source/src/vm/mc6850.h

   1 /*
   2         Skelton for retropc emulator
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2017.05.09-
   6
   7         [ MC6850 ]
   8 */
   9
  10 #ifndef _MC6850_H_
  11 #define _MC6850_H_
  12
  13 //#include "vm.h"
  14 //#include "../emu.h"
  15 #include "device.h"
  16
  17 #define SIG_MC6850_RECV         0
  18 #define SIG_MC6850_DCD          1
  19 #define SIG_MC6850_CTS          2
  20 #define SIG_MC6850_CLEAR        3
  21
  22 class FIFO;
  23
  24 class MC6850 : public DEVICE
  25 {
  26 private:
  27         uint8_t recv, status, ctrl;
  28
  29         outputs_t outputs_out;
  30         outputs_t outputs_rts;
  31         outputs_t outputs_irq;
  32
  33         FIFO *recv_buffer;
  34         FIFO *send_buffer;
  35         int recv_id, send_id;
  36
  37         void update_irq();
  38
  39 public:
  40         MC6850(VM_TEMPLATE* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
  41         {
  42                 initialize_output_signals(&outputs_out);
  43                 initialize_output_signals(&outputs_rts);
  44                 initialize_output_signals(&outputs_irq);
  45                 set_device_name(_T("MC6850 ACIA"));
  46         }
  47         ~MC6850() {}
  48
  49         // common functions
  50         void initialize();
  51         void release();
  52         void reset();
  53         void write_io8(uint32_t addr, uint32_t data);
  54         uint32_t read_io8(uint32_t addr);
  55         void write_signal(int id, uint32_t data, uint32_t mask);
  56         void event_callback(int event_id, int err);
  57         void decl_state();
  58         void save_state(FILEIO* state_fio);
  59         bool load_state(FILEIO* state_fio);
  60
  61         // unique functions
  62         void set_context_out(DEVICE* device, int id)
  63         {
  64                 register_output_signal(&outputs_out, device, id, 0xff);
  65         }
  66         void set_context_rts(DEVICE* device, int id, uint32_t mask)
  67         {
  68                 register_output_signal(&outputs_rts, device, id, mask);
  69         }
  70         void set_context_irq(DEVICE* device, int id, uint32_t mask)
  71         {
  72                 register_output_signal(&outputs_irq, device, id, mask);
  73         }
  74 };
  75
  76 #endif
  77