Restructure for more reliable reload, modularity

This commit is contained in:
Jeremy Penner 2020-10-05 23:47:25 -04:00
parent a524f23dfe
commit 3c22f6fe2e
7 changed files with 664 additions and 628 deletions

96
asm.fnl
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@ -1,6 +1,5 @@
(local lume (require "lume"))
(local {: stream : kvstream : one} (require "stream"))
(local {: int8-to-bytes : int16-to-bytes} (require "util"))
(local opcodes {})
; op mode arg
@ -33,7 +32,7 @@
modemap))
(fn without-modes [modemap ...]
(let [newmodemap (table.clone modemap)]
(let [newmodemap (lume.clone modemap)]
(each [_ mode (pairs [...])]
(tset newmodemap mode nil))
newmodemap))
@ -89,43 +88,6 @@
[_] [nil nil]
_ (error (.. "Unrecognized syntax" (fv op)))))
; dat - anything that takes up space in the assembled output (op, dw, db, etc)
; takes the form [:op args]
; pdat - a parsed dat; takes the form {:type type :addr addr ...}
(local dat-parser {})
(fn new-block [] {:type :block :pdats [] :symbols {}})
(fn parse-dats [block dats]
(each [_ dat (ipairs dats)]
(if (= (type dat) "string")
(tset block.symbols dat (+ (length block.pdats) 1))
(let [opcode (. dat 1)
parser (. dat-parser opcode)
pdat
(if
parser (parser dat block)
(. opcodes opcode) (dat-parser.op dat)
(error (.. "Unrecognized opcode " (fv opcode))))]
(table.insert block.pdats pdat))))
block)
(fn dat-parser.op [op]
(let [[mode arg] (parse-mode-arg op)]
{:type :op :opcode (. op 1) : mode : arg}))
(fn dat-parser.block [block]
(let [dats (table.clone block)]
(table.remove dats 1)
(parse-dats (new-block) dats)))
(fn dat-parser.db [db] {:type :var :init (. db 2) :size 1})
(fn dat-parser.dw [dw] {:type :var :init (. dw 2) :size 2})
(fn dat-parser.bytes [bytes] {:type :raw :bytes (. bytes 2)})
(fn dat-parser.ref [ref] {:type :ref :target (. ref 2)})
(fn dat-parser.flatten [flat block]
(parse-dats block (lume.slice flat 2))
nil)
(fn make-env [block parent]
{:parent parent
:block block
@ -153,12 +115,43 @@
(self.parent:lookup-addr name)))})
(fn lo [v] (bit.band v 0xff))
(fn hi [v] (bit.band (bit.rshift v 8) 0xff))
(fn int8-to-bytes [i]
(string.char (lo i)))
(fn int16-to-bytes [i]
(string.char (lo i) (hi i)))
(fn program []
; dat - anything that takes up space in the assembled output (op, dw, db, etc)
; takes the form [:op args]
; pdat - a parsed dat; takes the form {:type type :addr addr ...}
(local dat-parser {})
(fn new-block [] {:type :block :pdats [] :symbols {}})
(fn parse-dats [block dats]
(each [_ dat (ipairs dats)]
(if (= (type dat) "string")
(tset block.symbols dat (+ (length block.pdats) 1))
(let [opcode (. dat 1)
parser (. dat-parser opcode)
pdat
(if
parser (parser dat block)
(. opcodes opcode) (dat-parser.op dat)
(error (.. "Unrecognized opcode " (fv opcode))))]
(table.insert block.pdats pdat))))
block)
(fn dat-parser.op [op]
(let [[mode arg] (parse-mode-arg op)]
{:type :op :opcode (. op 1) : mode : arg}))
(fn dat-parser.block [block]
(let [dats (lume.clone block)]
(table.remove dats 1)
(parse-dats (new-block) dats)))
(fn dat-parser.db [db] {:type :var :init (. db 2) :size 1})
(fn dat-parser.dw [dw] {:type :var :init (. dw 2) :size 2})
(fn dat-parser.bytes [bytes] {:type :raw :bytes (. bytes 2)})
(fn dat-parser.ref [ref] {:type :ref :target (. ref 2)})
(fn dat-parser.flatten [flat block]
(parse-dats block (lume.slice flat 2))
nil)
(local pdat-processor {
:op {}
@ -244,11 +237,14 @@
(set bytes (.. bytes pdatbytes)))
(set block.bytes bytes))
(fn program []
{:type :program
:org-to-block {}
:symbol-to-org {}
:start-symbol :main
: dat-parser
: pdat-processor
: new-block
:parse-dats (fn [self block dats] (parse-dats block dats))
:dbg
(fn [self ...]
(when self.dbgfile
@ -311,12 +307,12 @@
(self:pass :generate)
(when self.dbgfile
(self.dbgfile:close)
(set self.dbgfile nil)))
(set self.dbgfile nil))
self)
:upload
(fn [self machine]
(each [org block (pairs self.org-to-block)]
(machine:write org block.bytes)))
})
{: program : dat-parser : pdat-processor : new-block : parse-dats : lo : hi}
{:new program}

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@ -6,11 +6,6 @@ pp = function(x) print(fv(x)) end
lume = require("lume")
luars232 = require("luars232")
function reload(modname)
package.loaded[modname] = nil
return require(modname)
end
_coroutine_resume = coroutine.resume
function coroutine.resume(...)
local state,result = _coroutine_resume(...)

