SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2010-10-16 – release 0.10.0pre3

• Bugfix: Wheels 128 loader detection fixed.
• Bugfix: G-P answer fixed.
• Bugfix: Strip 0x0d from file names when appropiate.
• Wheels support.

source: sd2iec.de gitweb forum thread c64-wiki

A new version of the firmware for the interface 1541 Ultimate II is released.

Some major fix:

• Some debug stuff that appeared in menu removed!
• Tape Record implemented.
• Capabilities register added (for V1 compatibility later)
• Initial version of memory controller for V1 hardware added.
• Global menu items replaced by menu objects that can generate menu items based on the object’s state.
• Some bug-fixes.
• Christmas lights eliminated in many places.
• 64K AR/RR Ram support added; as well as made to pass CountZero’s test program with 71 points.
• Freezer bug is NOT yet tackled.
• Preliminary USB hub support added (not finished)
• Tape recorder software file created, but is still a copy of playback. Needs to be implemented.
• IEC processor implemented.
• Some clean up done in USB code.
• C2N Recorder added to Fpga makefiles. (not for 250e yet)
• TAP Encoder added.
• ZPU altered for guaranteed IRQ handling (not used yet)

download: 1541ultimate.net

A new version of the firmware for the interface 1541 Ultimate II is released.

Some major fix:

• C1541 rom load now supports loading 8K roms (E000-FFFF only).
• File name now defaults to directory “/SdCard/Part0″. Use ‘/’ at the beginning to override.
• Comment added in the application
• Various bugfixes in path code. [IMPORTANT!]
• Version updated to 2.0RC8.

download: 1541ultimate.net

A new version of the firmware for the interface 1541 Ultimate II is released.

Some major fix:

• Update fixed => C64 should be taken out of reset otherwise keyboard won’t work.
• RTC speed correction implemented.
• Screen flicker removed by not clearing the screen upon “draw()”
• Double file name fixed at create D64.
• C64 kept in reset to avoid basic screen before cart screen.
• C1541 rom load fixed.
• Delete file implemented.
• Sorting of dir entries (DIR first) still needs to be tested.
• REU Filetype added.
• Double filenames fixed.
• Rename fixed (I think!)
• Error handling improved, error strings added.

download: 1541ultimate.net

A new version of the firmware for the interface 1541 Ultimate II is released.

Some major fix:

• Added: Built-in flash protection to avoid more units to ‘die’.
• Fixed: Joystick Right on PRG file still crashes UltimateII.
• Fixed: Mount & Run starts disk mounted Write Protected.

download: 1541ultimate.net

Finally! after a long time the new version of the Firmware for the interface SIO2SD is realesed under GPL Open-Source.

The SIO2SD is a device that allows you to load games/applications into any 8-bit Atari XL/XE computers via SIO interface from SD/MMC cards.

Changelog:

• Configuration is now available from Atari Screen – press K3 key (no need to disconnect the cable from the SIO).
• Loader for the executable files has been replaced with a new version.

source: sourceforge.net sio2sd.gucio.pl marcinprusisz.pl

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2010-08-06 – release 0.10.0pre1

• GEOS 2.0 support (d64/d71/d81 images only)
• File-based M-R emulation.
• Removed “oldnkc” configuration.

source: sd2iec.de gitweb forum thread c64-wiki

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2010-08-02 – release 0.9.3

• Bugfix: Extension hiding works again with names >12 characters.
• Bugfix: Increase data hold time during standard TALK.
• Testing aid: card detect-to-LED function.

source: sd2iec.de gitweb forum thread c64-wiki

from 1541 Ultimate homepage:

• Last firmware version: 2.0RC5 is now downloadable from the download page.

• Ultimate-II sources released!

You can access them through  http://svn2.xp-dev.com/svn/1541UltimateII/.

For those who know how to use SVN, you can do a checkout to create a local working copy by typing:

svn co http://svn2.xp-dev.com/svn/1541UltimateII/trunk

in an empty directory. I am working on a short manual, and on access to the tools needed to build the project. This time, the FPGA sources have been released as well. ;-)

source: 1541ultimate.net

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2010-06-21 – release 0.9.2

• Bugfix: Rename was broken on FAT.
• Turbodisk is now disabled when running on internal RC clock.
• Button debounce timeout increased.

source: sd2iec.de gitweb forum thread c64-wiki

from 1541 Ultimate homepage:

Finally, the software for the 1541 Ultimate II is finished. In the last two weeks, an enormous amount of work has been done:

• USB is now working stable, including insertion and removal.  (My external 500 GB harddisk was detected flawlessly!)
• Support for USB devices with multiple LUNs (like card readers)
• GCR (G64) supported added, including write (the Ultimate-I couldn’t do this)
• T64 file support re-integrated.
• Tape support, using TAP files (I needed to test the hardware anyway!)
• Comprehensible menus.
• Real time clock functional  (still need a clock widget…)
• I made a wooden mould, to simplify closing the plastic cases without damaging them.

The plan is, to ship the first 40~50 units this coming Wednesday! The remaining units will follow as soon as possible!  Thank you for your patience!

source: 1541ultimate.net

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2010-03-07 – release 0.9.1

• Bugfix: Filling unused REL records used wrong offsets.
• Bugfix: Unbreak case-insensitive matching of FAT file names.
• Bugfix: Fix raw directory mode for D64/D71/D81.
• Bugfix: Tell the display about REL files too.
• Add preliminary support for the ATmega1284P.

source: sd2iec.de gitweb forum thread c64-wiki

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family.

The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64. Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2009-02-28 – release 0.9.0

• Bugfix: REL offset calculation for records 256,512,…
• Bugfix: Non-REL P command parameters now match README.
• Bugfix: Reading after EOI behaves correctly now.
• Red LED only active while unwritten data in memory.
• Remove XC,XJ commands.
• New fastloader: ULoad Model 3.
• New fastloader: G.I. Joe (said to be commonly ripped)
• New fastloader: Epyx FastLoad cartridge.
• Support reading raw directory ($ with secondary > 0)
• “display disk images as directories”-mode.
• DNP support.
• Remote display support.
• Build system doesn’t require gawk anymore.

source: sd2iec.de gitweb forum thread c64-wiki

SD2IEC is a hardware mass storage device using an SD/MMC card and interfacing with the IEC bus. It is based on the ATmega644 microcontroller from the Atmel AVR microcontroller family. The most prominent use of SD2IEC is emulation/replacement of a Commodore-1541 disk drive for a C64.

Hardware and the microcontroller’s firmware is available as open source (GPL).

Changelog:

2009-12-16 – release 0.8.3

• Bugfix: Really prevent random corruption on FAT32 media.
• Bugfix: Free buffer after copying files.

source: sd2iec.de gitweb forum thread c64-wiki

1541 Ultimate Firmware v1.7 Beta Features:

• The freezer has been made more robust. (Needs more testing)
• Minor fixes in the IEC interface. (but not yet satisfactory)
• SID player has been added.
• Epyx Fastloader cartridge has been added.
• Support for custom carts has been added (8K/16K, as well as existing carts)
• Support for (custom) Ocean and System3 cartridges added.

source: 1541ultimate.net