179 lines
3.5 KiB
NASM
179 lines
3.5 KiB
NASM
arch n64.cpu
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endian msb
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include "inc/util.inc"
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include "inc/n64.inc"
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include "inc/64drive.inc"
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include "inc/main.inc"
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include "inc/kernel.inc"
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output "test.z64", create
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fill 1052672 // ROM size
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origin 0
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base 0x80000000
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include "header.asm"
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insert "bin/6102.bin"
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if origin() != 0x1000 {
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error "bad header or bootcode; combined size should be exactly 0x1000"
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}
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include "kernel.asm"
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Main:
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if MAIN_DECOMP_IMAGE {
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DecompImage:
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lui s0, MAIN_BASE
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nop; nop; nop; nop
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mfc0 t0, CP0_Count
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sw t0, MAIN_COUNTS+0(s0)
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// decompress our picture
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la a0, LZ_BAKU + 4
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lw a3, -4(a0) // load uncompressed size from the file itself
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li a1, LZ_BAKU.size - 4
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li a2, VIDEO_C_IMAGE
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jal LzDecomp
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nop
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mfc0 t0, CP0_Count
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nop; nop; nop; nop
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lw t1, MAIN_COUNTS+0x0(s0)
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sw t0, MAIN_COUNTS+0x4(s0)
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subu t1, t0, t1
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sw t1, MAIN_COUNTS+0xC(s0)
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jal PokeDataCache
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nop
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lui a0, MAIN_BASE
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jal MainDumpWrite
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lli a1, 0x20
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}
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Test3D:
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// write the jump to our actual commands
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lui a0, MAIN_BASE
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lui t0, 0xDE01 // jump (no push)
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ori t1, a0, MAIN_DLIST
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sw t0, MAIN_DLIST_JUMPER+0(a0)
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sw t1, MAIN_DLIST_JUMPER+4(a0)
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jal SetupScreen
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nop
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lli s1, 1 // s1: which color buffer we're writing to (1: alt)
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Start3D:
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lui a0, MAIN_BASE
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ori a0, MAIN_DLIST
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jal WriteDList
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or a1, s1, r0
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jal PokeDataCache
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nop
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ClearIntMask()
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// prepare RSP
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lui a0, SP_BASE
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lli t0, SP_INT_ON_BREAK_SET | SP_TASKDONE_CLR | SP_YIELDED_CLR | SP_YIELD_CLR
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sw t0, SP_STATUS(a0)
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SP_HALT_WAIT()
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// set RSP PC to IMEM+$0
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lui a0, SP_PC_BASE
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// only the lowest 12 bits are used, so 00000000 is equivalent to 04001000.
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sw r0, SP_PC(a0)
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lui a0, MAIN_BASE
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jal PushVideoTask
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ori a0, MAIN_SP_TASK
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SP_DMA_WAIT()
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jal LoadRSPBoot
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nop
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SP_DMA_WAIT()
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// clear all flags that would halt RSP (i.e. tell it to run!)
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lui a0, SP_BASE
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lli t0, SP_INT_ON_BREAK_SET | SP_SINGLE_STEP_CLR | SP_BREAK_CLR | SP_HALT_CLR
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sw t0, SP_STATUS(a0)
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SetIntMask()
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MainLoop:
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WriteString(S_SP_Wait)
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SP_HALT_WAIT()
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WriteString(S_VI_Wait)
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// wait on VI too
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-
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lui t0, VI_BASE
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lw t0, VI_V_CURRENT_LINE(t0)
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// until line <= 10
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sltiu t0, 10 + 1
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beqz t0,-
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nop
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WriteString(SNewFrame)
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// swap buffers
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lui a0, VI_BASE
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beqz s1, SwitchToAlt
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nop
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SwitchToMain:
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la t0, VIDEO_C_IMAGE_ALT
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sw t0, VI_ORIGIN(a0)
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j Start3D
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lli s1, 0
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SwitchToAlt:
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la t0, VIDEO_C_IMAGE
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sw t0, VI_ORIGIN(a0)
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j Start3D
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lli s1, 1
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SetupScreen:
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ScreenNTSC(WIDTH, HEIGHT, VIDEO_MODE, VIDEO_C_IMAGE | UNCACHED)
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jr ra
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nop
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MainDumpWrite:
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subiu sp, 0x18
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sw ra, 0x10(sp)
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lui a2, MAIN_BASE
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ori a2, MAIN_XXD
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jal DumpAndWrite // a0,a1 passthru
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lli a3, 0x200
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WriteString(KS_Newline)
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lw ra, 0x10(sp)
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jr ra
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addiu sp, 0x18
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Die:
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j Die
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nop
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KSL(S_SP_Wait, "now waiting on SP")
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KSL(S_VI_Wait, "now waiting on VI")
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KSL(SNewFrame, "next frame")
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if MAIN_DECOMP_IMAGE {
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include "lzss.baku.unsafe.asm"
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align(16); insert LZ_BAKU, "res/Image.baku.lzss"
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}
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include "dlist.asm"
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include "task.asm"
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if pc() > (MAIN_BASE << 16) {
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error "ran out of memory for code and data"
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}
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