156
neut.fnl Normal file
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@ -0,0 +1,156 @@
(local lume (require "lume"))
(local asm (require "asm"))
(local VM (require "vm"))
(local {: lo : hi} (require "util"))
(local prg (asm.new))
; (prg:debug-to "test.dbg")
(local tiles (prg:org 0x6100))
(local vm (VM.new prg))
(local code1 vm.code)
(local mon {
:hexout :0xfdda
:putchar :0xfded
:bell :0xff3a
})
(fn achar [c] (bit.bor (string.byte c) 0x80))
(fn astr [s]
(-> [(string.byte s 1 -1)]
(lume.map #(bit.bor $1 0x80))
(-> (table.unpack) (string.char))))
; a handful of debugging words
(vm:def :.
[:lda vm.TOPH :x]
[:jsr mon.hexout]
[:lda vm.TOP :x]
[:jsr mon.hexout]
[:lda (achar " ")]
[:jsr mon.putchar]
(vm:drop))
(vm:def :stacklen
(vm:reserve)
[:txa] [:lsr :a] [:sta vm.TOP :x]
[:lda 0] [:sta vm.TOPH :x])
(vm:word :.s
:stacklen (prg:parse-addr vm.TOP) :swap
(vm:for :dup :get :. :inc :inc) :drop)
; Graphics routines
(vm:def :mixed-hires
[:sta :0xc050]
[:sta :0xc057]
[:sta :0xc052])
; starting address:
; 0x2000 + (x*2) + (y%4 * 0x100) + ((y/4) * 0x28)
; x between 0-19
; y between 0-12
; yx - 16-bit value, low byte x, high byte y
(code1:append :screeny-lookup [:bytes "\0\040\080"])
(vm:def :tile>screen ; yx -- p
[:lda vm.TOPH :x] ; a=y
[:lsr :a] [:lsr :a] ; a=y/4
[:tay] ; y=y/4
[:lda 0x03]
[:and vm.TOPH :x] ; a=y%4
[:ora 0x20] ; a=0x20 + y%4
[:sta vm.TOPH :x] ; high byte is set (and y is wiped)
[:lda vm.TOP :x] ; a=x
[:asl :a] ; a = x*2
[:clc]
[:adc :screeny-lookup :y] ; a=x*2 + (y/4)*0x28
[:sta vm.TOP :x] ; low byte is set
)
; note: the graphical tile data must not cross a page boundary!
; TODO: add support to the assembler for enforcing that
(fn draw-block []
[:block
[:clc]
[:ldy 8]
:loop
[:lda [vm.TOP :x]]
[:sta [vm.ST1 :x]]
[:inc vm.TOP :x]
[:lda vm.ST1H :x]
[:adc 4]
[:sta vm.ST1H :x]
[:dey]
[:bne :loop]])
(fn draw-vertical-block []
[:block
(draw-block)
[:lda vm.ST1H :x]
[:sbc 31] ; with carry clear this is 32
[:sta vm.ST1H :x]
[:lda vm.ST1 :x]
[:ora 0x80]
[:sta vm.ST1 :x]
(draw-block)])
(vm:def :drawtile ; p gfx --
(draw-vertical-block)
[:lda vm.ST1H :x]
[:sbc 31]
[:sta vm.ST1H :x]
[:lda vm.ST1 :x]
[:sbc 0x7f]
[:sta vm.ST1 :x]
(draw-vertical-block)
(vm:drop) (vm:drop))
(vm:def :cleargfx
(vm:push 0x4000)
[:block :page
[:dec vm.TOPH :x]
[:lda 0]
[:block :start
[:sta [vm.TOP :x]]
[:inc vm.TOP :x]
[:bne :start]]
[:lda vm.TOPH :x]
[:cmp 0x20]
[:bne :page]]
(vm:drop))
(vm:word :drawmaprow ; pscreen pmap -- pmap
20 (vm:for
:2dup :bget :lookup-tile :drawtile
:inc :swap :inc :inc :swap) :swap :drop)
(vm:word :drawmap
:lit :map 0x0c00 (vm:until 0x100 :-
:dup :tile>screen ; pmap yx pscreen
:<rot :drawmaprow :swap ; pmap yx
:dup :not) :drop :drop)
(vm:def :lookup-tile ; itile -- ptile
; each tile is 32 bytes; 2^5
; we save some cycles by storing the indices as lllhhhhh, so we don't need to shift them'
[:lda vm.TOP :x] [:tay]
[:and 0x1f]
[:clc] [:adc #(hi tiles.org)]
[:sta vm.TOPH :x]
[:tya] [:and 0xe0]
[:sta vm.TOP :x])
(tiles:append :blanktile [:bytes "\0\0\0\0\0\0\0\0\0\255\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \0\0\0\0\0\0"])
(tiles:append :testtile [:bytes "12345678901234567890123456789012"])
