Class: MicroCisc::Vm::TermDevice

Inherits:
Device
  • Object
show all
Defined in:
lib/micro_cisc/vm/term_device.rb

Instance Attribute Summary

Attributes inherited from Device

#id

Instance Method Summary collapse

Methods inherited from Device

#bank_index=, #banked?, #devices=, #read_control, #read_mem, #source_halted, #write_control, #write_mem

Constructor Details

#initialize(device_id) ⇒ TermDevice

Returns a new instance of TermDevice.



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# File 'lib/micro_cisc/vm/term_device.rb', line 4

def initialize(device_id)
  super(device_id, 9, 1)
  # Init device specific read/write controls
  @privileged_read = @privileged_read | 0xE0
  @privileged_write = @privileged_write | 0x20
end

Instance Method Details

#handle_control_read(address) ⇒ Object 



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# File 'lib/micro_cisc/vm/term_device.rb', line 15

def handle_control_read(address)
  case(address)
  when 7
    @control_mem[7] = TTY::Screen.width
  when 8
    @control_mem[8] = TTY::Screen.height
  end
end

#handle_control_update(address, value) ⇒ Object 



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# File 'lib/micro_cisc/vm/term_device.rb', line 24

def handle_control_update(address, value)
  if address == 5
    # value is number of bytes to send
    words = (value + 1) / 2
    string = @local_mem[0][0...words].pack("S>*")[0...value]
    $stdout.write(string)
    $stdout.flush
  end
end

#host_device=(device_id) ⇒ Object 



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# File 'lib/micro_cisc/vm/term_device.rb', line 11

def host_device=(device_id)
  @control_mem[2] = device_id
end