99 lines
3.8 KiB
Fennel
99 lines
3.8 KiB
Fennel
(local util (require :lib.util))
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(local lume (require :lib.lume))
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(local {: parse} (util.require :presentation.engine))
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(local core (require :core))
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(local style (require :core.style))
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(local h
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{:style true
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:font (renderer.font.load "presentation/font/PrintChar21.ttf" (* 64 SCALE))
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:color style.caret
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:justify :center
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:topPadding (* style.padding.y 2)
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:lowerPadding 64})
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(local **
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{:style true
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:font (renderer.font.load "presentation/font/PRNumber3.ttf" (* 32 SCALE))
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:color style.text
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:justify :left
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:pause-after true})
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(fn p [style] (lume.merge style {:pause-after true}))
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(fn np [style] (lume.merge style {:pause-after false}))
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(fn bgimg [filename] {:image filename :justify :center :overlay true :alpha 0.3 :topPadding 0})
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(fn view-cleanup [view]
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(let [root core.root_view.root_node
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node (root:get_node_for_view view)]
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(when node (node:close_active_view root))))
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(fn openfile [filename ?split]
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{:action (fn []
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(let [focused-view core.active_view
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d (core.open_doc filename)
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focused-node (core.root_view:get_active_node)
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node (when ?split (focused-node:split ?split))
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view (core.root_view:open_doc d)]
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(when ?split (core.set_active_view focused-view)) ; don't switch focus
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#(view-cleanup view)))})
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(parse [
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[h "" "" ""
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"Honeylisp"
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"" "" ""
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(np **) "Jeremy Penner"
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"https://spindleyq.itch.io/"
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"https://blog.information-superhighway.net/"
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"https://bitbucket.org/SpindleyQ/honeylisp"
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"https://gamemaking.social/@SpindleyQ"
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"https://twitter.com/SpindleyQ"
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{:pause-after true}]
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[(bgimg "presentation/pics/pete286.jpeg")
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h "Some Background"
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** "In 2019 I built a 16-bit MS-DOS game engine."
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"* Built on hardware"
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"* Using only period-appropriate software (Turbo C, NeoPaint)"
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"* Powered by Forth"
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"* Integrated custom tools"
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"* Interactive development via serial terminal"]
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[(bgimg "presentation/pics/ggj2020.jpeg")
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h "Neut Tower"
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** "In 2020, I did the Global Game Jam on my 286."
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"Finished 'Shareware Episode 1' a couple of months later."]
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[h "The Idea"
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** "What if I took a similar DIY approach with modern tooling?"
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"* I'd done Forth; what about Lisp?"
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" https://fennel-lang.org/"
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"* How far can I push fast iterative development?"
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"* Could I integrate an editor?"
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"* How can I leverage emulation?"]
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[h "Step 1: Assembler"
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** "Represent instructions using Fennel data literals"
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(openfile :asm/asm.fnl :right)
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" [:lda 0xff]"
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"Represent labels with Fennel strings"
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" :loop [:bne :loop]"
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"Lexical scope with nested blocks"
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" [:block :loop (generate-loop-code) [:bne :loop]]"]
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; ;; DEMO before tech dive
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[h "Wait WTF Is An Assembler"
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** "It's just converting mnemonics to bytes, right?"
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{:image "presentation/pics/assembly-markup.png" :justify :center :pause-after true}
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"Whoooops, actually the hard part is converting labels to addresses"
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"Zero-page instructions are a different size, which messes up data layout!"
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"Initial pass is needed to gather all symbols to determine sizes"
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"What about data?"
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" [:db 123] [:dw 12345] [:bytes \"HELLO WORLD\"] [:ref :hello]"
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"Must be able to line up bytes on page boundaries"
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" [:align 0x100]"]
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[h "Step 2: Virtual Machine"
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{:image "presentation/pics/thinkhard.png" :justify :center}
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** "Not super keen on writing a complicated compiler"
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"I'm already very comfortable with Forth"
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"Let's build a stack machine!"
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"\"Direct threaded\" inner interpreter"
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"\"Immediate words\" can be Fennel functions that generate code!"]
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[h "Extensible Assembler??"
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** "How do you turn code into bytes?"
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" [:vm 1 2 :+ :.]"]
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])
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