Tag: rom

Adds banked memory for running RomWBW, CP/M, and Z-System.

The current kit is the memory configuration used by RC2014 Zed and Zed Pro. It replaces both separate ROM and RAM modules in a Classic II or Pro; a Mini can use it only after its onboard ROM and RAM chips are removed.

Recreates Apple's Revision C SCSI card with termination power and onboard active termination for improved drive compatibility.

The GGLABS Tindie store says the seller is taking a break and offers a return notification rather than a current order path. The project page provides software and technical material, but says parts of its pseudo-DMA and IIgs-mode schematic documentation remain incomplete.

Loads cartridge images and XEX files from USB-managed flash storage through an inexpensive RP2040-based Atari XL/XE cartridge.

A8Renegade's live Shopify product data and collection reported the assembled cartridge orderable on 2026-07-27, despite a contradictory sold-out label in the rendered product page. The complete open design also remains buildable.

Improved firmware for the Apple IIc and IIc Plus, offered as a current ROM programming service.

Infinity Products listed its ROM 4X and ROM 5X flashing service without an out-of-stock marker on 2026-07-24. The open firmware project had a current March 2026 release.

Adds a reprogrammable, four-bank ROM adapter for ROM 0 Apple IIgs systems.

The adapter is currently listed as out of stock. It cannot convert a ROM 0 or ROM 1 Apple IIgs to ROM 3.

Replaces Apple III boot, synchronization, video, and bipolar state-machine ROMs with modern EEPROM carrier boards.

JCM's current Apple III categories listed all fourteen variants on 2026-07-24. Representative boot, sync, video, and bipolar pages showed stock, but availability can differ by part number. These adapters are position-specific replacements, not interchangeable upgrades.

Current and buildable replacement ROMs for early compact Macs with a customizable bootable ROM disk and HD20 support.

On 2026-07-24 JCM showed eleven 128K/512K modules and nine Plus modules in stock. Infinity Products also listed standard and spare-ROM kits without an out-of-stock marker. Installation requires opening the Macintosh, removing its ROMs, and soldering three or four address and write lines to the mainboard. BMOW provides the original parts list, Gerbers, assembly instructions, Flash Tool, and ROM data.

Adds flexible ROM sizing and the ability to page ROM out for a full 64K of RAM.

Current options include a standard or ZIF socket and optional blank or programmed PROMs. The base kit excludes a ROM. A ZIF release bar can foul a nearby logic chip unless the chip is lowered, the socket is reversed, or the bar is shortened. 28C EEPROM support is described as untested.

Recreates the Senior PROM utility and protection-bypass board for compatible Apple IIe systems.

The assembled board was out of stock on 2026-07-24. The standard configuration is for an enhanced NTSC Apple IIe with 128K and two 5.25-inch drives. It does not fit a Platinum IIe; PAL and unenhanced versions require special arrangements with the vendor.

MSX cartridge kit for 8 KB through 64 KB DIP28 EPROMs, including a switchable dual-32 KB mode.

The current storefront listed bare-board and kit configurations without an out-of-stock marker on 2026-07-24. Neither the IC socket nor EPROM is included.

Moves an SE/30 ROM onto a PDS card, bypassing the aging ROM SIMM socket and adding a bootable 2 MB ROM disk.

The store listed the PDS ROM Card at $39 with selectable flashed-ROM and chipless configurations on 2026-07-27. The vendor does not support chipless purchases because programming and ROM preparation can be difficult. A long-term installation should replace the included test clip with a soldered jumper.

Provides a menu-driven utility cartridge or a bare board for building a custom multi-EPROM C64 cartridge.

The complete new-old-stock cartridge was out of stock, but bare genuine boards were in stock on 2026-07-24. A bare board includes no case or EPROMs. Building a custom cartridge also requires legally sourced Promos or Promenade Menu Maker software, which CBMSTUFF cannot distribute, plus EPROM programming and assembly.