mirror of https://github.com/ariejan/i6502.git
43 lines
725 B
Go
43 lines
725 B
Go
package memory
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import (
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"io/ioutil"
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)
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// Rom provies 16kB of Read Only Memory, typcially loaded from file.
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type Rom struct {
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data [0x4000]byte
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}
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func (rom *Rom) Size() int {
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return len(rom.data)
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}
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func (rom *Rom) Read(address uint16) byte {
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return rom.data[address]
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}
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func (rom *Rom) Write(address uint16, value byte) {
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panic("Cannot write to ROM!")
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}
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// Load ROM from a binary file. The data is placed
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// at the beginning of ROM.
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func LoadRomFromFile(path string) (*Rom, error) {
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// Read data from file
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data, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, err
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}
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// Create the rom instance
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rom := &Rom{}
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// Load data into ROM
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for i, b := range data {
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rom.data[i] = b
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}
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return rom, nil
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}
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