bbc_micro_de1_cl_io

Files
file	bbc_micro_de1_cl.cdl
	BBC microcomputer with RAMs for the CL DE1 + daughterboard.

Detailed Description

Modules

module bbc_micro_de1_cl_io::bbc_micro_de1_cl_io	(	clock	clk,
		clock	video_clk,
		input bit	reset_n,
		input bit	bbc_reset_n,
		input bit	framebuffer_reset_n,
		input bit	keys[4],
		input bit	switches[10],
		input t_bbc_clock_control	clock_control,
		output t_bbc_keyboard	bbc_keyboard,
		output t_video_bus	video_bus,
		output t_csr_request	csr_request,
		input t_csr_response	csr_response,
		input t_ps2_pins	ps2_in,
		output t_ps2_pins	ps2_out,
		input t_de1_cl_inputs_status	inputs_status,
		output t_de1_cl_inputs_control	inputs_control,
		output bit	lcd_source,
		output bit	leds[10],
		output bit	led_chain
	)

Parameters

[in]	clk	50MHz clock from DE1 clock generator
[in]	video_clk	9MHz clock from PLL, derived from 50MHz
[in]	reset_n	hard reset from a pin - a key on DE1
[in]	ps2_in	PS2 input pins
[out]	ps2_out	PS2 output pin driver open collector
[in]	inputs_status	DE1 CL daughterboard shifter register etc status
[out]	inputs_control	DE1 CL daughterboard shifter register control