/* * 74181 * * 4-Bit Arithmetic Logic Unit * */ /* constants for setting input lines */ #define TTL74181_INPUT_A0 (0) #define TTL74181_INPUT_A1 (1) #define TTL74181_INPUT_A2 (2) #define TTL74181_INPUT_A3 (3) #define TTL74181_INPUT_B0 (4) #define TTL74181_INPUT_B1 (5) #define TTL74181_INPUT_B2 (6) #define TTL74181_INPUT_B3 (7) #define TTL74181_INPUT_S0 (8) #define TTL74181_INPUT_S1 (9) #define TTL74181_INPUT_S2 (10) #define TTL74181_INPUT_S3 (11) #define TTL74181_INPUT_C (12) #define TTL74181_INPUT_M (13) /* constants for reads output lines */ #define TTL74181_OUTPUT_F0 (0) #define TTL74181_OUTPUT_F1 (1) #define TTL74181_OUTPUT_F2 (2) #define TTL74181_OUTPUT_F3 (3) #define TTL74181_OUTPUT_AEQB (4) #define TTL74181_OUTPUT_P (5) #define TTL74181_OUTPUT_G (6) #define TTL74181_OUTPUT_CN4 (7) void TTL74181_config(running_machine *machine, int chip, void *interface); void TTL74181_reset(int chip); void TTL74181_write(int chip, int startline, int lines, UINT8 data); UINT8 TTL74181_read(int chip, int startline, int lines);