// Copyright (c) 1994 - 2023 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause


/*	ZX Spectrum 16/48K:

	issue 1		dflt: grey keys, 16K
	issue 2		dflt: blue keys, 48K
	issue 3		different ear_in level
	issue 4		different ear_in level
	plus		black plastic keyboard;		dflt: issue 4
	span		spanish (not Inves!);		dflt: issue 4 (TODO)
*/


const int  zxsp_basemodel		= zxsp_i3;
const cstr zxsp_model_name_i1	= "ZX Spectrum Issue 1";
const cstr zxsp_model_name_i2	= "ZX Spectrum Issue 2";
const cstr zxsp_model_name_i3	= "ZX Spectrum Issue 3";
const cstr zxsp_model_name_plus = "ZX Spectrum+";
const cstr zxsp_model_name_span = "ZX Spectrum (Spanish)";

const cstr zxsp_rom_filename	  = "48k.rom";
const cstr zxsp_rom_filename_span = "plus_span.rom"; // TODO: preliminary - this is the Inves rom!

const cstr zxsp_kbd_filename_i1	  = "16k_kbd.png"; // grey keys
const cstr zxsp_kbd_filename_i23  = "48k_kbd.png";
const cstr zxsp_kbd_filename_plus = "128k_kbd.jpg";		 // black plastic keys
const cstr zxsp_kbd_filename_span = "128k_kbd_span.jpg"; // TODO: preliminary - same keyboard as Inves?

const cstr zxsp_image_filename_i1	= "16k.jpg"; // grey keys
const cstr zxsp_image_filename_i23	= "48k.jpg";
const cstr zxsp_image_filename_plus = "plus.jpg";
const cstr zxsp_image_filename_span = "plus.jpg"; // TODO: spanish image

const uint32 zxsp_cc_per_second		  = 3500000;
const uint32 zxsp_cc_per_line		  = 224; //  128 T screen, 24 T right border, 48 T hor. retrace, 24 T left border.
const uint	 zxsp_lines_before_screen = 64;
const uint	 zxsp_lines_in_screen	  = 24 * 8;
const uint	 zxsp_lines_after_screen  = 56;

const uint32 zxsp_rom_size	   = 16 * 1024;
const uint32 zxsp_ram_size_16k = 16 * 1024; // default for Issue 1
const uint32 zxsp_ram_size_48k = 48 * 1024; // default for Issue 2, spätestens ab Issue 3B immer
const uint32 zxsp_page_size	   = 16 * 1024;

const uint32 zxsp_tape_load_ret_addr = 0x053F;
const uint32 zxsp_tape_load_routine	 = 0x0556; // index in rom[] of start of tape load routine
const uint32 zxsp_tape_save_routine	 = 0x04D0; // index in rom[] of start of tape save routine

const uint32 zxsp_contended_rampages = 0x80000000; // ram#0 ($4000-$7fff) contended
const uint8	 zxsp_waitmap		 = 0x7E;   // %01111110		kio tested: ZX48K waitmap start:  warm: 14336+1;  cold: 14336+2
const uint32 zxsp_videoram_start = 0x0000; // biased to ram start
const uint32 zxsp_videoram_size	 = 32 * 24 * (8 + 1);

const Sample zxsp_earin_threshold_mic_lo	 = 0.05;  // earout=0 & micout=0 => non-loading setting
const Sample zxsp_earin_threshold_mic_hi_i12 = -0.01; // earout=0 & micout=1 => loadFromTape setting
const Sample zxsp_earin_threshold_mic_hi_i3	 = 0.01;  // earout=0 & micout=1 => loadFromTape setting
const Sample zxsp_earin_threshold_mic_hi_i4 =
	0.00; // Issue 4A: earout=0&micout=1 => loadFromTape setting => rnd noise when no signal