from C64scene homepage:

Tomi Malinen is currently developing a dual SID board, although there are other solutions available for your C64 this one is interesting because of the ability to use either 6581 or 8580 as SID #2 no matter the board revision.

This means that you can play games with 6581 sound from the first channel and 8580 sound from the second.

Other features of the dual SID board are:

• Small board, only about 40mm x 50mm.
• SID #2 address jumper selectable between D400, D420, D500, DE00, DF00.
• MSSIAH-compatibility at DE00.
• Full game compatibility with double mono setting at D400.

Installation requires soldering, two wires attach to the cartridge port and two have to be soldered to the Kernal IC. When the SID #2 is mapped to D400, D420, D500 the wires to the cartridge port are not used.

Photo of both protypes installed:

source: c64scene.com lemon64.com

My SIO2SD interface is dead (without any valid reason) after 2-3 hours of playing demos/games.

I have tried to reprogramming the firmware with a STK500 USB ISP Programmer and the tools AVRDUDE and it has worked perfectly.

The functions keys (Start / Option / Select / Reset..) of my Atari 130 XE not making good contact, i have fixed this problem with a good clean-up and graphite of a pencil.

This is a Joystick Adapter for Apple IIc, with this adapter you can use the Apple ][ Plus Joystick.

Joystick Adapter Pinouts:

12►

Some fixes for the Electron Data Recorder ALF03.

• Fixed the output Audio.
• Replace the belt.
• Clean the tape head and fix the Azimuth.
• Fixed the Powersupply cable.
• Self made RGB Cable.
• Self made Data Recorder Cable (DIN 7 PINs).

Click here for my Acorn Electron computer.

Autopsy:

This is my homebrew C2N232 Interface.

from Marko Mäkelä’s homepage:

The C2N232 is a small RS-232 interface that can be plugged to the cassette port of an 8-bit Commodore computer:

• PET series: 2001, 3000 series, 4000 series, 8000 series, 200 series
• PET-II series: CBM 500, 600 or 700 series (P500 or the B series)
• Commodore VC-20, VIC-20 or VIC-1001
• Commodore 64, 4064, 64c or 64G
• Commodore 128, 128D or 128DCR
• Commodore 264 series: 16, 116, plus/4 or 232

source: Marko Mäkelä’s Homepage

My homebrew Powersupply adaptor for Amstrad CPC 6128 with a External Floppy Drive 3½.

source: cpcwiki.eu jrp king homepage kjthacker.f2s.com

Parados Installation Photo Gallery:

ParaDOS is 16kB ROM that replaces the AmsDOS. Allows to use double-sided floppy disks and some more disk formats.

source: grimware.org

Foto review of the Serial cable and Transfer program:

ADTPro may be used to transfer Apple diskette/disk images in DOS or ProDOS/SOS format.

The Apple client side happens to run under ProDOS or SOS, but it is perfectly capable of reading or writing Apple DOS (or Pascal, or CP/M, or…) diskettes.

source: adtpro.sourceforge.net

My homebrew Powersupply adaptor & RGB/Audio Scart cable for Amstrad CPC 464/6128.

source: cpcwiki.eu jrp king homepage kjthacker.f2s.com

I have bricked my fonera and now the power light comes on but the fonera reboot cycling. I cannot access the web gui /ssh or telnet through redboot. Serial Connection fix all  my problems.

Gallery:

source: dd-wrt.com

Replacement the Sinclair QL membrane and reassemble the Keyboard.

source: rwapsoftware.co.uk

I’m the creator of the SID 6581<>8580 Switcher (here the original project).

I’m Very happy to see my project on the net. Arkanoid (a user of Lemon64 Forum) has done a very nice PCB with some fixes. Very nice job.

This is not a SId2Sid Clone.

source: lemon64.com

Autopsy:

The PLA chip (906114-01) used in the Commodore C64 is a generic 82S100 gate array with custom programming.

Its logic functions were dumped and reverse engineered by the community and are available from a variety of sources. This PLA uses the Xilinx CPLD XC9536 to emulate perfectly the PLA of the Commodore 64.

Download: Xilinx CPLD XC9536 JED C64 PLA + Eagle (2232)

source: zonadepruebas.com

Some Screenshots :

source: atari-forum.com