(tiles:append [:bytes "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"])
;; 19x11 means full map is 209 bytes
(: (prg:org 0x6800) :append :map [:bytes (string.rep "\0\032\064" 85)])
(code1:append :main
[:jsr :reset]
[:jsr :interpret]
[:vm :mixed-hires
:cleargfx :drawmap
:quit])
(prg:assemble)

479
test.fnl
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@ -1,479 +0,0 @@
(local lume (require "lume"))
(local {: program : dat-parser : new-block : parse-dats : lo : hi} (require "asm"))
(local {: stream : kvstream : one} (require "stream"))
(local prg (program))
(local code1 (prg:org 0xc00))
(local tiles (prg:org 0x6100))
(prg:debug-to "test.dbg")
(fn dat-parser.vm [bytecodes]
(local block (new-block))
(each [_ bytecode (ipairs (lume.slice bytecodes 2))]
(if
(= (type bytecode) :number)
(parse-dats block [[:ref :lit] [:dw bytecode]])
(= (type bytecode) :string)
(parse-dats block [[:ref bytecode]])
(= (type bytecode) :table)
(parse-dats block [bytecode])
(error (.. "VM can't parse " (fv bytecode)))))
block)
(local mon {
:hexout :0xfdda
:putchar :0xfded
:bell :0xff3a
})
(local vm {
:IP :0x60
:IPH :0x61
:W :0x62
:WH :0x63
:ROFF :0x64
:TOP :0x80
:TOPH :0x81
:ST1 :0x7e
:ST1H :0x7f
:ST2 :0x7c
:ST2H :0x7d
:RSTACK :0x6000
:ret (fn [self] [:jmp :next])
:reserve (fn [self] [:block [:inx] [:inx]])
:push
(fn [self v]
(local l (bit.band v 0xff))
(local h (bit.band (bit.rshift v 8) 0xff))
[:block (self:reserve)
[:lda l]
[:sta self.TOP :x]
[:lda h]
[:sta self.TOPH :x]
])
:drop (fn [self] [:block [:dex] [:dex]])
:def
(fn [self name ...]
(code1:append name [:flatten ...] (self:ret)))
:word
(fn [self name ...]
(code1:append name [:jsr :subroutine] [:vm ...] [:vm :ret]))
:inline
(fn [self ...]
[:block [:jsr :subroutine] [:vm ...] [:vm :restore]])
:asm
(fn [self ...]
[:block [:vm :native] [:block ...] [:jsr :interpret]])
})
(fn inc16 [l h]
[:block
[:inc l]
[:bne :done]
[:inc h]
:done
])
(fn dec16 [l h]
[:block
[:lda l]
[:bne :declow]
[:dec h]
:declow
[:dec l]])
(fn add16 [l h]
[:block
[:clc]
[:adc l]
[:sta l]
[:bcc :go]
[:inc h]
:go
])
(fn inc16-stk [l h]
[:block
[:inc l :x]
[:bne :done]
[:inc h :x]
:done])
(fn achar [c] (bit.bor (string.byte c) 0x80))
(fn astr [s]
(-> [(string.byte s 1 -1)]
(lume.map #(bit.bor $1 0x80))
(-> (table.unpack) (string.char))))
(code1:append :next
[:ldy 0]
[:lda [vm.IP] :y] [:sta vm.W]
(inc16 vm.IP vm.IPH)
[:lda [vm.IP] :y] [:sta vm.WH]
(inc16 vm.IP vm.IPH)
; [:lda vm.WH]
; [:jsr mon.hexout]
; [:lda vm.W]
; [:jsr mon.hexout]
; [:lda (achar " ")]
; [:jsr mon.putchar]
[:jmp [vm.W]])
(code1:append :reset
[:lda #(lo ($1:lookup-addr :quit))]
[:sta vm.IP]
[:lda #(hi ($1:lookup-addr :quit))]
[:sta vm.IPH]
[:lda 0]
[:sta vm.ROFF]
[:ldx 0xfe]
[:rts])
(vm:def
:subroutine ; usage: [jsr :subroutine] followed by bytecode
[:ldy vm.ROFF]
[:lda vm.IP] [:sta vm.RSTACK :y] [:iny]
[:lda vm.IPH] [:sta vm.RSTACK :y] [:iny]
[:sty vm.ROFF]
:interpret ; usage: [jsr :interpret] followed by bytecode
[:pla] [:sta vm.IP] [:pla] [:sta vm.IPH]
(inc16 vm.IP vm.IPH))
(vm:def :ret
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IPH]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IP]
[:sty vm.ROFF])
(code1:append :native [:jmp [vm.IP]])
