The document outlines a detailed overview of a modified Commodore 64 system by Leif Bloomquist, emphasizing enhancements for convenience, capability, and enjoyment. Key modifications include a new blue paint job, stereo sound capabilities, multiple kernel options, and various peripherals such as joystick ports and an IDE64 interface. It also discusses several alternatives and additional components for enhancing the original system functionality.

1. The Ultimate Modded
64C
Leif Bloomquist
World of Commodore 2011

2. Ultimate Modded 64C
• Goal: Maximize convenience, capability and fun when
using the 64, using real hardware and without sacrificing
the overall experience.
• Modifications
• Blue Paint Job
• Stereo SID Sound
• Multiple Kernals
• Reset Button
• C128 Power Supply
• Peripherals
• Four Joystick Ports
• Port Switcher
• IDE64 v4 with RR-Net (Ethernet, USB, 20GB HD, CDROM)
• Alternatives

3. In the Beginning…. (~1986)

4. Modifications

5. Blue Paint Job
• Original paint job was done in 2003 with “Krylon Fusion”
• Began to chip and wear after a couple of years.
• New paint job is with “Vinyl Dye” in aerosol form
• Used for car interior detailing, etc.
• Forms a chemical bond with the ABS plastic that the case is made of
• In theory, will never chip or wear (bonds with plastic)
• We shall see!
• $20 Canadian
• Source: http://www.parasol.com

6. Stereo SID Sound
DualSID board by Tomi Malinen
Features
• Second SID can be either 8580 or 6581 with any C64 board assembly
• Second SID address is selectable from:
$D400, $D420, $D500, $DE00, $DF00
• Small PCB, only 40mm x 50mm
• Game compatibility
• Even non-stereo SIDs and games sound
better! (different filters on left/right)
Pricing
• PCB Only 5€
• PCB + Components Kits 10€
• PCB + Components Assembled 15€
Source: http://koti.mbnet.fi/malinto/dualsid/

7. Multiple Kernals
• 27C512 (64KByte) EPROM
• Room for 4x 8KB ROMs
• Switches on two highest address pins to select
1. Original C64 Kernal
2. JiffyDOS (from Jim Brain, www.go4retro.com )
3. Custom Kernal (name and colors)
4. Blank
Possibilities: Autoboot ROM, Japanese C64 ROM, …

8. Reset Button
• Momentary pushbutton that grounds the junction of capacitor C43,
the anode of diode CR5, and pin 5 of IC U23.
http://personalpages.tds.net/~rcarlsen/cbm/reset64.txt

9. Case Badge
• Taken from a non-functional Commodore PC 10-III found
on eBay for $5.

10. C128 Power Supply
• Bought a C128-style power plug from Click Here software
back in 2002.
• Simple adaptor box to switch to C64 style plug.

11. Peripherals

12. Four Joystick Ports
• User port joystick adaptor
• Two additional ports on back of C64
• About a dozen games support the interface (original or
modified)
• 15 € (schematic is online for free)
Source: www.protovision-online.de or www.icomp.de

13. Joystick Port Switcher
• Switches Port 1 and Port 2 with
press of a button
• Saves wear&tear on ports
• Works with joysticks, paddles, mice, and lightpens
• No software changes required
• $35 Australian (~$38 CDN)
• Source: http://c8d.cbm8bit.com

14. IDE64 v4
• “Kitchen Sink” of C64 Peripherals
• IDE (Hard Drives and CD-ROMs)
• Compact Flash
• Ethernet (Amiga Clock Port for RR-Net)
• USB (for PC Virtual Drive “PCLink”)
• Software Enhancements
• BASIC Extension (CD, DIR, CDOPEN, MKDIR, HDINIT, many
more)
• Machine-language monitor
• PC-style “BIOS” for configuration
• Split-screen file manager

15. IDE64 v4 (Page 2)
• Compatibility
• Cassette port still available
• Works great with JiffyDOS
• All single-file games work as-is
• Multi-file games need to precisely match
the CBM-DOS specification (most don’t)
• Hundreds of games have been “Fixed”
to be IDE64 compatible.
• Most common issue: Drive 8 hard-coded
• Raw Speed
• Over 100 times faster than a 1541 floppy drive
• Most games load in a fraction of a second
• 99 €
• Source: http://news.ide64.org

16. Photo Gallery

17. Painting

18. Left Side
Stereo Output
Kernal Switches 2nd SID Address Select (Rotary)

19. Right Side
Reset Button

20. Under the Hood
Stereo Output Reset Button
27C512
DualSID
Kernal
Switches
5V and Ground Connections
2nd SID Address Select (Rotary)

21. All Done!

22. Alternatives

23. Alternatives to IDE64
1541 Ultimate
• Re-implementation of a 1541 in an FPGA
• Use D64 or PRG files on a USB stick or SD Card
• Compatibility
• Virtually 100% - *is* a 1541
• Appears on IEC bus
• …but runs at original 1541 speeds
• Other
• Two drives can be simulated
• Even outputs the audio from the simulated drive (head motion, etc)
• 129€
• Source: http://www.1541ultimate.net

24. Alternatives to IDE64
uIEC
• Compact Flash or SD Card reader
• Uses IEC bus, leaves cartridge port free
• Works great with JiffyDOS!
• $50 USD (plus extras as needed)
• Source: http://www.go4retro.com
• Available from Jim Brain, right here at WoC

25. 64NIC+ (Alternative to RR-Net)
• Standalone cartridge
• RR-Net compatible
• $50 USD
• Source: http://www.go4retro.com
• Available from Jim Brain, right here at WoC

26. Alternatives to DualSID
Internal Stereo SID
• Similar to DualSID with extra features:
• More addressing options: Any 32-byte range between $D420-$D4E0 and
$DE00 to $DFE0
• Bus noise cancellation
• PCB only $5.95
• PCB+kit $29.95
• Assembled $39.95
• Source: http://www.digitalaudioconcepts.com
StereoInSID
• Similar to other options, but added “digi-fix” for 8580 SIDs
• Can mix and match and SID types
• More complicated installation
Source: http://www.stereoinsid.de.vu/ (or buy mine!)

27. Alternatives for Multiple Kernal ROMs
Zzyzx
• Select a Kernal at startup
using the 64’s keyboard (F1-F7)
• $35 Australian
Source: http://c8d.cbm8bit.com
ROM-el ROMEliminator
• 128KB Flash-based EPROM alternative
• 24 or 28 pins
• $10 US
Source: http://www.go4retro.com (Jim Brain)
EasyFlash 3
• Stay tuned….

28. Questions?