Tag: c64c

Boots before the normal KERNAL to diagnose RAM and ROM faults on a Commodore 64 that cannot reach its startup screen.

Retro Rewind listed its cartridge in stock at CAD 22 on 2026-07-30. TFW8b documented a compatible alternative for C64, C64C, SX-64, and C128 in 64 mode, but that listing was out of stock. Wait up to 60 seconds for a result. The original 781220 RAM routine covers only the lowest 4 KB, and the cartridge does not test the chips and I/O covered by a harness kit.

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.

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.

Replaces a missing or failed Commodore power indicator with a prewired round or rectangular LED assembly selected for the case and motherboard layout.

AMI64 listed its red breadbin and C64C choices for GBP 4.95 on 2026-07-30. Poly.play also maintained separate current short and long C64C and breadbin product routes. Retroleum listed original and new round and rectangular assemblies but was temporarily closed until approximately the beginning of August 2026. Color is cosmetic, but LED shape and cable length are not: choose them for the exact case and board position. Confirm current stock before ordering.

Rehouses an original or replacement Commodore 64 motherboard in a newly manufactured C64c shell made with the original injection molds.

Individual Computers listed the Breadbin Gray version for EUR 59.50 and immediate delivery on 2026-07-30. Its explicit variant route also listed a transparent polycarbonate version for immediate delivery. The transparent shell can show small bubbles and surface marks because the original molds were not designed for transparent material. Historical Pixelwizard offerings included Breadbin Gray, Classic Beige, Retro Black, and SX-64 Style cases, but that 2017 range must not be treated as the current color list. The default unqualified product route failed twice under WF-072; use an explicit current variant page.

Open ROM adapter that selects alternate C64 KERNALs through the RESTORE key and indicates the active bank with an LED.

The open project provides Gerbers, firmware, and programming guidance. Retro Electronics lists an assembled board, cables, LED, and blank 27C256 or W27C512, but its page did not expose a current stock or ordering state on 2026-07-25. Users must program legally obtained ROM images; the seller specifically notes that JiffyDOS and JaffyDOS require licenses.