(code1:append :quit [:rts])
(code1:append :restore
[:lda vm.IP] [:sta vm.W]
[:lda vm.IPH] [:sta vm.WH]
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IPH]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IP]
[:sty vm.ROFF]
[:jmp [vm.W]])
(vm:def :mixed-hires
[:sta :0xc050]
[:sta :0xc057]
[:sta :0xc052])
(vm:def :drop (vm:drop))
(vm:def :dup
(vm:reserve)
[:lda vm.ST1H :x]
[:sta vm.TOPH :x]
[:lda vm.ST1 :x]
[:sta vm.TOP :x])
(vm:def :swap
[:lda vm.TOP :x]
[:ldy vm.ST1 :x]
[:sty vm.TOP :x]
[:sta vm.ST1 :x]
[:lda vm.TOPH :x]
[:ldy vm.ST1H :x]
[:sty vm.TOPH :x]
[:sta vm.ST1H :x])
(vm:def :over
(vm:reserve)
[:lda vm.ST2H :x]
[:sta vm.TOPH :x]
[:lda vm.ST2 :x]
[:sta vm.TOP :x])
(vm:word :2dup :over :over)
(vm:def :>rot ; (a b c -- c a b)
[:lda vm.TOP :x] ; a: c (a b c)
[:ldy vm.ST2 :x] ; y: a (a b c)
[:sta vm.ST2 :x] ; a: c (c b c)
[:lda vm.ST1 :x] ; a: b (c b c)
[:sta vm.TOP :x] ; a: b (c b b)
[:sty vm.ST1 :x] ; y: a (c a b)
[:lda vm.TOPH :x] ; a: c (a b c)
[:ldy vm.ST2H :x] ; y: a (a b c)
[:sta vm.ST2H :x] ; a: c (c b c)
[:lda vm.ST1H :x] ; a: b (c b c)
[:sta vm.TOPH :x] ; a: b (c b b)
[:sty vm.ST1H :x] ; y: a (c a b)
)
(vm:def :<rot ; (a b c -- b c a)
[:lda vm.TOP :x] ; a: c (a b c)
[:ldy vm.ST1 :x] ; y: b (a b c)
[:sta vm.ST1 :x] ; a: c (a c c)
[:lda vm.ST2 :x] ; a: a (a c c)
[:sta vm.TOP :x] ; a: a (a c a)
[:sty vm.ST2 :x] ; y: b (b c a)
[:lda vm.TOPH :x] ; a: c (a b c)
[:ldy vm.ST1H :x] ; y: b (a b c)
[:sta vm.ST1H :x] ; a: c (a c c)
[:lda vm.ST2H :x] ; a: a (a c c)
[:sta vm.TOPH :x] ; a: a (a c a)
[:sty vm.ST2H :x] ; y: b (b c a)
)
(vm:def :get
[:lda [vm.TOP :x]]
[:tay]
(inc16-stk vm.TOP vm.TOPH)
[:lda [vm.TOP :x]]
[:sta vm.TOPH :x]
[:sty vm.TOP :x])
(vm:def :set ; v p --
[:lda vm.ST1 :x]
[:sta [vm.TOP :x]]
(inc16-stk vm.TOP vm.TOPH)
[:lda vm.ST1H :x]
[:sta [vm.TOP :x]]
(vm:drop) (vm:drop))
(vm:def :bget ; p -- b
[:lda [vm.TOP :x]] [:sta vm.TOP :x]
[:lda 0] [:sta vm.TOPH :x])
(vm:def :bset ; b p --
[:lda vm.ST1 :x] [:sta [vm.TOP :x]]
(vm:drop) (vm:drop))
(vm:def :lit
(vm:reserve) [:ldy 0]
[:lda [vm.IP] :y] [:sta vm.TOP :x]
(inc16 vm.IP vm.IPH)
[:lda [vm.IP] :y] [:sta vm.TOPH :x]
(inc16 vm.IP vm.IPH))
(vm:def :>r ; v --
[:ldy vm.ROFF]
[:lda vm.TOP :x] [:sta vm.RSTACK :y] [:iny]
[:lda vm.TOPH :x] [:sta vm.RSTACK :y] [:iny]
[:sty vm.ROFF]
(vm:drop))
(vm:def :r> ; -- v
(vm:reserve)
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOPH :x]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOP :x]
[:sty vm.ROFF])
(vm:def :rtop ; -- v
(vm:reserve)
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOPH :x]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOP :x])
(vm:def :rdrop
[:ldy vm.ROFF] [:dey] [:dey] [:sty vm.ROFF])
(vm:def :bz ; f --
[:block
[:lda vm.TOP :x]
[:bne :skip]
[:lda vm.TOPH :x]
[:beq :dojmp]
:skip
(vm:drop)
[:lda 2] (add16 vm.IP vm.IPH) (vm:ret)
:dojmp (vm:drop)]
:jmp
; ugh I don't have enough registers for this; a (one-byte?) relative jump would maybe be better
[:ldy 0] [:lda [vm.IP] :y] [:sta vm.W]
[:iny] [:lda [vm.IP] :y] [:sta vm.IPH]
[:lda vm.W] [:sta vm.IP])
(fn vm.while [self preamble ...]
[:block
:start
[:vm (table.unpack preamble)]
[:ref :bz] [:ref :end]
[:vm ...]
