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`define RAM_ADDRESS_BITS 23
`define RAM_BYTE_BITS 8
`define RAM_WORD_BYTES 2
`define RAM_LINE_WORDS 1
`define PDP_ADDRESS_BITS 15
`define UART_BYTE_BITS 8
`define TAG_BITS 1
typedef bit [`RAM_ADDRESS_BITS-1:0] ram_word_address_t;
typedef bit [`RAM_ADDRESS_BITS-1:$clog2(`RAM_LINE_WORDS)] ram_line_address_t;
typedef bit [`RAM_BYTE_BITS-1:0] ram_byte_t;
typedef ram_byte_t [`RAM_WORD_BYTES-1:0] ram_word_t;
typedef ram_word_t [`RAM_LINE_WORDS-1:0] ram_line_t;
typedef bit [$clog2(`RAM_WORD_BYTES):0] ram_word_mask_t;
typedef ram_word_mask_t [`RAM_LINE_WORDS-1:0] ram_line_mask_t;
typedef bit [$clog2(`RAM_WORD_BYTES+1):0] ram_byte_count_t;
typedef bit [$clog2(`RAM_LINE_WORDS+1):0] ram_word_count_t;
typedef bit [`RAM_ADDRESS_BITS-1:`PDP_ADDRESS_BITS] ram_pdp_address_space_t;
typedef bit [`PDP_ADDRESS_BITS-1:0] pdp_word_address_t;
typedef bit [`PDP_ADDRESS_BITS-1:$clog2(`RAM_LINE_WORDS)] pdp_line_address_t;
typedef bit [`TAG_BITS-1:0] tag_t;
typedef bit [`UART_BYTE_BITS-1:0] uart_byte_t;
typedef struct {
ram_line_address_t address;
bit write;
ram_line_t data;
ram_line_mask_t mask;
tag_t tag;
} ram_command_t;
typedef struct {
ram_line_address_t address;
ram_line_t data;
tag_t tag;
} ram_read_response_t;
typedef struct {
pdp_line_address_t address;
bit write;
ram_line_t data;
ram_line_mask_t mask;
tag_t tag;
} pdp_command_t;
typedef struct {
pdp_line_address_t address;
ram_line_t data;
tag_t tag;
} pdp_read_response_t;
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