diff options
author | 2015-06-10 12:22:17 +0200 | |
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committer | 2015-06-10 12:22:17 +0200 | |
commit | eecc50b48a0306da0f15b69cefe435e0ef1dd73a (patch) | |
tree | 074efe8e96a9b7a74ba0aff83a7eabadc6656a93 /src/emu/cpu/hphybrid/hphybrid.h | |
parent | 7717489f3ed419c5fb1814be5504e07e9c07b83a (diff) |
hp64k: Improved HP Hybrid CPU (still no DMA)
Diffstat (limited to 'src/emu/cpu/hphybrid/hphybrid.h')
-rw-r--r-- | src/emu/cpu/hphybrid/hphybrid.h | 124 |
1 files changed, 63 insertions, 61 deletions
diff --git a/src/emu/cpu/hphybrid/hphybrid.h b/src/emu/cpu/hphybrid/hphybrid.h index a9153580bee..1d24a1cfd14 100644 --- a/src/emu/cpu/hphybrid/hphybrid.h +++ b/src/emu/cpu/hphybrid/hphybrid.h @@ -10,13 +10,11 @@ // discrete implementation of the 1960s into a multi-chip module (hence the "hybrid" name). // This emulator currently supports the 5061-3011 version only. // -// There is very little information around on this processor. // For this emulator I mainly relied on these sources: // - http://www.hp9845.net/ website // - HP manual "Assembly development ROM manual for the HP9845": this is the most precious // and "enabling" resource of all // - US Patent 4,180,854 describing the HP9845 system -// - Some manual for the 2116 processor // - Study of disassembly of firmware of HP64000 system // - A lot of "educated" guessing @@ -40,6 +38,9 @@ #define HP_IOADDR_PA_SHIFT 2 #define HP_IOADDR_IC_SHIFT 0 +// Compose an I/O address from PA & IC +#define HP_MAKE_IOADDR(pa , ic) (((pa) << HP_IOADDR_PA_SHIFT) | ((ic) << HP_IOADDR_IC_SHIFT)) + // Addresses of memory mapped registers #define HP_REG_A_ADDR 0x0000 #define HP_REG_B_ADDR 0x0001 @@ -65,75 +66,76 @@ class hp_hybrid_cpu_device : public cpu_device { public: protected: - hp_hybrid_cpu_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname); - - // device-level overrides - virtual void device_start(); - virtual void device_reset(); - - // device_execute_interface overrides - virtual UINT32 execute_min_cycles() const { return 6; } - virtual UINT32 execute_max_cycles() const { return 25; } - virtual UINT32 execute_input_lines() const { return 2; } - virtual UINT32 execute_default_irq_vector() const { return 0xffff; } - virtual void execute_run(); - virtual void execute_set_input(int inputnum, int state); - - UINT16 execute_one(UINT16 opcode); - UINT16 execute_one_sub(UINT16 opcode); - - // device_memory_interface overrides - virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const { return (spacenum == AS_PROGRAM) ? &m_program_config : ( (spacenum == AS_IO) ? &m_io_config : NULL ); } - - // device_state_interface overrides - void state_string_export(const device_state_entry &entry, std::string &str); + hp_hybrid_cpu_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname); - // device_disasm_interface overrides - virtual UINT32 disasm_min_opcode_bytes() const { return 2; } - virtual UINT32 disasm_max_opcode_bytes() const { return 2; } - virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options); + // device-level overrides + virtual void device_start(); + virtual void device_reset(); + + // device_execute_interface overrides + virtual UINT32 execute_min_cycles() const { return 6; } + virtual UINT32 execute_max_cycles() const { return 25; } + virtual UINT32 execute_input_lines() const { return 2; } + virtual UINT32 execute_default_irq_vector() const { return 0xffff; } + virtual void execute_run(); + virtual void execute_set_input(int inputnum, int state); + + UINT16 execute_one(UINT16 opcode); + UINT16 execute_one_sub(UINT16 opcode); + + // device_memory_interface overrides + virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const { return (spacenum == AS_PROGRAM) ? &m_program_config : ( (spacenum == AS_IO) ? &m_io_config : NULL ); } + + // device_state_interface overrides + void state_string_export(const device_state_entry &entry, std::string &str); - private: - address_space_config m_program_config; - address_space_config m_io_config; + // device_disasm_interface overrides + virtual UINT32 disasm_min_opcode_bytes() const { return 2; } + virtual UINT32 disasm_max_opcode_bytes() const { return 2; } + virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options); + +private: + address_space_config m_program_config; + address_space_config m_io_config; - address_space *m_program; - direct_read_data *m_direct; - address_space *m_io; - int m_icount; + address_space *m_program; + direct_read_data *m_direct; + address_space *m_io; + int m_icount; - // State of processor - UINT16 m_reg_A; // Register A - UINT16 m_reg_B; // Register B - UINT16 m_reg_P; // Register P - UINT16 m_reg_R; // Register R - UINT16 m_reg_C; // Register C - UINT16 m_reg_D; // Register D - UINT16 m_reg_IV; // Register IV - UINT8 m_reg_PA[ HPHYBRID_INT_LVLS + 1 ]; // Stack of register PA (4 bit-long) - UINT16 m_flags; // Flags (carry, overflow, cb, db, int en, dma en, dma dir) - UINT8 m_dmapa; // DMA peripheral address (4 bits) - UINT16 m_dmama; // DMA address - UINT16 m_dmac; // DMA counter - UINT16 m_reg_I; // Instruction register - - UINT16 get_ea(UINT16 opcode); - void do_add(UINT16& addend1 , UINT16 addend2); - UINT16 get_skip_addr(UINT16 opcode , bool condition) const; - UINT16 get_skip_addr_sc(UINT16 opcode , UINT16& v , unsigned n); - void do_pw(UINT16 opcode); + // State of processor + UINT16 m_reg_A; // Register A + UINT16 m_reg_B; // Register B + UINT16 m_reg_P; // Register P + UINT16 m_reg_R; // Register R + UINT16 m_reg_C; // Register C + UINT16 m_reg_D; // Register D + UINT16 m_reg_IV; // Register IV + UINT8 m_reg_PA[ HPHYBRID_INT_LVLS + 1 ]; // Stack of register PA (4 bit-long) + UINT16 m_flags; // Flags (carry, overflow, cb, db, int en, dma en, dma dir) + UINT8 m_dmapa; // DMA peripheral address (4 bits) + UINT16 m_dmama; // DMA address + UINT16 m_dmac; // DMA counter + UINT16 m_reg_I; // Instruction register + + UINT16 get_ea(UINT16 opcode); + void do_add(UINT16& addend1 , UINT16 addend2); + UINT16 get_skip_addr(UINT16 opcode , bool condition) const; + UINT16 get_skip_addr_sc(UINT16 opcode , UINT16& v , unsigned n); + void do_pw(UINT16 opcode); + void check_for_interrupts(void); - UINT16 RM(UINT16 addr); - void WM(UINT16 addr , UINT16 v); - void WMB(UINT32 addr , UINT8 v); - UINT16 RIO(UINT8 pa , UINT8 ic); - void WIO(UINT8 pa , UINT8 ic , UINT16 v); + UINT16 RM(UINT16 addr); + void WM(UINT16 addr , UINT16 v); + void WMB(UINT32 addr , UINT8 v); + UINT16 RIO(UINT8 pa , UINT8 ic); + void WIO(UINT8 pa , UINT8 ic , UINT16 v); }; class hp_5061_3011_cpu_device : public hp_hybrid_cpu_device { public: - hp_5061_3011_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); + hp_5061_3011_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); }; extern const device_type HP_5061_3011; |