[:ref :jmp] [:ref :start]
:end])
(fn vm.until [self ...]
[:block :start [:vm ...] [:ref :bz] [:ref :start]])
(fn vm.for [self ...]
[:vm :>r (vm:while [:rtop] [:vm ...] :r> :dec :>r) :rdrop])
(vm:def :+ ; a b -- c
[:clc]
[:lda vm.ST1 :x] [:adc vm.TOP :x] [:sta vm.ST1 :x]
[:lda vm.ST1H :x] [:adc vm.TOPH :x] [:sta vm.ST1H :x]
(vm:drop))
(vm:def :- ; a b -- c
[:sec]
[:lda vm.ST1 :x] [:sbc vm.TOP :x] [:sta vm.ST1 :x]
[:lda vm.ST1H :x] [:sbc vm.TOPH :x] [:sta vm.ST1H :x]
(vm:drop))
(vm:def :inc ; a -- a+1
(inc16-stk vm.TOP vm.TOPH))
(vm:def :dec ; a -- a-1
[:block
[:lda vm.TOP :x]
[:bne :declow]
[:dec vm.TOPH :x]
:declow
[:dec vm.TOP :x]])
(vm:def :not ; f - !f
[:block
[:lda vm.TOP :x]
[:bne :zero]
[:lda vm.TOPH :x]
[:bne :zero]
[:lda 0xff] [:sta vm.TOP :x] [:sta vm.TOPH :x] (vm:ret)
:zero
[:lda 0] [:sta vm.TOP :x] [:sta vm.TOPH :x]])
(vm:def := ; a b -- f
[:block
[:lda vm.ST1 :x]
[:cmp vm.TOP :x]
[:bne :noteq]
[:lda vm.ST1H :x]
[:cmp vm.TOP :x]
[:bne :noteq]
[:lda 0xff] (vm:drop) [:sta vm.TOP :x] [:sta vm.TOPH :x] (vm:ret)
:noteq
[:lda 0] (vm:drop) [:sta vm.TOP :x] [:sta vm.TOPH :x]])
(vm:def :.
[:lda vm.TOPH :x]
[:jsr mon.hexout]
[:lda vm.TOP :x]
[:jsr mon.hexout]
[:lda (achar " ")]
[:jsr mon.putchar]
(vm:drop))
(vm:def :stacklen
(vm:reserve)
[:txa] [:lsr :a] [:sta vm.TOP :x]
[:lda 0] [:sta vm.TOPH :x])
(vm:word :.s
:stacklen (prg:parse-addr vm.TOP) :swap
(vm:for :dup :get :. :inc :inc) :drop)
; starting address:
; 0x2000 + (x*2) + (y%4 * 0x100) + ((y/4) * 0x28)
; x between 0-19
; y between 0-12
; yx - 16-bit value, low byte x, high byte y
(code1:append :screeny-lookup [:bytes "\0\040\080"])
(vm:def :tile>screen ; yx -- p
[:lda vm.TOPH :x] ; a=y
[:lsr :a] [:lsr :a] ; a=y/4
[:tay] ; y=y/4
[:lda 0x03]
[:and vm.TOPH :x] ; a=y%4
[:ora 0x20] ; a=0x20 + y%4
[:sta vm.TOPH :x] ; high byte is set (and y is wiped)
[:lda vm.TOP :x] ; a=x
[:asl :a] ; a = x*2
[:clc]
[:adc :screeny-lookup :y] ; a=x*2 + (y/4)*0x28
[:sta vm.TOP :x] ; low byte is set
)
; note: the graphical tile data must not cross a page boundary!
