| 1 | open BitVectors;; |
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| 2 | open Physical;; |
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| 3 | |
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| 4 | exception CodeTooLarge |
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| 5 | |
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| 6 | type time = int;; |
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| 7 | type line = [ `P1 of byte |
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| 8 | | `P3 of byte |
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| 9 | | `SerialBuff of [ `Eight of byte |
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| 10 | | `Nine of BitVectors.bit * byte |
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| 11 | ] |
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| 12 | ];; |
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| 13 | |
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| 14 | val string_of_line: line -> string;; |
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| 15 | |
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| 16 | type epsilon = int;; |
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| 17 | |
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| 18 | (* In: reception time, line of input, new continuation, |
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| 19 | Out: transmission time, output line, expected duration until reply, |
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| 20 | new continuation. |
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| 21 | *) |
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| 22 | type continuation = |
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| 23 | [`In of time * line * epsilon * continuation] option * |
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| 24 | [`Out of (time -> line -> time * continuation) ];; |
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| 25 | |
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| 26 | type status = |
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| 27 | { |
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| 28 | (* Memory *) |
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| 29 | code_memory: WordMap.map; (* can be reduced *) |
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| 30 | low_internal_ram: Byte7Map.map; |
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| 31 | high_internal_ram: Byte7Map.map; |
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| 32 | external_ram: WordMap.map; |
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| 33 | |
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| 34 | (* Program counter *) |
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| 35 | pc: word; |
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| 36 | |
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| 37 | (* SFRs *) |
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| 38 | sp: byte; |
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| 39 | dpl: byte; |
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| 40 | dph: byte; |
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| 41 | pcon: byte; |
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| 42 | tcon: byte; |
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| 43 | tmod: byte; |
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| 44 | tl0: byte; |
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| 45 | tl1: byte; |
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| 46 | th0: byte; |
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| 47 | th1: byte; |
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| 48 | p1: byte; |
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| 49 | scon: byte; |
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| 50 | sbuf: byte; |
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| 51 | ie: byte; |
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| 52 | p3: byte; |
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| 53 | ip: byte; |
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| 54 | psw: byte; |
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| 55 | acc: byte; |
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| 56 | b: byte; |
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| 57 | t2con: byte; (* 8052 only *) |
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| 58 | rcap2l: byte; (* 8052 only *) |
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| 59 | rcap2h: byte; (* 8052 only *) |
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| 60 | tl2: byte; (* 8052 only *) |
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| 61 | th2: byte; (* 8052 only *) |
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| 62 | |
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| 63 | (* Latches for the output lines *) |
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| 64 | p1_latch: byte; |
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| 65 | p3_latch: byte; |
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| 66 | |
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| 67 | (* Fields for tracking the state of the processor. *) |
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| 68 | |
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| 69 | (* IO specific *) |
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| 70 | previous_p1_val: bool; |
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| 71 | previous_p3_val: bool; |
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| 72 | |
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| 73 | serial_epsilon_out: epsilon option; |
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| 74 | serial_epsilon_in: epsilon option; |
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| 75 | |
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| 76 | io_epsilon: epsilon; |
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| 77 | |
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| 78 | serial_v_in: [`Eight of byte | `Nine of (BitVectors.bit * byte) ] option; |
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| 79 | serial_v_out: [`Eight of byte | `Nine of (BitVectors.bit * byte) ] option; |
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| 80 | |
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| 81 | serial_k_out: continuation option; |
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| 82 | |
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| 83 | io: continuation; |
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| 84 | expected_out_time: [ `None | `Now | `At of time ]; |
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| 85 | |
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| 86 | (* Timer and clock specific *) |
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| 87 | clock: time; |
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| 88 | timer0: word; |
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| 89 | timer1: word; |
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| 90 | timer2: word; (* can be missing *) |
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| 91 | |
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| 92 | esi_running: bool; |
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| 93 | t0i_running: bool; |
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| 94 | t1i_running: bool; |
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| 95 | e0i_running: bool; |
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| 96 | e1i_running: bool; |
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| 97 | es_running: bool; |
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| 98 | } |
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| 99 | |
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| 100 | val string_of_status: status -> string |
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| 101 | |
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| 102 | module WordMap: Map.S with type key = BitVectors.word |
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| 103 | |
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| 104 | type labelled_memory = BitVectors.byte list * string WordMap.t * bool (* has main *) |
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| 105 | |
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| 106 | val assembly: |
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| 107 | [< ASM.labelled_instruction] ASM.program -> |
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| 108 | (*ASM.instruction list * symbol_table *) labelled_memory |
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| 109 | |
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| 110 | val assembly1 : [< ASM.instruction] -> BitVectors.byte list |
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| 111 | |
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| 112 | (* |
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| 113 | val link: |
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| 114 | (ASM.instruction list * symbol_table * cost_map) list -> BitVectors.byte list |
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| 115 | *) |
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| 116 | |
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| 117 | val initialize: status |
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| 118 | |
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| 119 | val load_code_memory: BitVectors.byte list -> Physical.WordMap.map |
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| 120 | val load_mem: Physical.WordMap.map -> status -> status |
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| 121 | val load: BitVectors.byte list -> status -> status |
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| 122 | |
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| 123 | exception Halt (* to be raised to stop execution *) |
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| 124 | |
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| 125 | (* the callback function is used to observe the execution |
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| 126 | trace; it can raise Hold to stop execution. Otherwise |
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| 127 | the processor never halts. *) |
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| 128 | val execute: (status -> unit) -> status -> status |
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| 129 | |
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| 130 | val fetch: Physical.WordMap.map -> word -> ASM.instruction * word * int |
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