520 lines
14 KiB
Plaintext
520 lines
14 KiB
Plaintext
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TODO:
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- NaN in cycle count for macros
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- debugging of scan line overflow
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- confuse code/data in listing
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- show memory locations hovering over lines
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- don't check against ROM signatures
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- DASM
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- macro forward refs
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- labels start with . omit timing info (isCode)
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- spaces in filename don't parse code listing (DASM, maybe more)
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- asm: support macro expansion
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- multiple breakpoints, expression breakpoints
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- watchpoints
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- step over (line, instruction)
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- slowdown beam for all platforms?
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- intro/help text for each platform
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- show self-modifying code insns left of editor
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- update Javatari version? (and others?)
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- sound mute?
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- $error updates source editor
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- online tools for music etc
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- text log debugging script
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- vscode/atom extension?
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- click to break on raster position
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- debug bankswitching for funky formats
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- 'undefined' for bitmap replacer
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- requestInterrupt needs to be disabled after breakpoint?
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- C/asm source formatter
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- allow download of JSASM output
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- update bootstrap to 4.0
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- batariBasic: proper line numbers, debugging
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- builds:
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- compiler flags for final ROM build
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- workermain: split build functions, better msg types
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- what if >1 file with same name? (local/nonlocal/directory)
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- what if .c and .s names collide?
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- maybe put stuff in examples/ dir?
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- error msg when #link doesn't work
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- warning when ROM too big
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- detect "libcv.h" and include library automagically?
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- sdcc:
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- can't link asm files before c files (e.g. acheader.s must be last)
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- figure out area names ordering
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- debug inline asm
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- live coding URL
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- resize memory browser, other windows when vertical div resize
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- markdown, verilog: can't share
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- https://www.crowdsupply.com/tinyfpga/tinyfpga-bx
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- stego shareable images (http://pico-8.wikia.com/wiki/P8PNGFileFormat)
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- https://makecode.com/language?
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- open ROM from URL?
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- game starts even if switched away before first load
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- put globals into view/controller objects
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- autostart audio
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- chrome: https://github.com/processing/p5.js-sound/issues/249
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- firefox: https://support.mozilla.org/en-US/kb/block-autoplay
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- touch support
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- better undo/diff for mistakes?
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- ide bug/feature visualizer for sponsors
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- global undo/redo at checkpoints (when rom changes)
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- landscape mode for arcade ports
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- symmetric load/save state types (like in Machine)
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- pixel editor
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- persist palette/tilemap selections
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- more tools for editing
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- map editor
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- arbitrary nametable editing
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- metasprites
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- throw errors when bad/no refs
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- per-View keyboard shortcuts
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- parse labels
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- parse .incbin directives?
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- can't replace in hex directives
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- should maybe use same single-canvas editor for map + char editor
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- undo doesn't refresh editor
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- editing sometimes messes up cursor movement (CURBS)
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- crt0.s compiled each time?
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- debug highlight doesn't go away when debugging -> running
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- show breakpoint of PC or highest address on stack
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- can we highlight line instead of select?
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- profiler
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- profiler restarts emulator when paused
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- running profiler while replaying? grand unified replay?
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- click on profiler to step to position
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- breakpoints stop profiler from running
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- single-screen profiler
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- hide labels that aren't available, like BIOS addrs
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- show interrupts, other events
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- sometimes interleaves two different PCs? like two profilers running simultaneously?
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- ah, symbols persist across builds
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- Verilog
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- larger scope range, better scrolling
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- make scope data wrap around range
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- remove FPS and play controls when Verilog scope paused
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- when paused scope doesn't work
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- Safari: scope doesn't show while CRT in use (sometimes Firefox too)
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- verilog debugging/reloading makes it slow
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- why loadState() on verilog kill perf?
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- quantify verilog "graph iterations"
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- toolbar overlaps scope
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- CPU debugging
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- use $readmem for inline asm programs?
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- can't add control instructions b/c of split
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- bad error msg if >2 moduels and top module doesn't match filename
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- separate Scope View
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- Audio doesn't work if clock != default
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- single-stepping vector games makes screen fade
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- break on stack overflow, illegal op, bad access, BRK, etc
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- show in scope instead?
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- nes
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- replay doesn't work for nes (force background tile redraw, sprites
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messed up)
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- nes debug view toolbar
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- support NES_HEADER_16K?
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- NES crt should mark raster pos when debugging
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- OAMDMA in profiler? (haltCycles)
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- typed arrays don't serialize?
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- JSNES
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- doesn't support hiding >8 sprites
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- doesn't do sprite zero test right
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- doesn't do clip right
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- doesn't do b/w tint
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- vcs
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- sometimes still plays when paused on FF
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- vcs: INPTx needs to be added to control state
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- vcs: break on # of lines changed (maybe using getRasterPosition?)
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- chrome looks blurry on vcs
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- VCS asm game library
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- VCS skips step on lsr/lsr after run to line
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- better VCS single stepping, maybe also listings
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- upgrade to 4.1 for Supercharger format
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- upload multiple files/zip file to subdirectory
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- allow "include graphics.asm" instead of "include project/graphics.asm"
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- convert more stuff to Promises
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- don't have to include firebase always?
