Zack Buhman
0ff0aa5346
This still has issues, notably: Despite the first 16kbytes of audio being loaded prior to starting the AICA ARM7 CPU, the GDROM drive returns "busy" for the following ~48kbytes. This in turn causes the AICA to play audio from uninitialized memory. There is also a separate issue where the timing of changing the start address of the audio channel causes a faint popping sound throughout the audio playback. I should do more timing experiments with the GDROM drive, and improve this example to play the audio with fewer artifacts.
66 lines
1.1 KiB
Plaintext
66 lines
1.1 KiB
Plaintext
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
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MEMORY
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{
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ram : ORIGIN = 0x00000000, LENGTH = 0x1f0000
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buffers : ORIGIN = 0x001f0000, LENGTH = 0x10000
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}
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SECTIONS
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{
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. = ORIGIN(ram);
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.text ALIGN(4) : SUBALIGN(4)
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{
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KEEP(*(.text.start))
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*(.text.startup.*)
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*(.text.*)
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*(.text)
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} > ram
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.data ALIGN(4) : SUBALIGN(4)
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{
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*(.data)
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*(.data.*)
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} > ram
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.rodata ALIGN(4) : SUBALIGN(4)
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{
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*(.rodata)
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*(.rodata.*)
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} > ram
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.ctors ALIGN(4) : SUBALIGN(4)
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{
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KEEP(*(.ctors))
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KEEP(*(.ctors.*))
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} > ram
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.bss ALIGN(4) (NOLOAD) : SUBALIGN(4)
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{
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*(.bss)
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*(.bss.*)
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*(COMMON)
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} > ram
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. = ORIGIN(buffers);
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.buffers ALIGN(4) (NOLOAD) : SUBALIGN(4)
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{
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*(.buffers)
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*(.buffers.*)
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} > buffers
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INCLUDE "../../debug.lds"
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INCLUDE "arm.lds"
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}
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__ram_start = ORIGIN(ram);
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__ram_end = ORIGIN(ram) + LENGTH(ram);
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__bss_link_start = ADDR(.bss);
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__bss_link_end = ADDR(.bss) + SIZEOF(.bss);
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__ctors_link_start = ADDR(.ctors);
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__ctors_link_end = ADDR(.ctors) + SIZEOF(.ctors);
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INCLUDE "addresses.lds"
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