mirror of
https://github.com/g012/l65.git
synced 2024-11-15 19:09:19 +00:00
101 lines
1.9 KiB
Lua
101 lines
1.9 KiB
Lua
dofile "vcs.lua"
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TIM_OVERSCAN = 50 -- TIM64T, 3200 cycles = ~ 42 scanlines
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TIM_VBLANK = 61 -- TIM64T, 3904 cycles = ~ 51 scanlines
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TIM_KERNEL = 17 -- T1024T, 17408 cycles = ~229 scanlines
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location(0xf000, 0xffff)
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if toto ~= 15 then end
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abc = 13 ~ 0x7
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xyz = 1 << 2
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x:f()
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::lualabel::
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syntax6502_off
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lda = 5 if lda < 6 then print('yep') end
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syntax6502_on
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--@@data samepage byte(1, 2) crosspage byte(3, 4)
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--section{ "toto", align = 256, offset = 16 }
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--section{ "toto", org = 0xf100 }
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section "waitForIntim" --alt short syntax when no other option: @@waitForIntim ?
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-- n_{ a=INTIM } ?
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--lda(INTIM) -- or a=INTIM
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--bne "waitForIntim"
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ldx #0xf0
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ldx #0b1101
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ldy #0xAB - 16 + 0b11011 & 3 | 6 ~ 0xf >> ~3 << 1 // 5
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lda #0xac
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lda #INTIM
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lda 0xbeef
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lda INTIM
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lda.w INTIM
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lda INTIM,x
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lda INTIM,y
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lda (INTIM,x)
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lda (INTIM),y
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asl
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asl INTIM
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asl
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@.toto
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bne "test"
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bne waitForIntim
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bne f()
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bne .toto
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jam asl lsr ldx #16 ldy 0xf0f0
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rts
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--[[
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section "doOverscan"
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sta{WSYNC} -- WSYNC=a
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lda(2) sta{VBLANK} -- a=2 VBLANK=a
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lda(TIM_OVERSCAN) sta{TIM64T} -- a=TIM_OVERSCAN TIM64T=a
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jsr "waitForIntim"
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section "doVBlank"
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lda(0x0e)
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label ".vsyncLoop"
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sta{WSYNC}
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sta{VSYNC}
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lsr()
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bne ".vsyncLoop"
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lda(2)
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sta{VBLANK}
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lda(TIM_VBLANK)
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sta{TIM64T}
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jsr "waitForIntim"
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section "doKernel"
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lda(TIM_KERNEL)
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sta{T1024T}
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jsr "waitForIntim"
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section "start"
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-- clear zeropage
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cld()
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ldx(0)
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txa()
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label ".clearLoop"
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dex()
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tsx()
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pha()
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bne ".clearLoop"
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-- main
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label "mainLoop"
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jsr "doOverscan"
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jsr "doVBlank"
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jsr "doKernel"
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jmp "mainLoop"
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section{ name="vectors", org=0xfffc }
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word{ "start", "start" }
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]]
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