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Added more VCS mapper stubs.
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g012
parent
3d2dc97870
commit
f0dcdfeaa7
16
6502.lua
16
6502.lua
@ -223,11 +223,12 @@ M.genbin = function(filler)
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local ins,mov = table.insert,table.move
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table.sort(locations, function(a,b) return a.start < b.start end)
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local of0 = locations[1].start
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local fill
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for _,location in ipairs(locations) do
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if location.start < #bin then
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error(string.format("location [%04x,%04x] overlaps another", location.start, location.finish))
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end
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for i=#bin+of0,location.start-1 do ins(bin, filler) end
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if fill then for i=#bin+of0,location.start-1 do ins(bin, filler) end end
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M.size=0 M.cycles=0
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local sections = location.sections
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table.sort(sections, function(a,b) return a.org < b.org end)
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@ -242,7 +243,8 @@ M.genbin = function(filler)
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M.size=#bin M.cycles=M.cycles+(instruction.cycles or 0)
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end
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end
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if location.finish then
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fill = not location.nofill
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if location.finish and fill then
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for i=#bin+of0,location.finish do ins(bin, filler) end
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end
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end
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@ -302,8 +304,10 @@ stats.__tostring = function()
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end
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M.location = function(start, finish)
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local location = { type='location', start=start, finish=finish, sections={} }
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if type(start) == 'table' then
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local location
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if type(start) ~= 'table' then
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location = { type='location', start=start, finish=finish }
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else
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if start.type == 'location' then
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for _,v in ipairs(locations) do if v == start then
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M.location_current = start
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@ -311,15 +315,15 @@ M.location = function(start, finish)
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end end
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error("unable to find reference to location [" .. (start.start or '?') .. ", " .. (start.finish or '?') .. "]")
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end
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location = start
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location.start = start[1]
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location.finish = start[2]
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location.name = start.name
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location.rorg = start.rorg
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if type(location.rorg) == 'number' then
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local offset = location.rorg - location.start
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location.rorg = function(x) return x+offset end
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end
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end
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location.sections = {}
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if not location.rorg then location.rorg = function(x) return x end end
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local size = (location.finish or math.huge) - location.start + 1
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location.chunks={ { start=location.start, size=size } }
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115
vcs.lua
115
vcs.lua
@ -85,18 +85,119 @@ do
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end
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--[[ TODO enable this when lua load() is changed
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function bank_stubs(count, hotspot)
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function switchbank(i) bit 0x1000+hotspot+i end
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mappers = {}
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mappers['2K'] = function()
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rom0 = location(0xf800, 0xffff)
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section{"vectors", org=0xfffc} word(main,main)
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end
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mappers.CV = mappers['2K']
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mappers['4K'] = function()
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rom0 = location(0xf000, 0xffff)
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section{"vectors", org=0xfffc} word(main,main)
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end
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local bank_stubs = function(count, hotspot)
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function switchrom(i) assert(i>=0 and i<count) bit 0x1000+hotspot+i end
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local base = 0x10000 - (count << 12)
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for bi=0,count-1 do
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local o = base+(bi<<12)
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_ENV['bank' .. bi] = location{o, o+0xfff, rorg=0xf000}
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local start=section{"entry"..bi, org=o+hotspot-6} switchbank(0) if bi==0 then jmp main end
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_ENV['rom' .. bi] = location{o, o+0xfff, rorg=0xf000}
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local start=section{"entry"..bi, org=o+hotspot-6} switchrom(0) if bi==0 then jmp main end
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section{"switchtab"..bi, org=o+hotspot} for i=1,count do byte(0) end
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section{"vectors"..bi, org=o+0xffc} word(start,start)
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end
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end
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function f8() bank_stubs(2, 0xff8) end