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- squelch error msgs?
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- test offline? (if window.firebase)
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- Github
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- platform_id/repo.platform mismatch (can't leave repository)
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- handle overwrite logic
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- what to do about included files?
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- can published files retain path?
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- what if import interrupted and partial files?
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- CORS for some blobs?
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- don't import useless files
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- support projects with subdirectories, file list?
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- switching platform of a repo?
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- make sure to flatten subdirs
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- re-publish repo (bug: doesn't put all files in local repo after publishing)
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- allow text/binary change
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- importing from subtree commits to root anyway
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- publishing Markdown file loads default file?
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- better text/binary detection (e.g. 0xa9 copyright)
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- going into repo chooses wrong file if republished with different main
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- keyboard shortcuts
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- ctrl+alt+l on ubuntu locks screen
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- alt-D doesn't work anymore
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- facade/kbd shortcuts for emulators, focus
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- maybe eat key events? ("'" messes things up)
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- cookie
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- list of stuff for policy
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- popup
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- convert binary to hex stmts
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- "suggestions" (vblank overrun, variable # scanlines, etc)
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- SMS
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- can't step back twice?
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- compiler bug in chase
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- "shared" in URL doesn't work, leave in URL? (also importURL)
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- 6502
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- KIL stops debugger
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- TypeError: null is not an object (evaluating 'n.destination')
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https://8bitworkshop.com/v3.4.1/javatari.js/release/javatari/javatari.js
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(32:443651) Safari 12.1.2
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- Safari: doesn't send good exception reasons ("undefined")
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- probably XMLHttpRequest.timeout (https://github.com/getsentry/sentry-javascript/issues/2210)
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- C64
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- disk image support
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- https://github.com/cc65/cc65/issues/946
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- player 2 joystick and keyboard conflict
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- problems with cgetc()
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- upgrade to ES2020?
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- https://github.com/microsoft/TypeScript/issues/16577
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- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
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- need Edge 79+
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- no import in workers
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- copy to gen/ directory (allowJs is weird)
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- ca65 line numbers are not aligned with source code
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- segments not read properly
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- Debug Browser
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- more stuff like 7800 display lists
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- don't include start/end line on platforms w/o raster timing
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- BIOS symbols
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- show current tool for file
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WEB WORKER FORMAT
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{code,platform,tool,dependencies}
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{preload}
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new:
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{updates,buildsteps}
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[{filepath,platform,tool}]
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implicit rules
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- push/shift build steps
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- preprocessor, compile, assemble, link
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- access to intermediate files
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only build files that have changed
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build options
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BUILD PROJECT
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local/foo.project/*.*
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build all files in project
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send update for dependencies at startup (single file version)
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should be able to change file w/o reloading (Not platform tho)
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pulldown selects file in project, or goes back to parent
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gotta preserve editor windows for each one - window list
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make source/disasm window visible when debugging
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gutter info/errors in all files
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UI REFACTOR
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editor
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debugger
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disasm view
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memory
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profile
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errors
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separate into files
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window methods:
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- set
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- mode
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- get
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- changes
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- cursorActivity (inspect)
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- gutters (setCompileOutput)
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- current line / gutter marker (setCurrentLine / clearCurrentLine)
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- source map
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- global symbols
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- pixel editor / find comment (openBitmapEditorAtCursor)
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- update debug window (200 ms)
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- inspect variable
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file store mirrors that on worker
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worker result:
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{
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output:<rom>
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sources:{
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<path>:{lines, asmlines, listing}
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}
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}
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add file to errors
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http://www.playvectrex.com/designit/chrissalo/vectordisplay.htm
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http://oldies.malban.de/secondvectrex/index.htm
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PIXEL EDITOR
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everything is an editor
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back/forward propogation
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encoded <-> raw + spec + palette(s) <-> full tilemap <-> selected tile/sprite/metasprite
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need references
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panes: source code, metadata tree, graphics panes
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decoded info:
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- CHR tiles
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- palettes
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- maps/rooms
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- metasprites
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- metatiles
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- sprite data (williams etc)
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store in intermediate single file or embed in C/ASM?
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we'd then have to generate C/ASM probably automatically
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intermediate file could still be edited
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switch between hex/graphic editor? (palettes should edit via hex)
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final display types: number, color, sprite, etc
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CHR editor has palette selector, obj selector
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individual objects in single file or multiple files?
