Release write-ups and development notes for Copperline, a cycle-driven Amiga emulator written in Rust.
A WHDLoad-installed game boots straight from its archive, the launcher grows a browsable game library with OpenRetro cover art, --run warp-boots freshly built Amiga executables for developers, storage gains a lide.device-compatible IDE board with ATAPI CD-ROM, OFS directory mounts that boot Kickstart 1.3 and a Create Image workshop - and a studio building a new commercial Amiga game on Copperline…
An emulated Roland MT-32 - front panel and all - on the MIDI port, the host's real hard disks handed to the machine RDB and all, a HostSocket board giving guest applications BSD sockets with no TCP/IP stack to install, the physical floppy path rebuilt pure-Rust on FluxBridge, native IPF and CHD images, a redesigned menu tree, an authentic 1084 bezel, integer scaling and a performance overlay, and…
Real 3.5" floppy drives on the emulated bus through DrawBridge, Greaseweazle and SupercardPro, the A2065 bridged onto the real LAN, Picasso II / II+ RTG for the 24-bit machines, CRT shaders, screen tints and a 1084-style bezel, rewind and quick-save slots, autofire and input remapping, an experimental JIT CPU mode, and a WinUAE-inspired debugging suite.
RTG graphics through the Z3660 Zorro III board, Ramsey motherboard and CPU-slot accelerator RAM for the big boxes, an Ethernet backend that needs no privileges or setup, a telnet BBS dialled over emulated serial, configurable floppy speed, and enough 68040 MMU and 31 kHz display work to boot Debian Linux/m68k to a login prompt.
The repositories have moved from my personal LinuxJedi account to a new GitHub organisation, CopperlineHQ, because Copperline is becoming a community bigger than just me. Repository names are unchanged, the old URLs keep redirecting for the foreseeable future, and a Discord server for development discussion is on the way.
The whole emulator compiled to WebAssembly and running client-side at copperline.dev/try, A3000 / A4000 profiles booting from their onboard SCSI and IDE, host-directory mounts gone writable, a JSON-RPC control protocol for scripted live sessions, SCSI CD-ROM drives with CD audio, and any controller in either game port.
Host directories mounted - and booted - as live AmigaDOS volumes, the blitter's BLTPRI bus fence, a 68000 microcode write-ordering pass, sprite serialization measured against other emulators and real hardware, and a 6x cut in worst-case frame times on slower hosts.
The 68060 joins the CPU line-up, the 68030/68040 gain real MMU and cache behaviour, the debugger grows a command console plus Video, Audio and IO Map tabs, and the A4091 SCSI board, MIDI and TCP serial bridges and zipped floppies arrive.
An 80-bit 68881/68882 accuracy pass with pure-Rust softfloat, explicit joystick input selection, save states that restore without the original ROM, and the usual round of CIA, Paula, keyboard and display-timing fixes.
The no-config machine launcher, external WASM Zorro board plugins, A2065 Ethernet with a loopback backend, and a long list of sprite, Denise and bitplane timing fixes.
Expanded machine profiles, conditional and counted breakpoints, warp-speed frame skipping, and the first macOS .dmg release builds.