Tag: plus 4

3 matching upgrades

Showing 3 products.

StatusProductWhat it doesCompatibilityLinks
Check statusChecked Jul 30, 2026Commodore 1501 Power Monitor Familyby Independent Australian builder
power monitorvoltage monitoruser portreset buttonc64vic 20c128plus 4

External displays for checking the 5 VDC and 9 VAC outputs of Commodore power supplies, with the MkII adding current measurement under load.

The exact review was published in March 2020 and a February 2023 comment says the seller was still making the monitors. The review describes an unofficial Commodore-styled product made by an unnamed Australian builder, not a verified Commodore-manufactured accessory. A current-looking Pocket 1501 eBay route failed exact Tavily extraction and failed again after the required 60-second retry under WF-068, so its maker, stock, price, package, and relationship to MkI and MkII remain unverified. The separate FDD II drive-supply monitor is not folded into this host-monitor family. This device displays readings; no automatic cutoff, regulation, over-voltage clamp, fuse, or other protective action was verified.

Sources
  • Commodore 64 Exact model
  • Commodore VIC-20 Exact model
  • Commodore 128 Exact model
  • Commodore Plus/4 Exact model
Commodore 1501 Power Monitor MkII reviewPocket 1501 marketplace route
Build itChecked Jul 30, 2026Diag264 Diagnostic ROM and Harnessby Rob Clarke, with OpenC16Cart hardware by SukkoPera
c16plus 4teddiagnostic cartridgediagnostic romtest harnessloopback testram testrom testkeyboard testcassette portiecuser portaciapalntscdiyrepair

DIY diagnostic ROM and loopback harness for PAL and NTSC Commodore 264-family computers.

Rob Clarke's current download directory offered Diag264 0.97 on 2026-07-30. The maker also offers a programmed EPROM at media and postage cost by email. The software is CC BY-NC-ND 4.0: unmodified personal distribution with attribution is allowed, but modification and commercial resale are prohibited. The maker warns that some third-party marketplace copies were unauthorized or modified. Loopback hardware may be resold when the attribution conditions are met.

Sources
  • Commodore 16 Exact model
  • Commodore 116 Exact model
  • Commodore Plus/4 Exact model
  • Commodore V364 Exact model
Diag264 project and manualDownload Diag264 0.97Build the OpenC16Cart cartridge
Check statusChecked Jul 30, 2026Ray Carlsen Custom Commodore Power Suppliesby Ray Carlsen
power supplyreplacement psumulti systemc64c128vic 20plus 4c16

Custom replacement supplies ranging from simple C64 units to multi-connector systems for several Commodore computers and drives.

The readable C64 OS feature was last modified in September 2022 and gave a USD 35-100 range for standard examples, with more elaborate custom builds possible. It directed orders and inquiries to Ray Carlsen by email. Both linked maker pages failed Tavily extraction and failed again after the required 60-second retry under WF-066 and WF-067, so current ordering, prices, model names, electrical ratings, protection, and mains options must be confirmed directly. Do not transfer the specifications or simultaneous-device behavior of one custom build to another.

Sources
  • Commodore 64 Exact model
  • Commodore 128 Exact model
  • Commodore VIC-20 Exact model
  • Commodore Plus/4 Exact model
  • Commodore 16 Exact model
Ray Carlsen custom power-supply feature