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module main(
//--Input/Output Definition----------------------------------------------------
// clocks
input fclk,
output clkz_out,
input clkz_in,
// z80
input iorq_n,
input mreq_n,
input rd_n,
input wr_n,
input m1_n,
input rfsh_n,
input int_n,
input nmi_n,
input wait_n,
output res,
input [7:0] d,
input [15:0] a,
// zxbus and related
output csrom,
output romoe_n,
output romwe_n,
input rompg0_n,
input dos_n, // aka rompg1
input rompg2,
input rompg3,
input rompg4,
input iorqge1,
input iorqge2,
output iorq1_n,
output iorq2_n,
// DRAM
input [15:0] rd,
input [9:0] ra,
output rwe_n,
output rucas_n,
output rlcas_n,
output rras0_n,
output rras1_n,
// video
input [1:0] vred,
input [1:0] vgrn,
input [1:0] vblu,
input vhsync,
input vvsync,
input vcsync,
// AY control and audio/tape
input ay_clk,
output ay_bdir,
output ay_bc1,
output beep,
// IDE
input [2:0] ide_a,
input [15:0] ide_d,
output ide_dir,
input ide_rdy,
output ide_cs0_n,
output ide_cs1_n,
output ide_rs_n,
output ide_rd_n,
output ide_wr_n,
// VG93 and diskdrive
input vg_clk,
output vg_cs_n,
output vg_res_n,
input vg_hrdy,
input vg_rclk,
input vg_rawr,
input [1:0] vg_a, // disk drive selection
input vg_wrd,
input vg_side,
input step,
input vg_sl,
input vg_sr,
input vg_tr43,
input rdat_b_n,
input vg_wf_de,
input vg_drq,
input vg_irq,
input vg_wd,
// serial links (atmega-fpga, sdcard)
output sdcs_n,
output sddo,
output sdclk,
input sddi,
input spics_n,
input spick,
input spido,
output spidi,
input spiint_n
);
//--Dummy----------------------------------------------------------------------
assign iorq1_n = 1'b1;
assign iorq2_n = 1'b1;
assign res= 1'b1;
assign rwe_n = 1'b1;
assign rucas_n = 1'b1;
assign rlcas_n = 1'b1;
assign rras0_n = 1'b1;
assign rras1_n = 1'b1;
assign ay_bdir = 1'b0;
assign ay_bc1 = 1'b0;
assign vg_cs_n = 1'b1;
assign vg_res_n = 1'b0;
assign ide_dir=1'b1;
assign ide_rs_n = 1'b0;
assign ide_cs0_n = 1'b1;
assign ide_cs1_n = 1'b1;
assign ide_rd_n = 1'b1;
assign ide_wr_n = 1'b1;
assign clkz_out = 1'b0;
assign csrom = 1'b0;
assign romoe_n = 1'b1;
assign romwe_n = 1'b1;
//--Main wires-----------------------------------------------------------------
assign sdclk = spick;
assign sddo = spido;
assign spidi = sddi;
assign sdcs_n = spics_n;
assign beep = spiint_n;
endmodule