repo2/firmware/cartridge.c @ 461
| 195 | markw | #include "memory.h"
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#include "simpledir.h"
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#include "cartridge.h"
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#include "log.h"
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struct CartDef {
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unsigned char carttype; // type from CAR header
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unsigned char mode; // mode used in cartridge emulation
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unsigned short size; // size in k
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};
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// 8k modes (0xA000-$BFFF)
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#define TC_MODE_OFF 0x00 // cart disabled
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#define TC_MODE_8K 0x01 // 8k banks at $A000
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#define TC_MODE_ATARIMAX1 0x02 // 8k using Atarimax 1MBit compatible banking
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#define TC_MODE_ATARIMAX8 0x03 // 8k using Atarimax 8MBit compatible banking
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#define TC_MODE_OSS 0x04 // 16k OSS cart, M091 banking
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#define TC_MODE_SDX64 0x08 // SDX 64k cart, $D5Ex banking
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#define TC_MODE_DIAMOND64 0x09 // Diamond GOS 64k cart, $D5Dx banking
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#define TC_MODE_EXPRESS64 0x0A // Express 64k cart, $D57x banking
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#define TC_MODE_ATRAX128 0x0C // Atrax 128k cart
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#define TC_MODE_WILLIAMS64 0x0D // Williams 64k cart
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// 16k modes (0x8000-$BFFF)
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//#define TC_MODE_FLEXI 0x20 // flexi mode
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#define TC_MODE_16K 0x21 // 16k banks at $8000-$BFFF
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#define TC_MODE_MEGAMAX16 0x22 // MegaMax 16k mode (up to 2MB)
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#define TC_MODE_BLIZZARD 0x23 // Blizzard 16k
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#define TC_MODE_SIC 0x24 // Sic!Cart 512k
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#define TC_MODE_MEGA_16 0x28 // switchable MegaCarts
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#define TC_MODE_MEGA_32 0x29
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#define TC_MODE_MEGA_64 0x2A
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#define TC_MODE_MEGA_128 0x2B
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#define TC_MODE_MEGA_256 0x2C
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#define TC_MODE_MEGA_512 0x2D
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#define TC_MODE_MEGA_1024 0x2E
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#define TC_MODE_MEGA_2048 0x2F
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#define TC_MODE_XEGS_32 0x30 // non-switchable XEGS carts
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#define TC_MODE_XEGS_64 0x31
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#define TC_MODE_XEGS_128 0x32
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#define TC_MODE_XEGS_256 0x33
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#define TC_MODE_XEGS_512 0x34
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#define TC_MODE_XEGS_1024 0x35
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#define TC_MODE_SXEGS_32 0x38 // switchable XEGS carts
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#define TC_MODE_SXEGS_64 0x39
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#define TC_MODE_SXEGS_128 0x3A
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#define TC_MODE_SXEGS_256 0x3B
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#define TC_MODE_SXEGS_512 0x3C
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#define TC_MODE_SXEGS_1024 0x3D
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static struct CartDef cartdef[] = {
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{ 1, TC_MODE_8K, 8 },
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{ 2, TC_MODE_16K, 16 },
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{ 8, TC_MODE_WILLIAMS64, 64 },
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{ 9, TC_MODE_EXPRESS64, 64 },
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{ 10, TC_MODE_DIAMOND64, 64 },
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{ 11, TC_MODE_SDX64, 64 },
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{ 12, TC_MODE_XEGS_32, 32 },
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{ 13, TC_MODE_XEGS_64, 64 },
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{ 14, TC_MODE_XEGS_128, 128 },
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{ 15, TC_MODE_OSS, 16 },
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{ 17, TC_MODE_ATRAX128, 128 },
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{ 23, TC_MODE_XEGS_256, 256 },
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{ 24, TC_MODE_XEGS_512, 512 },
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{ 26, TC_MODE_MEGA_16, 16 },
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{ 27, TC_MODE_MEGA_32, 32 },
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{ 28, TC_MODE_MEGA_64, 64 },
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{ 29, TC_MODE_MEGA_128, 128 },
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{ 30, TC_MODE_MEGA_256, 256 },
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{ 31, TC_MODE_MEGA_512, 512 },
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{ 33, TC_MODE_SXEGS_32, 32 },
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{ 34, TC_MODE_SXEGS_64, 64 },
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{ 35, TC_MODE_SXEGS_128, 128 },
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{ 36, TC_MODE_SXEGS_256, 256 },
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{ 37, TC_MODE_SXEGS_512, 512 },
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{ 40, TC_MODE_BLIZZARD, 16 },
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{ 41, TC_MODE_ATARIMAX1, 128 },
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{ 42, TC_MODE_ATARIMAX8, 1024 },
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{ 56, TC_MODE_SIC, 512 },
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{ 0, 0, 0 }
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};
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int load_car(struct SimpleFile* file)
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{
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if (CARTRIDGE_MEM == 0) {
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LOG("no cartridge memory\n");
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return 0;
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}
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int len;
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enum SimpleFileStatus ok;
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unsigned char header[16];
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ok = file_read(file, header, 16, &len);
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if (ok != SimpleFile_OK || len != 16) {
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LOG("cannot read cart header\n");
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return 0;
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}
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unsigned char carttype = header[7];
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// search for cartridge definition
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struct CartDef* def = cartdef;
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while (def->carttype && def->carttype != carttype) {
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def++;
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}
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if (def->carttype == 0) {
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LOG("illegal cart type %d\n", carttype);
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return 0;
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}
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| 206 | markw | unsigned int byte_len = (unsigned int) def->size << 10;
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ok = file_read(file, CARTRIDGE_MEM, byte_len, &len);
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if (ok != SimpleFile_OK || len != byte_len) {
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LOG("cannot read cart data\n");
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return 0;
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| 195 | markw | }
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LOG("cart type: %d size: %dk\n",
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def->mode, def->size);
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return def->mode;
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}
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