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Frozen Fish 1: Amiga
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crt0.s
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1994-02-03
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816b
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51 lines
! C startup code for the Fujitsu SPARClite demo board
.text
.align 8
win_ovf_trap:
sethi %hi(win_ovf), %l3
jmpl %lo(win_ovf)+%l3, %g0
mov %wim, %l0
nop
win_unf_trap:
sethi %hi(win_unf), %l3
jmpl %lo(win_unf)+%l3, %g0
mov %wim, %l0
nop
.globl start
start:
! First, copy prom & trap vectors to sram
set 0x30000000, %l0
set 0xfff8, %l1
copyloop:
ldd [%l1], %l2
std %l2, [%l0 + %l1]
subcc %l1, 8, %l1
bge copyloop
nop
set 0x30000000, %l0
mov %l0, %tbr ! Install the new tbr
set win_ovf_trap, %l1 ! Setup window overflow trap
ldd [%l1], %l2
std %l2, [%l0 + 5 * 16]
ld [%l1 + 8], %l2
st %l2, [%l0 + 5 * 16 + 8]
set win_unf_trap, %l1 ! Setup window underflow trap
ldd [%l1], %l2
std %l2, [%l0 + 6 * 16]
ld [%l1 + 8], %l2
st %l2, [%l0 + 6 * 16 + 8]
set _main, %g1
jmp %g1
nop