; TODO: add support to the assembler for enforcing that
(fn draw-block []
[:block
[:clc]
[:ldy 8]
:loop
[:lda [vm.TOP :x]]
[:sta [vm.ST1 :x]]
[:inc vm.TOP :x]
[:lda vm.ST1H :x]
[:adc 4]
[:sta vm.ST1H :x]
[:dey]
[:bne :loop]])
(fn draw-vertical-block []
[:block
(draw-block)
[:lda vm.ST1H :x]
[:sbc 31] ; with carry clear this is 32
[:sta vm.ST1H :x]
[:lda vm.ST1 :x]
[:ora 0x80]
[:sta vm.ST1 :x]
(draw-block)])
(vm:def :drawtile ; p gfx --
(draw-vertical-block)
[:lda vm.ST1H :x]
[:sbc 31]
[:sta vm.ST1H :x]
[:lda vm.ST1 :x]
[:sbc 0x7f]
[:sta vm.ST1 :x]
(draw-vertical-block)
(vm:drop) (vm:drop))
(vm:def :cleargfx
(vm:push 0x4000)
[:block :page
[:dec vm.TOPH :x]
[:lda 0]
[:block :start
[:sta [vm.TOP :x]]
[:inc vm.TOP :x]
[:bne :start]]
[:lda vm.TOPH :x]
[:cmp 0x20]
[:bne :page]]
(vm:drop))
(vm:word :drawmaprow ; pscreen pmap -- pmap
20 (vm:for
:2dup :bget :lookup-tile :drawtile
:inc :swap :inc :inc :swap) :swap :drop)
(vm:word :drawmap
:lit :map 0x0c00 (vm:until 0x100 :-
:dup :tile>screen ; pmap yx pscreen
:<rot :drawmaprow :swap ; pmap yx
:dup :not) :drop :drop)
(vm:def :lookup-tile ; itile -- ptile
; each tile is 32 bytes; 2^5
; we save some cycles by storing the indices as lllhhhhh, so we don't need to shift them'
[:lda vm.TOP :x] [:tay]
[:and 0x1f]
[:clc] [:adc #(hi tiles.org)]
[:sta vm.TOPH :x]
[:tya] [:and 0xe0]
[:sta vm.TOP :x])
(tiles:append :blanktile [:bytes "\0\0\0\0\0\0\0\0\0\255\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0 \0\0\0\0\0\0"])
(tiles:append :testtile [:bytes "12345678901234567890123456789012"])
(tiles:append [:bytes "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"])
;; 19x11 means full map is 209 bytes
(: (prg:org 0x6800) :append :map [:bytes (string.rep "\0\032\064" 85)])
(code1:append :main
[:jsr :reset]
[:jsr :interpret]
[:vm :mixed-hires
:cleargfx :drawmap
:quit])
(prg:assemble)
prg

View file

@ -1,9 +1,40 @@
(fn table.clone [tbl]
(let [newtbl {}]
(each [k v (pairs tbl)]
(tset newtbl k v))
newtbl))
(local lume (require "lume"))
(fn string.fromhex [str]
(str:gsub ".." (fn [cc] (string.char (tonumber cc 16)))))
(fn string.tohex [str]
(str:gsub "." (fn [c] (string.format "%02X" (string.byte c)))))
(fn lo [v] (bit.band v 0xff))
(fn hi [v] (bit.band (bit.rshift v 8) 0xff))
(fn int8-to-bytes [i]
(string.char (lo i)))
(fn int16-to-bytes [i]
(string.char (lo i) (hi i)))
(fn reload [modname]
(tset package.loaded modname nil)
(require modname))
; lume.hotswap really assumes your module is a table
(fn hotswap [modname]
(if (= (type (. package.loaded modname)) :table)
(lume.hotswap modname)
(reload modname)))
(fn mk-swappable-fn [table k]
(fn [...] ((. table k) ...)))
(fn swappable [table]
(local s {})
(each [k v (pairs table)]
(if (= (type v) :function)
(tset s k (mk-swappable-fn table k))
(tset s k v)))
s)
(fn swappable-require [modname]
(swappable (require modname)))
{: lo : hi : int8-to-bytes : int16-to-bytes : reload : hotswap : swappable :require swappable-require}

337
vm.fnl Normal file
View file

@ -0,0 +1,337 @@
(local lume (require "lume"))
(local {: lo : hi} (require "util"))
(fn inc16-stk [l h]
[:block
[:inc l :x]
[:bne :done]
[:inc h :x]
:done])
(fn inc16 [l h]
[:block
[:inc l]
[:bne :done]
[:inc h]
:done
])
(fn dec16 [l h]
[:block
[:lda l]
[:bne :declow]
[:dec h]
:declow
[:dec l]])
(fn add16 [l h]
[:block
[:clc]
[:adc l]
[:sta l]
[:bcc :go]
[:inc h]
:go
])
(fn mk-vm [prg options]
(local code1 (prg:org 0xc00))
(fn prg.dat-parser.vm [bytecodes]
(local block (prg:new-block))
(each [_ bytecode (ipairs (lume.slice bytecodes 2))]
(if
(= (type bytecode) :number)
(prg:parse-dats block [[:ref :lit] [:dw bytecode]])
(= (type bytecode) :string)
(prg:parse-dats block [[:ref bytecode]])
(= (type bytecode) :table)
(prg:parse-dats block [bytecode])
(error (.. "VM can't parse " (fv bytecode)))))
block)
(local vm {
:IP :0x60
:IPH :0x61
:W :0x62
:WH :0x63
:ROFF :0x64
:TOP :0x80
:TOPH :0x81
:ST1 :0x7e
:ST1H :0x7f
:ST2 :0x7c
:ST2H :0x7d
:RSTACK :0x6000
:code code1
:ret (fn [self] [:jmp :next])
:reserve (fn [self] [:block [:inx] [:inx]])
:push
(fn [self v]
(local l (bit.band v 0xff))
(local h (bit.band (bit.rshift v 8) 0xff))
[:block (self:reserve)
[:lda l]
[:sta self.TOP :x]
[:lda h]
[:sta self.TOPH :x]
])
:drop (fn [self] [:block [:dex] [:dex]])
:def
(fn [self name ...]
(code1:append name [:flatten ...] (self:ret)))
:word
(fn [self name ...]
(code1:append name [:jsr :subroutine] [:vm ...] [:vm :ret]))
:inline
(fn [self ...]
[:block [:jsr :subroutine] [:vm ...] [:vm :restore]])
:asm
(fn [self ...]
