diff options
| -rw-r--r-- | eater_cpu/cpp/Veater_computer__main.cpp | 3 | ||||
| -rw-r--r-- | eater_cpu/cpp/simpc_term.cpp | 8 | ||||
| -rw-r--r-- | eater_cpu/eater_decoder.sv | 14 | ||||
| -rw-r--r-- | eater_cpu/eater_types.sv | 6 | ||||
| -rw-r--r-- | eater_cpu/readme.txt | 1 |
5 files changed, 31 insertions, 1 deletions
diff --git a/eater_cpu/cpp/Veater_computer__main.cpp b/eater_cpu/cpp/Veater_computer__main.cpp index c415454..fbfc978 100644 --- a/eater_cpu/cpp/Veater_computer__main.cpp +++ b/eater_cpu/cpp/Veater_computer__main.cpp @@ -24,6 +24,9 @@ void load_program(const std::unique_ptr<Veater_computer> &topp) { 0x2f, // SUB 13 0x3d, + // STA 12 + 0x4c, + // OUT 0xe0, // NOP diff --git a/eater_cpu/cpp/simpc_term.cpp b/eater_cpu/cpp/simpc_term.cpp index c08deed..2ac3895 100644 --- a/eater_cpu/cpp/simpc_term.cpp +++ b/eater_cpu/cpp/simpc_term.cpp @@ -1,4 +1,5 @@ #include "Veater_computer_eater_register.h" +#include "Veater_computer_my_mem__DB10.h" #include "simpc_ui.h" #define NCUR_X 5 @@ -35,7 +36,7 @@ static void handle_key(); void simpc_ui_write(const std::unique_ptr<Veater_computer> &topp, uint64_t i) { // clk hi->lo doesn't do anything, just skip this. - if (i !=0 && !topp->clk_in) + if (i != 0 && !topp->clk_in) return; // uint16_t opcode = topp->eater_computer->; uint8_t opcode = topp->eater_computer->INS->r_datastore; @@ -109,6 +110,11 @@ void simpc_ui_finish_message(const std::unique_ptr<VerilatedContext> &contextp, PRINT_ME_W(status_top, 1, xpos, "%s", msg); attroff(A_BOLD); + + for (int idx = 0; idx < topp->eater_computer->RAM->r_datastore.size(); + idx++) { + printf("Mem[%2d] = 0X%02X\n", idx, topp->eater_computer->RAM->r_datastore[idx]); + } } void simpc_ui_init(void) {} diff --git a/eater_cpu/eater_decoder.sv b/eater_cpu/eater_decoder.sv index ad0fd52..fea00e0 100644 --- a/eater_cpu/eater_decoder.sv +++ b/eater_cpu/eater_decoder.sv @@ -29,6 +29,7 @@ function CpuState insdep_state; LDA: insdep_state = LDA_INS_to_MAR; ADD: insdep_state = ADD_INS_to_MAR; SUB: insdep_state = SUB_INS_to_MAR; + STA: insdep_state = STA_INS_to_MAR; OUT: insdep_state = OUT_A_to_OUT; HALT_op: insdep_state = HALT_st; @@ -61,6 +62,9 @@ always @(posedge clk_i) begin SUB_MEM_to_B: next_state = SUB_ALU_to_A; SUB_ALU_to_A: next_state = PC_to_MAR; + STA_INS_to_MAR: next_state = STA_A_to_MEM; + STA_A_to_MEM: next_state = PC_to_MAR; + OUT_A_to_OUT: next_state = PC_to_MAR; HALT_st: next_state = HALT_st; @@ -139,6 +143,16 @@ always_comb begin internal_flags.A_in = 1; end + STA_INS_to_MAR: begin + internal_flags.INS_out = 1; + internal_flags.MAR_in = 1; + end + + STA_A_to_MEM: begin + internal_flags.RAM_in = 1; + internal_flags.A_out = 1; + end + OUT_A_to_OUT: begin internal_flags.A_out = 1; internal_flags.OUT_in = 1; diff --git a/eater_cpu/eater_types.sv b/eater_cpu/eater_types.sv index a39977e..6f69b4b 100644 --- a/eater_cpu/eater_types.sv +++ b/eater_cpu/eater_types.sv @@ -39,6 +39,11 @@ typedef enum logic[7:0] { // SUB: c) ALU -> A SUB_ALU_to_A, + // STA: a) LSB of INStruction into MAR + STA_INS_to_MAR, + // STA: b) A -> MEM + STA_A_to_MEM, + // OUT: A -> OUT OUT_A_to_OUT, @@ -51,6 +56,7 @@ typedef enum logic[3:0] { LDA = 'b0001, ADD = 'b0010, SUB = 'b0011, + STA = 'b0100, OUT = 'b1110, HALT_op = 'b1111 } eater_instruction; diff --git a/eater_cpu/readme.txt b/eater_cpu/readme.txt index b75a00c..402f0bb 100644 --- a/eater_cpu/readme.txt +++ b/eater_cpu/readme.txt @@ -32,6 +32,7 @@ NOP ____________ 0b_0000_xxxx No-op LDA <memaddress> 0b_0001_<memaddress> Load memory > A ADD <memaddress> 0b_0010_<memaddress> "Add memory": mem>B, A + B -> A SUB <memaddress> 0b_0011_<memaddress> "Sub memory": mem>B, A - B-> A +STA <memaddress> 0b_0100_<memaddress> Store A -> memory OUT ____________ 0b_1110_xxxx Output A -> OUT HLT ____________ 0b_1111_xxxx Sets halt flag --- |