Tag: coprocessor

Adds an 8 MHz-or-faster Z80, 64 KB of onboard memory, and a beta CP/M environment through a 1090XL expansion slot.

The page reported one card in stock on 2026-07-27. CP/M customization and utilities remain late beta. The card is sold with or without a Z80; a user-supplied CPU must be rated for at least 8 MHz. The pictured 80-column RPP card is optional and not included. Double-density disk use also requires supporting drive hardware. The exact page names only the 1090XL, so confirm 1091XL compatibility before using it in that implementation.

Period 5 MHz 8088 coprocessor card with optional fast memory and an 8087 socket.

This is a period product obtained used. The AD8088 has 2K of onboard RAM expandable to 8K; larger programs need the separate AD128K in a nearby slot, and the AD128K cannot operate by itself. The original package included FTL math acceleration and the MET event timer. CP/M-86 and MS-DOS support depended on separately supplied operating-system software. A system needs at least 48K, a Language Card or equivalent, a disk drive, and a display. An 8087 may require extra cooling or an empty adjacent slot.

Published twelve-chip Motorola 6800 teaching coprocessor that takes control of the Apple II bus.

This is a published construction project, not a current kit or finished product. The paper supplies a circuit diagram and tested monitor listing but no PCB layout, Gerbers, bill of materials, or explicit reuse license. A builder must recreate the board, source period logic, program a 2716 EPROM, and validate timing and bus loading.

Published 1985 Apple II coprocessor prototype with a 68020, optional 68881, 32K SRAM, and boot EPROM.

Treat this as a historical experimental build, not a safe drop-in design. The creators used custom wire-wrapped and insulation-displacement construction rather than a published PCB. Later design notes estimate roughly 1 A typical and as much as 1.5 A from +5 V even though the Apple II specifies 500 mA shared by all peripheral cards, and they identify excessive data-bus loading. A faithful build needs its own engineering review and likely a redesigned power and bus interface.

Adds an ESP32 coprocessor with switchable composite video, 8-bit audio, and microSD-backed software to slot-bearing Apple II systems.

The MacEffects Apple II collection said Sold out on 2026-07-24. The card is not bootable: it needs a Disk II or SmartPort storage emulator, another supported block-storage card, or a physical floppy drive and blank disk. MacEffects was only the distributor and offered no technical support or warranty.

Adds a Microsoft SoftCard-compatible Z80 processor for running CP/M, with an optional turbo mode.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. Turbo mode requires a CMOS 65C02 or 65C816 host; systems with an NMOS 6502 must use normal mode.

Runs PCPI Applicard-compatible CP/M software on a dedicated 20 MHz Z80 with 512K of onboard RAM.

The GGLABS Tindie store was taking a break on 2026-07-24, so no current order could be placed. This card is PCPI Applicard-compatible, not Microsoft SoftCard-compatible; choose CP/M software and disk images for the Applicard environment.

Adds a DE10-Nano Linux coprocessor, 1080p HDMI video, DMA, storage, networking, and a framebuffer overlay to a Commodore 64.

The project remains under construction and its current releases are alpha previews. Carrier Gerbers, a BOM, placement data, and preview releases are available, but a DE10-Nano or compatible MisterPi board and the supplied SD image are also required. Change the default Debian root password before connecting it to a network.