 11
andyros 9
August
M Tu W Th F Sa Su
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31
Topic Options
#1734 - 06/11/15 06:37 PM Apple II : Build your own SD Floppy
Admin Online   content
Japhar Member
Carpal Tunnel

Registered: 10/19/10
Posts: 7950
The board :

Available on ebay here, http://www.ebay.com/itm/201369802455



Details how to build it from Nishida,

http://tulip-house.ddo.jp/DIGITAL/SDISK2/english.html

For UNIDISK version click here.

Admin

--------------------

SDISK II - DISK II emulator for APPLE II




Introduction

SDISK II is a DISK II emulator for Apple II series. You can use an image on an SD card instead of a 5 inch floppy disk.


Manual

Connecting an SDISK II with a DISK II INTERFACE CARD, an APPLE II can read from and write to a DOS 3.3 image (NIC file) recorded on an SD card. NIC is an original format, and a NIC file and a DSK file can be converted mutually.

An SDISK II selects a NIC file whose update time (time stamp) is the latest in the all NIC files that exist on the root directory of the SD card. When there is no NIC files on the root directory, the NIC file is generated from the DSK file with the latest update time automatically. The LED blinks while generating a NIC file.

The mutual conversion between a DSK file and a NIC file is done on PC. nic2dsk converts a NIC file to the DSK file, and dsk2nic is vice-versa.

Windows (source & binary, tested on XP)
Mac OS (source & binary, tested on 9, 10.2 and 10.3)

You can convert a DSK file to the NIC file by dragging it into dsk2nic icon. You can convert a NIC file to the DSK file by dragging it into nic2dsk icon.

Java (tested on Java 1.7.0_25)

I implemented a Java version. Double click DSK_NIC.jar, and drop a DSK file or a NIC file which you want to convert.


About INIT

Formatting the disk (INIT in BASIC, RWTS command 4) is not fully supported. SDISK II does not actually format the image, only ignore the command. SDISK II may cause an error or consume a long time while formatting the image on the SD card. I recommend to format the DSK file with an Apple II emulator.

I recommend to skip the INIT part (line 250) of COPYA.


About Write Protect

The disk image is write protected eather if the NIC file is read only, or if the LOCK switch on the SD card is ON.


Notes

Please be sure to format the SD card with FAT16.

If you can not mount a NIC file, remove the card and plug it again several times. Plugging it, confirm that the LED lights up immediately, and goes out.

I confirmed that an SDISK II works with an Apple II JPLUS, an Apple IIe and an Apple II GS (ROM1). Apple II ROM3 also supported (Oct.25/2013).

About Apple IIc, see the blog article Connect an SDISK II with an Apple IIc.

I've just confirmed the read, write and initialize operations with RWTS routines.

The speed of writing doesn't reach DISK II, and it depends on the kind of the SD card.

To prevent accidental data loss, please make sure you have the backup.

I designed SDISK II assuming that you use an SD card between 32MB and 2GB, but there may be compatible problems.


Hardware Connections

See connector below.


Notice

Any damage when SDISK II is used is not guaranteed in Nishida radio.


Firmware, Schematic and PCB

You can download the firmware source code and the schematic here.

You can get the PCB gerber file here.

Remark : use Hirose DM1B-DSF-PEJ SD card socket

In fact, the archive of UNISDISK firmware also includes another firmware of SDISK II which also has a SmartPort emulator. Thanks

I thank to the customers who bought the SD card reader, the former work. I thank to everybody who have opened various technical intelligence to the public.


Connector

Code:
					/	\			
1	3	5	7	9	11	13	15	17	19
2	4	6	8	10	12	14	16	18	20



Code:
1:GND
2:STEP0
4:STEP1
6:STEP2
8:STEP3
10:WRITE REQUEST'
12:+5V
14:DRIVE ENABLE'
16:READ PULSE
18:WRITE SIGNAL
20:WRITE PROTECT
others:NC


Attachments
pic0.jpg

pic1.jpg

pic2.jpg

connector.jpg

sdisk2util.zip (8 downloads)

_________________________

Top
#1735 - 06/11/15 06:37 PM Re: Apple II : Build your own SD Floppy [Re: Admin]
Admin Online   content
Japhar Member
Carpal Tunnel

Registered: 10/19/10
Posts: 7950
Quote:
798-DM1B-DSF-PEJ82 (SDCard socket )
595-SN74HC125N ( U2 )
717-9B-27.000MAAJ-B ( XTAL )
556-ATMEGA328P-PN ( 105C temp rating )
511-L78L33ACZ ( U3 )
576-39501250440 (fuse, 125ma)
667-ECA-0JM221 ( C1,C2 )
594-K100J15C0GF5TH5 (C3,C4)
594-K104K15X7RF5TH5 ( C5 )
594-K223K15X7RF5UH5 ( C6 )
710-61202023021 (20pin IDC)


Attachments
sdisk2util.mac.zip (3 downloads)
DSK_NIC.jar.zip (4 downloads)
sdisk2.zip (13 downloads)
CAM_SDISK2_328.zip (11 downloads)

_________________________

Top
#1762 - 06/12/15 08:00 PM Re: Apple II : Build your own SD Floppy [Re: Admin]
Admin Online   content
Japhar Member
Carpal Tunnel

Registered: 10/19/10
Posts: 7950
Unidisk source code compatible with .dsk files,

Admin


Attachments
UNISDISK_SDISK2P_20140719.zip (6 downloads)

_________________________

Top
#18284 - 03/11/19 06:05 PM Re: Apple II : Build your own SD Floppy [Re: Admin]
Didier Dubos Offline
stranger

Registered: 03/11/19
Posts: 1
Loc: France
Hi,
This is for the UnisDisk floppy emulator. It won't work with SD DISK II.
As Nishida doesn't make the card anymore, do you have any PCB or schematics ?
Best regards

Top
#18285 - 03/11/19 08:33 PM Re: Apple II : Build your own SD Floppy [Re: Didier Dubos]
Admin Online   content
Japhar Member
Carpal Tunnel

Registered: 10/19/10
Posts: 7950
Plamen still does them in Bulgaria, yes our japanese friend stop due to health problems.

Admin
_________________________

Top



Moderator:  Admin 
New Topics
update dm800se japhar
by tizio61
08/24/19 10:59 AM
Atmospheric discharge in DVI
by deny
08/24/19 12:25 AM
Mastering BTC (PDF)
by Admin
08/23/19 08:26 PM
MX-Sline (Full HD)
by fairbird
08/23/19 03:45 PM
DM900UHD 4K - OpenPLi 7.1Star (no picon appears)
by Melgas
08/22/19 05:52 PM
Understanding BTC cryptography, Engineering & Eco
by Admin
08/22/19 07:40 AM
Eutelsat 13° Est 8K Demo: In French 8K FTA
by Admin
08/21/19 07:30 PM
Pirate service beoutQ goes off air
by Admin
08/21/19 04:55 PM
New Japhar OS v6 with DM LATEST drivers supported!
by Bobo360
08/18/19 08:32 PM
Linux All-In-One For Dummies, 6th Edition (PDF)
by Admin
08/18/19 11:32 AM
EPG could not be installed
by andr3wz
08/18/19 12:40 AM
DDns e VPN
by Bobo360
08/17/19 09:10 PM