Pasmo (emscripten version)

Emscripten conversion for Pasmo, a multi-platform Z80 cross-assembler. It can be used to compile assembly language programs for the ZX Spectrum.

This is based on Pasmo 0.5.5 which is available from https://pasmo.speccy.org

Usage

npm install pasmo

import pasmo from "pasmo";

const asm = `
    org 30000

tv_flag    equ 5C3Ch

start
    ; Directs rst 10h output to main screen.
    xor a
    ld (tv_flag),a

    ld b, 50

another

    push bc

    ld hl,hello
again    ld a,(hl)
    cp 0
    jr z, exit
    push hl
    rst 10h
    pop hl
    inc hl
    jr again

exit
    pop bc
    djnz another
    ret

hello    db "Hello, world.", 0Dh, 0

    end start`;

const tap = pasmo(asm);

Build library

Pin the SDK to the 3.1.x line: newer Emscripten releases change how custom Module properties reach the pre/post-js hooks, which breaks this package's input/output plumbing. Alternatively build with the matching Docker image, from the repository root:

docker run --rm -v "$PWD:/src" -w /src -u $(id -u):$(id -g) \
    emscripten/emsdk:3.1.31 sh -c 'mkdir -p build dist && cd build && \
    emcmake cmake -DCMAKE_BUILD_TYPE=Release .. && make && cp pasmo.js ../dist/pasmo.js'

Note that you need to have the Emscripten SDK installed and available on path.

Install & activate emsdk from Emscripten:

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk/
git pull
./emsdk install 3.1.31
./emsdk activate 3.1.31
source ./emsdk_env.sh

Build the library:

npm install
npm run build
npm run test

Versioning

The npm version tracks the version of the vendored upstream tool (currently Pasmo 0.5.5). Wrapper-only changes (module glue, packaging) bump the patch level beyond the upstream number.

Licenses

Pasmo

(C) 2004-2022 Julián Albo.

Use and distribution allowed under the terms of the GPLv3 license.

emscripten-fs-example

MIT License

Copyright (c) 2018 Damián Silvani

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.