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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert

// Creation of Apple ProDOS floppy images

#include "emu.h"
#include "fs_prodos.h"
#include "ap_dsk35.h"

const u8 fs_prodos::boot[512] = {
	0x01, 0x38, 0xb0, 0x03, 0x4c, 0x1c, 0x09, 0x78, 0x86, 0x43, 0xc9, 0x03, 0x08, 0x8a, 0x29, 0x70,
	0x4a, 0x4a, 0x4a, 0x4a, 0x09, 0xc0, 0x85, 0x49, 0xa0, 0xff, 0x84, 0x48, 0x28, 0xc8, 0xb1, 0x48,
	0xd0, 0x3a, 0xb0, 0x0e, 0xa9, 0x03, 0x8d, 0x00, 0x08, 0xe6, 0x3d, 0xa5, 0x49, 0x48, 0xa9, 0x5b,
	0x48, 0x60, 0x85, 0x40, 0x85, 0x48, 0xa0, 0x5e, 0xb1, 0x48, 0x99, 0x94, 0x09, 0xc8, 0xc0, 0xeb,
	0xd0, 0xf6, 0xa2, 0x06, 0xbc, 0x32, 0x09, 0xbd, 0x39, 0x09, 0x99, 0xf2, 0x09, 0xbd, 0x40, 0x09,
	0x9d, 0x7f, 0x0a, 0xca, 0x10, 0xee, 0xa9, 0x09, 0x85, 0x49, 0xa9, 0x86, 0xa0, 0x00, 0xc9, 0xf9,
	0xb0, 0x2f, 0x85, 0x48, 0x84, 0x60, 0x84, 0x4a, 0x84, 0x4c, 0x84, 0x4e, 0x84, 0x47, 0xc8, 0x84,
	0x42, 0xc8, 0x84, 0x46, 0xa9, 0x0c, 0x85, 0x61, 0x85, 0x4b, 0x20, 0x27, 0x09, 0xb0, 0x66, 0xe6,
	0x61, 0xe6, 0x61, 0xe6, 0x46, 0xa5, 0x46, 0xc9, 0x06, 0x90, 0xef, 0xad, 0x00, 0x0c, 0x0d, 0x01,
	0x0c, 0xd0, 0x52, 0xa9, 0x04, 0xd0, 0x02, 0xa5, 0x4a, 0x18, 0x6d, 0x23, 0x0c, 0xa8, 0x90, 0x0d,
	0xe6, 0x4b, 0xa5, 0x4b, 0x4a, 0xb0, 0x06, 0xc9, 0x0a, 0xf0, 0x71, 0xa0, 0x04, 0x84, 0x4a, 0xad,
	0x20, 0x09, 0x29, 0x0f, 0xa8, 0xb1, 0x4a, 0xd9, 0x20, 0x09, 0xd0, 0xdb, 0x88, 0x10, 0xf6, 0xa0,
	0x16, 0xb1, 0x4a, 0x4a, 0x6d, 0x1f, 0x09, 0x8d, 0x1f, 0x09, 0xa0, 0x11, 0xb1, 0x4a, 0x85, 0x46,
	0xc8, 0xb1, 0x4a, 0x85, 0x47, 0xa9, 0x00, 0x85, 0x4a, 0xa0, 0x1e, 0x84, 0x4b, 0x84, 0x61, 0xc8,
	0x84, 0x4d, 0x20, 0x27, 0x09, 0xb0, 0x35, 0xe6, 0x61, 0xe6, 0x61, 0xa4, 0x4e, 0xe6, 0x4e, 0xb1,
	0x4a, 0x85, 0x46, 0xb1, 0x4c, 0x85, 0x47, 0x11, 0x4a, 0xd0, 0x18, 0xa2, 0x01, 0xa9, 0x00, 0xa8,
	0x91, 0x60, 0xc8, 0xd0, 0xfb, 0xe6, 0x61, 0xea, 0xea, 0xca, 0x10, 0xf4, 0xce, 0x1f, 0x09, 0xf0,
	0x07, 0xd0, 0xd8, 0xce, 0x1f, 0x09, 0xd0, 0xca, 0x58, 0x4c, 0x00, 0x20, 0x4c, 0x47, 0x09, 0x02,
	0x26, 0x50, 0x52, 0x4f, 0x44, 0x4f, 0x53, 0xa5, 0x60, 0x85, 0x44, 0xa5, 0x61, 0x85, 0x45, 0x6c,
	0x48, 0x00, 0x08, 0x1e, 0x24, 0x3f, 0x45, 0x47, 0x76, 0xf4, 0xd7, 0xd1, 0xb6, 0x4b, 0xb4, 0xac,
	0xa6, 0x2b, 0x18, 0x60, 0x4c, 0xbc, 0x09, 0x20, 0x58, 0xfc, 0xa0, 0x14, 0xb9, 0x58, 0x09, 0x99,
	0xb1, 0x05, 0x88, 0x10, 0xf7, 0x4c, 0x55, 0x09, 0xd5, 0xce, 0xc1, 0xc2, 0xcc, 0xc5, 0xa0, 0xd4,
	0xcf, 0xa0, 0xcc, 0xcf, 0xc1, 0xc4, 0xa0, 0xd0, 0xd2, 0xcf, 0xc4, 0xcf, 0xd3, 0xa5, 0x53, 0x29,
	0x03, 0x2a, 0x05, 0x2b, 0xaa, 0xbd, 0x80, 0xc0, 0xa9, 0x2c, 0xa2, 0x11, 0xca, 0xd0, 0xfd, 0xe9,
	0x01, 0xd0, 0xf7, 0xa6, 0x2b, 0x60, 0xa5, 0x46, 0x29, 0x07, 0xc9, 0x04, 0x29, 0x03, 0x08, 0x0a,
	0x28, 0x2a, 0x85, 0x3d, 0xa5, 0x47, 0x4a, 0xa5, 0x46, 0x6a, 0x4a, 0x4a, 0x85, 0x41, 0x0a, 0x85,
	0x51, 0xa5, 0x45, 0x85, 0x27, 0xa6, 0x2b, 0xbd, 0x89, 0xc0, 0x20, 0xbc, 0x09, 0xe6, 0x27, 0xe6,
	0x3d, 0xe6, 0x3d, 0xb0, 0x03, 0x20, 0xbc, 0x09, 0xbc, 0x88, 0xc0, 0x60, 0xa5, 0x40, 0x0a, 0x85,
	0x53, 0xa9, 0x00, 0x85, 0x54, 0xa5, 0x53, 0x85, 0x50, 0x38, 0xe5, 0x51, 0xf0, 0x14, 0xb0, 0x04,
	0xe6, 0x53, 0x90, 0x02, 0xc6, 0x53, 0x38, 0x20, 0x6d, 0x09, 0xa5, 0x50, 0x18, 0x20, 0x6f, 0x09,
	0xd0, 0xe3, 0xa0, 0x7f, 0x84, 0x52, 0x08, 0x28, 0x38, 0xc6, 0x52, 0xf0, 0xce, 0x18, 0x08, 0x88,
	0xf0, 0xf5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