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function f6() bank_stubs(4, 0xff6) end
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function f4() bank_stubs(8, 0xff4) end
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mappers.FA = function() bank_stubs(3, 0xff8) end
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mappers.F8 = function() bank_stubs(2, 0xff8) end
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mappers.F6 = function() bank_stubs(4, 0xff6) end
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mappers.F4 = function() bank_stubs(8, 0xff4) end
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mappers.FE = function()
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rom0 = location(0xd000, 0xdfff)
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section{"vectors0", org=0xdffc} word(main,main)
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location{0xe000, 0xefff, nofill=true}
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rom1 = location(0xf000, 0xffff)
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section{"vectors1", org=0xfffc} word(main,main)
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end
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mappers.E0 = function(map)
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function switchrom0(i) assert(map[i]==0) bit 0x1fe0+i end
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function switchrom1(i) assert(map[i]==1) bit 0x1fe8+i end
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function switchrom2(i) assert(map[i]==2) bit 0x1ff0+i end
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map[7]=3
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for bi=0,7 do
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local o = bi*0x400
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_ENV["rom"..bi] = location{0xe000+o, 0xe3ff+o, rorg=0xf000+map[bi]*0x400}
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end
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section{"switchtab", org=0xffe0} for i=1,8*3 do byte(0) end
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section{"vectors", org=0xfffc} word(main,main)
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end
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-- rom0 refers to the last one in ROM, ie the one always mapped to 0xF800-0xFFFF,
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-- such that changing the rom count does not change its index
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mappers['3F'] = function(count)
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function switchrom(i) assert(i>=0 and i<count-1) lda#i sta 0x3f end
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local symbols=cpu.symbols for k,v in pairs(vcs) do -- remap TIA to 0x40-0x7F
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if v<0x40 then v=v+0x40 vcs[k]=v symbols[k]=v end
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end
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bi=0,count-2 do
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local o = 0x800*bi + 0x10000
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_ENV["rom"..(count-1-bi)] = location{o, 0x7ff+o, rorg=0xf000}
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end
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local o = 0x800 * (count-1) + 0x10000
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rom0 = location{o, 0x7ff+o, rorg=0xf800}
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section{"vectors", org=0xfffc} word(main,main)
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end
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mappers.E7 = function()
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function switchrom(i) assert(i>=0 and i<7) bit 0x1fe0+i end
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function enableram() bit 0x1fe7 end
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function switchram(i) assert(i>=0 and i<4) bit 0x1fe8+i end
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for bi=0,6 do
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local o = bi*0x800
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_ENV['rom' .. bi] = location{o+0xc000, o+0xc7ff, rorg=0xf000}
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end
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rom7 = location{0xf800, 0xffff, rorg=0xf800}
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section{"switchtab", org=0xffe0} for i=1,12 do byte(0) end
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section{"vectors", org=0xfffc} word(main,main)
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end
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mappers.F0 = function()
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function switchrom() lda 0x1ff0 end
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for bi=0,15 do
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local o = bi*0x1000 + 0x1000
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_ENV['rom' .. bi] = location{o, o+0xfff, rorg=0xf000}
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local start=section{"entry"..bi}
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@_loop switchrom() bne _loop
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if bi==0 then jmp main end
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section{"switchtab"..bi, org=o+0xff0} byte(0)
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section{"vectors"..bi, org=o+0xffc} word(start,start)
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end
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end
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local function bank_stubs2 = function(hotspot0, hotspot1)
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function switchrom(i)
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if i==0 then bit hotspot0
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elseif i==1 then bit hotspot1
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else error("invalid rom index: " .. i) end
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end
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local base = 0xe000
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for bi=0,1 do
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local o = base+(bi<<12)
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_ENV['rom' .. bi] = location{o, o+0xfff, rorg=0xf000}
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local start=section{"entry"..bi, org=o+0xffc-6} switchrom(0) if bi==0 then jmp main end
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section{"vectors"..bi, org=o+0xffc} word(start,start)
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end
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end
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mappers.UA = function() bank_stubs2(0x220, 0x240) end
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mappers.['0840'] = function() bank_stubs2(0x800, 0x840) end
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mappers['3E'] = function(rom_count, ram_count)
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mappers['3F'](rom_count)
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function switchram(i) assert(i>=0 and i<ram_count-1) lda#i sta 0x3E end
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end
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]]
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