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Add parsing of o65 files

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Prints out information about the first file found on the SD card, if it
is an o65 file.
This commit is contained in:
Byron Lathi
2022-04-16 14:10:54 -05:00
parent 59da06c509
commit f15b7876fe
1 changed files with 23 additions and 2 deletions
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25
sw/main.c
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@@ -6,6 +6,7 @@
#include "mapper.h" #include "mapper.h"
#include "sd_card.h" #include "sd_card.h"
#include "fat.h" #include "fat.h"
#include "o65.h"
uint8_t buf[512]; uint8_t buf[512];
@@ -76,6 +77,8 @@ int main() {
dos_dentry_t* dos_dentry; dos_dentry_t* dos_dentry;
uint32_t cluster; uint32_t cluster;
o65_header_t* header;
uint16_t reserved_count; uint16_t reserved_count;
uint32_t sectors_per_fat; uint32_t sectors_per_fat;
@@ -192,14 +195,32 @@ int main() {
cprintf("DOS name: %.8s.%.3s\n", &dos_dentry->filename, &dos_dentry->extension); cprintf("DOS name: %.8s.%.3s\n", &dos_dentry->filename, &dos_dentry->extension);
cluster = (dos_dentry->first_cluster_h << 16) + dos_dentry->first_cluster_l; cluster = ((uint32_t)dos_dentry->first_cluster_h << 16) + dos_dentry->first_cluster_l;
cprintf("Cluster: %ld\n", cluster); cprintf("Cluster: %ld\n", cluster);
cprintf("File location: %lx\n", data_region_start + (cluster - 2) * 8); cprintf("File location: %lx\n", data_region_start + (cluster - 2) * 8);
sd_readblock(data_region_start + (cluster - 2) * 8); sd_readblock(data_region_start + (cluster - 2) * 8);
cprintf("File contents: %s\n", buf); header = (o65_header_t*)buf;
if (header->c64_marker == O65_NON_C64 &&
header->magic[0] == O65_MAGIC_0 &&
header->magic[1] == O65_MAGIC_1 &&
header->magic[2] == O65_MAGIC_2) {
cprintf("Found a valid o65 file!\n\n");
cprintf("tbase: %x\n", header->tbase);
cprintf("tlen: %x\n", header->tlen);
cprintf("dbase: %x\n", header->dbase);
cprintf("dlen: %x\n", header->dlen);
cprintf("bbase: %x\n", header->bbase);
cprintf("blen: %x\n", header->blen);
cprintf("zbase: %x\n", header->zbase);
cprintf("zlen: %x\n", header->zlen);
cprintf("stack: %x\n", header->stack);
}
cprintf("Done!\n"); cprintf("Done!\n");