/***************************************************************************** 74153 Dual 4-line to 1-line data selectors/multiplexers Pin layout and functions to access pins: enable_w(0) [1] /1G VCC [16] b_w [2] B /2G [15] enable_w(1) input_line_w(0,3) [3] 1C3 A [14] a_w input_line_w(0,2) [4] 1C2 2C3 [13] input_line_w(1,3) input_line_w(0,1) [5] 1C1 2C2 [12] input_line_w(1,2) input_line_w(0,0) [6] 1C0 2C1 [11] input_line_w(1,1) output_r(0) [7] 1Y 2C0 [10] input_line_w(1,0) [8] GND 2Y [9] output_r(1) Truth table (all logic levels indicate the actual voltage on the line): INPUTS | OUTPUT | G | B A | C0 C1 C2 C3 | Y --+------+-------------+--- H | X X | X X X X | L L | L L | X X X X | C0 L | L H | X X X X | C1 L | H L | X X X X | C2 L | H H | X X X X | C3 --+------+-------------+--- L = lo (0) H = hi (1) X = any state *****************************************************************************/ #ifndef TTL74153_H #define TTL74153_H #include "devlegcy.h" typedef struct _ttl74153_config ttl74153_config; struct _ttl74153_config { void (*output_cb)(running_device *device); }; #define MDRV_74153_ADD(_tag, _output_cb) \ MDRV_DEVICE_ADD(_tag, TTL74153, 0) \ MDRV_DEVICE_CONFIG_DATAPTR(ttl74153_config, output_cb, _output_cb) /* must call TTL74153_update() after setting the inputs */ void ttl74153_update(running_device *device); void ttl74153_a_w(running_device *device, int data); void ttl74153_b_w(running_device *device, int data); void ttl74153_input_line_w(running_device *device, int section, int input_line, int data); void ttl74153_enable_w(running_device *device, int section, int data); int ttl74153_output_r(running_device *device, int section); DECLARE_LEGACY_DEVICE(TTL74153, ttl74153); #endif