Tag: port test

3 matching upgrades

Showing 3 products.

StatusProductWhat it doesCompatibilityLinks
AvailableChecked Jul 30, 202664 Doctorby Trilogic / Shareware Plus; sold by Protovision
c64diagnostic cartridgeloopback testciasidrom testport testrepair

Tests major Commodore 64 chips, ROMs, interrupts, controls, and external ports with a cartridge and loopback plugs.

Protovision announced that 64 Doctor was back in stock on 2026-07-21. The product page listed eight units at EUR 35 with a one- to two-week shipping estimate on 2026-07-30. A detailed 2019 review identifies Tim Harris of Shareware Plus as the licensed manufacturer and demonstrates the test sequence, but it does not establish equivalent sound-test behavior for an 8580 or replacement SID, the SX-64, or a C128 in C64 mode.

Sources
  • Commodore 64 Exact model
64 Doctor product pageJuly 2026 restock announcement64 Doctor hands-on review
AvailableChecked Jul 30, 2026C64/C128 586220 Diagnostic Harness Familyby Sven Petersen and Commodore service design; assembled by several sellers
c64c64cc128sx 64586220785260diagnostic cartridgetest harnessloopback testram testrom testport testsid testciaopen hardwarerepair

Adds the loopback modules needed for complete 586220 C64 or 785260 C128 port and interface diagnostics.

Current routes on 2026-07-30 included Retro-Updates' EUR 17.95 harness with an Add to Cart path, Retro Rewind's CAD 75 harness with a one- to two-week lead time, Retro Rewind's separate CAD 22 C128 keyboard dongle in stock, and AMI64's GBP 49 complete eight-ROM kit. Retro Electronics had one complete kit on 2026-07-25 but documented only one tested PAL C64 board revision. Confirm the exact harness revision, cartridge, keyboard dongle, cable lengths, model settings, and included manuals before ordering. Human review found no evidence that the current retail dongle solves the documented C128DCR keyboard-jack power conflict.

Sources
  • Commodore 64 Exact model
  • Commodore 128 Exact model
  • Commodore SX-64 Exact model
586220 harness open projectHarness design and operating notesBuy the Retro Rewind harnessBuy the Retro Rewind C128 keyboard dongleBuy the Retro-Updates harnessBuy the AMI64 complete kitBuy the Retro Electronics complete kit
AvailableChecked Jul 30, 2026C64/C128 Diagnostic Cartridge Familyby Commodore service ROMs, Sven Petersen open hardware, and multiple current assemblers
c64c64csx 64c128781220586220785260dead testdiagnostic cartridgemulti rom1541burn in testsid testport testopen hardwarerepair

Packages 586220, 785260, and related service ROMs as current single-ROM and switchable multi-ROM diagnostic cartridges.

Current choices on 2026-07-30 included Retro Rewind's in-stock CAD 22 C64 586220++ and C128 785260 cartridges, its CAD 40 four-ROM C64 cartridge with a two- to three-day lead time, AMI64's GBP 19 eight-ROM C64 cartridge with an approximately seven-day lead time, ogHugo's USD 26.99 before-tax two-sided C64 cartridge with an Add to Cart path, Retro-Updates' EUR 17.99 two-sided C64 cartridge, and C64iSTANBUL's orderable two-ROM PCB with current fabrication files. DIY8BIT's USD 22.95 781220/586220 cartridge was unavailable while its Etsy shop was on break. Retro Rewind's older Dual Diag route now displays the store's not-found page. ROM sets and model support differ by variant; a full port test requires a separately bought or built harness.

Sources
  • Commodore 64 Exact model
  • Commodore SX-64 Exact model
  • Commodore 128 Exact model
Diag64cart open projectMulti-cartridge design and ROM notesBuy the Retro Rewind C64 586220++ cartridgeBuy the Retro Rewind C128 785260 cartridgeBuy the Retro Rewind four-ROM cartridgeBuy the AMI64 eight-ROM cartridgeBuy the ogHugo two-sided cartridgeBuy the Retro-Updates two-sided cartridgeOrder the C64iSTANBUL two-ROM PCBWatch the DIY8BIT two-ROM listing