Failed Blargg's dmg_sound.gb

[BartElliott]

What did you do?

./goboy -dmg dmg_sound.gb

What did you expect to see?

Tests passed

What did you see instead?

On the 12th test, goboy crashes:

panic: runtime error: index out of range

goroutine 19 [running]:
github.com/Humpheh/goboy/pkg/cart.(*MBC1).Read(0xc00012d700, 0xc000014000, 0x400000c0000a5400)
        /home/bell/github/goboy/pkg/cart/mbc1.go:30 +0xb7
github.com/Humpheh/goboy/pkg/gb.(*Memory).Read(0xc000116000, 0xc0000b4000, 0x4c000040)
        /home/bell/github/goboy/pkg/gb/memory.go:271 +0x1cf
github.com/Humpheh/goboy/pkg/gb.(*Gameboy).ExecuteOpcode(0xc0000f4000, 0xc0000d0b1a)
        /home/bell/github/goboy/pkg/gb/instructions.go:132 +0xad8
github.com/Humpheh/goboy/pkg/gb.(*Gameboy).ExecuteNextOpcode(0xc0000f4000, 0x0)
        /home/bell/github/goboy/pkg/gb/instructions.go:52 +0x62
github.com/Humpheh/goboy/pkg/gb.(*Gameboy).Update(0xc0000f4000, 0xc0000b1d01)
        /home/bell/github/goboy/pkg/gb/gameboy.go:81 +0x119
main.startGB(0xc0000f4000, 0x76d0a0, 0xc0000a28c0)
        /home/bell/github/goboy/cmd/goboy/main.go:136 +0x237
main.start(0x7ffd676cb33a, 0x2b)
        /home/bell/github/goboy/cmd/goboy/main.go:113 +0x43c
main.main.func1()
        /home/bell/github/goboy/cmd/goboy/main.go:60 +0x33
github.com/faiface/mainthread.Run.func1(0xc0000a2820, 0xc000078240)
        /home/bell/go/pkg/mod/github.com/faiface/[email protected]/mainthread.go:37 +0x27
created by github.com/faiface/mainthread.Run
        /home/bell/go/pkg/mod/github.com/faiface/[email protected]/mainthread.go:36 +0xb1

System details

go version go1.11.2 linux/amd64
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/bell/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/bell/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/lib/go"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/bell/github/goboy/go.mod"
GOROOT/bin/go version: go version go1.11.2 linux/amd64
GOROOT/bin/go tool compile -V: compile version go1.11.2
uname -sr: Linux 4.19.2-arch1-1-ARCH
/usr/lib/libc.so.6: GNU C Library (GNU libc) stable release version 2.28.
gdb --version: GNU gdb (GDB) 8.2