[:block [:vm :native] [:block ...] [:jsr :interpret]])
})
(code1:append :next
[:ldy 0]
[:lda [vm.IP] :y] [:sta vm.W]
(inc16 vm.IP vm.IPH)
[:lda [vm.IP] :y] [:sta vm.WH]
(inc16 vm.IP vm.IPH)
; [:lda vm.WH]
; [:jsr mon.hexout]
; [:lda vm.W]
; [:jsr mon.hexout]
; [:lda (achar " ")]
; [:jsr mon.putchar]
[:jmp [vm.W]])
(code1:append :reset
[:lda #(lo ($1:lookup-addr :quit))]
[:sta vm.IP]
[:lda #(hi ($1:lookup-addr :quit))]
[:sta vm.IPH]
[:lda 0]
[:sta vm.ROFF]
[:ldx 0xfe]
[:rts])
(vm:def
:subroutine ; usage: [jsr :subroutine] followed by bytecode
[:ldy vm.ROFF]
[:lda vm.IP] [:sta vm.RSTACK :y] [:iny]
[:lda vm.IPH] [:sta vm.RSTACK :y] [:iny]
[:sty vm.ROFF]
:interpret ; usage: [jsr :interpret] followed by bytecode
[:pla] [:sta vm.IP] [:pla] [:sta vm.IPH]
(inc16 vm.IP vm.IPH))
(vm:def :ret
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IPH]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IP]
[:sty vm.ROFF])
(code1:append :native [:jmp [vm.IP]])
(code1:append :quit [:rts])
(code1:append :restore
[:lda vm.IP] [:sta vm.W]
[:lda vm.IPH] [:sta vm.WH]
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IPH]
[:dey] [:lda vm.RSTACK :y] [:sta vm.IP]
[:sty vm.ROFF]
[:jmp [vm.W]])
(vm:def :drop (vm:drop))
(vm:def :dup
(vm:reserve)
[:lda vm.ST1H :x]
[:sta vm.TOPH :x]
[:lda vm.ST1 :x]
[:sta vm.TOP :x])
(vm:def :swap
[:lda vm.TOP :x]
[:ldy vm.ST1 :x]
[:sty vm.TOP :x]
[:sta vm.ST1 :x]
[:lda vm.TOPH :x]
[:ldy vm.ST1H :x]
[:sty vm.TOPH :x]
[:sta vm.ST1H :x])
(vm:def :over
(vm:reserve)
[:lda vm.ST2H :x]
[:sta vm.TOPH :x]
[:lda vm.ST2 :x]
[:sta vm.TOP :x])
(vm:word :2dup :over :over)
(vm:def :>rot ; (a b c -- c a b)
[:lda vm.TOP :x] ; a: c (a b c)
[:ldy vm.ST2 :x] ; y: a (a b c)
[:sta vm.ST2 :x] ; a: c (c b c)
[:lda vm.ST1 :x] ; a: b (c b c)
[:sta vm.TOP :x] ; a: b (c b b)
[:sty vm.ST1 :x] ; y: a (c a b)
[:lda vm.TOPH :x] ; a: c (a b c)
[:ldy vm.ST2H :x] ; y: a (a b c)
[:sta vm.ST2H :x] ; a: c (c b c)
[:lda vm.ST1H :x] ; a: b (c b c)
[:sta vm.TOPH :x] ; a: b (c b b)
[:sty vm.ST1H :x] ; y: a (c a b)
)
(vm:def :<rot ; (a b c -- b c a)
[:lda vm.TOP :x] ; a: c (a b c)
[:ldy vm.ST1 :x] ; y: b (a b c)
[:sta vm.ST1 :x] ; a: c (a c c)
[:lda vm.ST2 :x] ; a: a (a c c)
[:sta vm.TOP :x] ; a: a (a c a)
[:sty vm.ST2 :x] ; y: b (b c a)
[:lda vm.TOPH :x] ; a: c (a b c)
[:ldy vm.ST1H :x] ; y: b (a b c)
[:sta vm.ST1H :x] ; a: c (a c c)
[:lda vm.ST2H :x] ; a: a (a c c)
[:sta vm.TOPH :x] ; a: a (a c a)
[:sty vm.ST2H :x] ; y: b (b c a)
)
(vm:def :get
[:lda [vm.TOP :x]]
[:tay]
(inc16-stk vm.TOP vm.TOPH)
[:lda [vm.TOP :x]]
[:sta vm.TOPH :x]
[:sty vm.TOP :x])
(vm:def :set ; v p --
[:lda vm.ST1 :x]
[:sta [vm.TOP :x]]
(inc16-stk vm.TOP vm.TOPH)
[:lda vm.ST1H :x]
[:sta [vm.TOP :x]]
(vm:drop) (vm:drop))
(vm:def :bget ; p -- b
[:lda [vm.TOP :x]] [:sta vm.TOP :x]
[:lda 0] [:sta vm.TOPH :x])
(vm:def :bset ; b p --
[:lda vm.ST1 :x] [:sta [vm.TOP :x]]
(vm:drop) (vm:drop))
(vm:def :lit
(vm:reserve) [:ldy 0]
[:lda [vm.IP] :y] [:sta vm.TOP :x]
(inc16 vm.IP vm.IPH)
[:lda [vm.IP] :y] [:sta vm.TOPH :x]
(inc16 vm.IP vm.IPH))
(vm:def :>r ; v --
[:ldy vm.ROFF]