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RLE compression
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Types
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- byte
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- RGBA color
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- structured object
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- metasprite
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- metatile
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- level actor
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- bitmap
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- array of stuff, array can have a shape (width,height) like numpy
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Mappers can refer to multiple objs
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Slice (window) of array for selections
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AssetEditorView
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- scan files for assets
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- build hierarchical view of assets
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- expand/collapse
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- create editor upon expansion
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- double-click to source file
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Assets come from:
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- chr files
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- bitmap data in files
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- structured data (palette, sprites, metasprites, levels, etc)
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- think about new comment format, platform-specific types
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Programmatic Asset Language
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- load PNG, draw image, or generate bitmap font
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- split into images
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- paletteize
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- fit into tileset/spriteset
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- NES: 8x8 or 8x16 tiles
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- 7800: 256xN slice
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- VCS: 24xN playfield, 8xN sprite, 32xN big sprite
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- generate data file (asm/c/bin)
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- generate char mapping
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- tile generator (makechr-like)
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- metasprites too
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- RLE compression
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- check constraints
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---
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Github Support
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Import
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Export
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Login
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Pull
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Push
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Git metadata kept in local storage
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Converting from NESASM to DASM
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- asl a -> asl
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- subroutine keyword on labels
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- [zp],y to (zp),y
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- LOW(x) and HIGH(x) to <() and >()
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- .db to .byte, .dw to .word
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- use NES_HEADER macros
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- no .bank
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Cross platform NES/SMS/GG library
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- use CHR RAM
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- create flipped tiles/sprites
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- create alternate palette tiles
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- metatiles
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- cross platform music/sound
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- scrolling
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- row/column mask
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- no nametable mirroring in SMS
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- 256x240 vs 256x192
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Emulator Lib
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- move getPresets() (into presets/ dir?)
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- CPU interface
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- execCycle(), execInsn()
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- fix/unfix PC
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- interrupt
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- generic raster scanline platform
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- PlatformRunner
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- handles rewind, intra-frame breakpoint, debugging
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- profiling log, exec/read/write/intr (for each bus?)
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- expose video, audio, controller interfaces
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- new debugging info
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- memory map interface
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- "About" metadata
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- auto load/save state?
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- handle legacy
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- VCS
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- NES
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- MAME
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- MAME
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- debugging?
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- kbd instructions don't work
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Markdown (showdown) interface
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- add code patches to files
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- cursor shows current state/errors (must map markdown->src lines)
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- show preview emulator at each step (play button? run when viewed?)
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DOCUMENTATION
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memory map
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BIOS routines
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cc65 standard libs
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cc65 headers
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example headers (presets/*/*.h)
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libcv headers (src/worker/lib)
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ASM includes
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NETPLAY
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runs alongside of emulator, doesn't modify controls (just state)
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when controls change: player sends control inputs + frame#
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add latency so clients more often are in sync
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if miss latency window, client syncs state (moves forward a few frames?)
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state checksum?
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socket.io
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X86
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https://github.com/freebasic/fbc
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GW-BASIC
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http://www.grifo.com/SOFT/Pacific/uk_pacific.html
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http://www.cpm.z80.de/small_c.html
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https://github.com/open-watcom
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Free Pascal
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https://bellard.org/tcc/
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https://wiki.osdev.org/Smaller_C
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https://yasm.tortall.net/
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https://wiki.osdev.org/Tool_Comparison
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COMPONENT EMULATION
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Emulate discrete chips
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- verilog
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- js
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- wasm? (overhead?)
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Block diagram level
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Buses
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Insn/cycle timing
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Pos/neg clock edge
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Timers
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Polling vs. callbacks (https://github.com/floooh/chips)
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- callbacks might only affect devices internally, until next cycle
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CRT simulator
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Move leaf nodes to workers (sound chips)
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CPU opcode-step switch: https://floooh.github.io/2019/12/13/cycle-stepped-6502.html
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- macros are cool!
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Inspect bus edges and internal state
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type Bits<N> = number;
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interface Clocked { }
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interface BusListener<N> {
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recv(value : Bits<N>) : void;
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}
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class Bus<N> {
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listeners : BusListener<N>;
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send(value : Bits<N>) : void {
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}
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}
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function bus(bits : number) {
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return function(
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target: any,
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propertyKey: string,
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descriptor: PropertyDescriptor
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) {
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//descriptor.configurable = value;
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};
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}
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class M6502_T {
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IR : Bits<16>; /* internal instruction register */
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addr : Bus<16>;
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data : Bus<8>;
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@bus(16) address : Bus<16>;
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}
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Optimizations
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- ordered/delayed assignments
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- skip unused exprs
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- opcode -> fn table
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- bus protocols -> functions
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- state -> lookup tables or switch statements
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- vec[] -> bitmask
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- multiclock execution?
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STATE REWIND
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in Platform:
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advance?(novideo? : boolean) : number;
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advanceFrameClock?(trap:DebugCondition, step:number) : number;
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in devices:
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advanceFrame(trap:TrapCondition) : number;
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advanceClock() : void;
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advanceInsn() : number;
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Should call trap() every cycle or insn of frame, or exit when returns true?
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BETTER DEBUGGING
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Need to mark start/end columns, not just line number
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Know if we are actively debugging or trap occurred
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isRunning() = stopped, running, waiting, debugging...
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Showing running PC may be distracting, maybe lines visited?
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Don't grab cursor focus when trap occurs (how do we know?)
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Use tick() and refresh(), not callbacks
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Show current datum when using READ
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Use https://codemirror.net/doc/manual.html#markText
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Reset doesn't break @ start unless debugging tools expanded
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