void fs_prodos::enumerate(floppy_enumerator &fe, uint32_t form_factor, const std::vector<uint32_t> &variants) const
{
	bool all = form_factor == floppy_image::FF_UNKNOWN;

	if(all || (form_factor == floppy_image::FF_35 && has_variant(variants, floppy_image::DSDD)))
		fe.add(this, FLOPPY_APPLE_GCR_FORMAT, 819200, "prodos_800k", 800, "Apple ProDOS 800K");
	if(all || (form_factor == floppy_image::FF_35 && has_variant(variants, floppy_image::SSDD)))
		fe.add(this, FLOPPY_APPLE_GCR_FORMAT, 409600, "prodos_400k", 400, "Apple ProDOS 400K");
}

void fs_prodos::floppy_instantiate(u32 key, std::vector<u8> &image) const
{
	std::string volume_name = "UNTITLED";
	u32 blocks = key * 2;

	copy(image, 0x000, boot, 0x200);               // Standard ProDOS boot sector as written by a 2gs

	fill(image, 0x200, 0x00, 0x200);               // No SOS boot sector

	w16l(image, 0x400, 0x0000);                    // Backwards key block pointer (null)
	w16l(image, 0x402, 0x0003);                    // Forwards key block pointer
	w8  (image, 0x404, 0xf0 | volume_name.size()); // Block type (f, key block) and name size
	wstr(image, 0x405, volume_name);               // Volume name, up to 15 characters
	w32b(image, 0x416, 0x642a250d);                // ??? date & time
	w16b(image, 0x41a, 0x80ff);                    // ???
	w32b(image, 0x41c, 0x642a250d);                // Creation date & time
	w8  (image, 0x420, 0x05);                      // ProDOS version (2gs)
	w8  (image, 0x421, 0x00);                      // ProDOS minimum version
	w8  (image, 0x422, 0xc3);                      // Allowed access (destroy, rename, !backup, 3x0, write read)
	w8  (image, 0x423, 0x27);                      // Directory entry length (fixed)
	w8  (image, 0x424, 0x0d);                      // Entries per block (fixed)
	w16l(image, 0x425, 0x0000);                    // Number of file entries in the directory
	w16l(image, 0x427, 0x0006);                    // Bitmap block pointer
	w16l(image, 0x429, blocks);                    // Number of blocks

	w16l(image, 0x600, 0x0002);                    // Backwards block pointer of the second volume block
	w16l(image, 0x602, 0x0004);                    // Forwards block pointer of the second volume block
	w16l(image, 0x800, 0x0003);                    // Backwards block pointer of the third volume block
	w16l(image, 0x802, 0x0005);                    // Forwards block pointer of the third volume block
	w16l(image, 0xa00, 0x0004);                    // Backwards block pointer of the fourth volume block
	w16l(image, 0xa02, 0x0000);                    // Forwards block pointer of the fourth volume block (nmull)

	// Mark blocks 7 to max as free
	for(u32 i = 7; i != blocks; i++)
		image[0xc00 + (i >> 3)] |= 0x80 >> (i & 7);
}

const filesystem_manager_type FS_PRODOS = &filesystem_manager_creator<fs_prodos>;;