[:lda vm.TOP :x] [:sta vm.RSTACK :y] [:iny]
[:lda vm.TOPH :x] [:sta vm.RSTACK :y] [:iny]
[:sty vm.ROFF]
(vm:drop))
(vm:def :r> ; -- v
(vm:reserve)
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOPH :x]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOP :x]
[:sty vm.ROFF])
(vm:def :rtop ; -- v
(vm:reserve)
[:ldy vm.ROFF]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOPH :x]
[:dey] [:lda vm.RSTACK :y] [:sta vm.TOP :x])
(vm:def :rdrop
[:ldy vm.ROFF] [:dey] [:dey] [:sty vm.ROFF])
(vm:def :bz ; f --
[:block
[:lda vm.TOP :x]
[:bne :skip]
[:lda vm.TOPH :x]
[:beq :dojmp]
:skip
(vm:drop)
[:lda 2] (add16 vm.IP vm.IPH) (vm:ret)
:dojmp (vm:drop)]
:jmp
; ugh I don't have enough registers for this; a (one-byte?) relative jump would maybe be better
[:ldy 0] [:lda [vm.IP] :y] [:sta vm.W]
[:iny] [:lda [vm.IP] :y] [:sta vm.IPH]
[:lda vm.W] [:sta vm.IP])
(fn vm.while [self preamble ...]
[:block
:start
[:vm (table.unpack preamble)]
[:ref :bz] [:ref :end]
[:vm ...]
[:ref :jmp] [:ref :start]
:end])
(fn vm.until [self ...]
[:block :start [:vm ...] [:ref :bz] [:ref :start]])
(fn vm.for [self ...]
[:vm :>r (vm:while [:rtop] :r> :dec :>r ...) :rdrop])
(vm:def :+ ; a b -- c
[:clc]
[:lda vm.ST1 :x] [:adc vm.TOP :x] [:sta vm.ST1 :x]
[:lda vm.ST1H :x] [:adc vm.TOPH :x] [:sta vm.ST1H :x]
(vm:drop))
(vm:def :- ; a b -- c
[:sec]
[:lda vm.ST1 :x] [:sbc vm.TOP :x] [:sta vm.ST1 :x]
[:lda vm.ST1H :x] [:sbc vm.TOPH :x] [:sta vm.ST1H :x]
(vm:drop))
(vm:def :inc ; a -- a+1
(inc16-stk vm.TOP vm.TOPH))
(vm:def :dec ; a -- a-1
[:block
[:lda vm.TOP :x]
[:bne :declow]
[:dec vm.TOPH :x]
:declow
[:dec vm.TOP :x]])
(vm:def :not ; f - !f
[:block
[:lda vm.TOP :x]
[:bne :zero]
[:lda vm.TOPH :x]
[:bne :zero]
[:lda 0xff] [:sta vm.TOP :x] [:sta vm.TOPH :x] (vm:ret)
:zero
[:lda 0] [:sta vm.TOP :x] [:sta vm.TOPH :x]])
(vm:def := ; a b -- f
[:block
[:lda vm.ST1 :x]
[:cmp vm.TOP :x]
[:bne :noteq]
[:lda vm.ST1H :x]
[:cmp vm.TOP :x]
[:bne :noteq]
[:lda 0xff] (vm:drop) [:sta vm.TOP :x] [:sta vm.TOPH :x] (vm:ret)
:noteq
[:lda 0] (vm:drop) [:sta vm.TOP :x] [:sta vm.TOPH :x]])
vm)
{:new mk-vm}

View file

@ -1,5 +1,5 @@
(require "lite")
(require "util")
(local util (require "util"))
(local lume (require "lume"))
(local imgui (require "imgui"))
(local serial (require "serial"))
@ -19,12 +19,12 @@
})
(command.add #(machine:connected?) {
"honeylisp:upload" (fn []
(local p (reload "test"))
(local p (util.reload "neut"))
(p:upload machine)
(core.log (string.format "%x" (p:lookup-addr p.start-symbol))))
})
(command.add (fn [] true) {
"honeylisp:rebuild" #(reload "test")
"honeylisp:rebuild" #(util.reload "neut")
})
(fn selected-symbol []
@ -52,11 +52,11 @@
(: :gsub "^data%." "")
(: :gsub "%.init$" "")))
(core.log (.. "Hotswapping " modname))
(local (mod err) (lume.hotswap modname))
(local (mod err) (util.hotswap modname))
(when (not= err nil) (print err) (error err)))
"honeylisp:address" (fn []
(local word (selected-symbol))
(local p (require "test"))
(local p (require "neut"))
(core.log (string.format "%s %x" word (or (p:lookup-addr word) -1)))
)
})