Fix for some crashing WOZ, uncommented code!

I had left a block of code commented out, and that was crashing some
disks with 'special' track mapping.

Also now clear the CRC field on the woz, if any, when writing tracks.

Signed-off-by: Michel Pollet <buserror@gmail.com>

README.md

@@ -1,3 +1,7 @@
+<p align="center">
+   <img src="contrib/mii-icon-64.png" alt="MII Logo">
+</p>
+
 # MII Version Changelog
 ## 1.6
  * Another big update, yanked the old DiskII driver, and replaced it with a

src/drivers/mii_disk2.c

@@ -36,7 +36,7 @@ typedef struct mii_card_disk2_t {
 
 	uint8_t 		write_register;
 	uint8_t 		head : 4;		// bits are shifted in there
-	uint8_t 		clock : 3;		// LSS clock cycles, read a bit when 0
+	uint16_t 		clock;			// LSS clock cycles, read a bit when 0
 	uint8_t 		lss_state : 4,	// Sequence state
 					lss_mode : 4;	// WRITE/LOAD/SHIFT/QA/RP etc
 	uint8_t 		lss_prev_state;	// for write bit
@@ -248,6 +248,8 @@ _mii_disk2_command(
 				if (!file)
 					return -1;
 			}
+			// reinit all tracks, bits, maps etc
+			mii_floppy_init(&c->floppy[drive]);
 			mii_dd_drive_load(&c->drive[drive], file);
 			mii_floppy_load(&c->floppy[drive], file);
 			break;
@@ -347,7 +349,9 @@ _mii_disk2_lss_tick(
 
 	c->lss_mode = (c->lss_mode & ~(1 << QA_BIT)) |
 					(!!(c->data_register & 0x80) << QA_BIT);
-	if (c->clock++ == 0) { // clock is clipped to 3 bits
+	c->clock += 4;	// 4 is 0.5us.. we run at 2MHz
+	if (c->clock >= f->bit_timing) {
+		c->clock -= f->bit_timing;
 		uint8_t 	track_id = f->track_id[f->qtrack];
 
 		uint32_t 	byte_index 	= f->bit_position >> 3;
@@ -360,6 +364,8 @@ _mii_disk2_lss_tick(
 			if ((c->head & 0xf) == 0) {
 				bit = f->tracks[MII_FLOPPY_RANDOM_TRACK_ID].data[byte_index];
 				bit = (bit >> bit_index) & 1;
+//				printf("RANDOM TRACK %2d %2d %2d : %d\n",
+//						track_id, byte_index, bit_index, bit);
 			} else {
 				bit = (c->head >> 1) & 1;
 			}

src/format/mii_floppy.c

@@ -20,8 +20,12 @@ mii_floppy_init(
 {
 	f->motor 		= 0;
 	f->stepper 		= 0;
+	// see spec for this.. 32 is the default for 4us.
+
+	f->bit_timing 	= 32;
 	f->qtrack 		= 15;	// just to see something at seek time
 	f->bit_position = 0;
+	f->tracks_dirty = 0;
 	f->write_protected &= ~MII_FLOPPY_WP_MANUAL;// keep the manual WP bit
 	/* this will look like this; ie half tracks are 'random'
 		0: 0   1: 0   2:35   3: 1
@@ -164,6 +168,13 @@ mii_floppy_write_track_woz(
 	}
 	version += !strncmp((char*)header, "WOZ2", 4);
 
+	/* I don't really want to recalculate the CRC. Seems pointless in a file
+	  like this, and i'd have to walk 250KB+ of data each time I update
+	  anything.
+	  Mark is as cleared, perhapps I need a tool to 'fix' it later, or JUST
+	  at closing time ?*/
+	header->crc_le = 0;
+
 	mii_woz_tmap_t *tmap = NULL;
 	if (version == 1) {
 		mii_woz1_info_t *info = (mii_woz1_info_t *)(header + 1);
@@ -230,7 +241,6 @@ mii_floppy_load_woz(
 			uint8_t *track = trks->track[i].bits;
 			memcpy(f->tracks[i].data, track, le16toh(trks->track[i].byte_count_le));
 			f->tracks[i].bit_count = le32toh(trks->track[i].bit_count_le);
-			f->tracks[i].dirty = 0;
 		}
 	} else {
 		mii_woz2_info_t *info = (mii_woz2_info_t *)(header + 1);
@@ -239,9 +249,10 @@ mii_floppy_load_woz(
 		mii_woz2_trks_t *trks = (mii_woz2_trks_t *)((uint8_t *)tmap +
 					le32toh(tmap->chunk.size_le) + sizeof(mii_woz_chunk_t));
 #if 1
-		printf("WOZ: version %d, type %d, sides %d, largest track %d\n",
+		printf("WOZ: version %d, type %d, sides %d, largest track %d, optimal bit timing: %d\n",
 				info->version, info->disk_type, info->sides,
-				le16toh(info->largest_track_le) * 512);
+				le16toh(info->largest_track_le) * 512,
+				info->optimal_bit_timing);
 		printf("WOZ: creator '%s'\n", info->creator);
 		printf("WOZ: track map %4.4s size %d\n",
 				(char*)&tmap->chunk.id_le,
@@ -249,16 +260,16 @@ mii_floppy_load_woz(
 		printf("WOZ: Track chunk %4.4s size %d\n",
 				(char*)&trks->chunk.id_le, le32toh(trks->chunk.size_le));
 #endif
+		/* TODO: this doesn't work yet... */
+		// f->bit_timing = info->optimal_bit_timing;
 		for (int i = 0; i < 35; i++) {
 			uint8_t *track = file->map +
 						(le16toh(trks->track[i].start_block_le) << 9);
 			uint32_t byte_count = (le32toh(trks->track[i].bit_count_le) + 7) >> 3;
 			memcpy(f->tracks[i].data, track, byte_count);
 			f->tracks[i].bit_count = le32toh(trks->track[i].bit_count_le);
-			f->tracks[i].dirty = 0;
 		}
 	}
-	#if 0
 	// copy the track map from the file to the floppy
 	for (int ti = 0; ti < (int)sizeof(f->track_id); ti++) {
 		f->track_id[ti] = tmap->track_id[ti] == 0xff ?
@@ -268,7 +279,6 @@ mii_floppy_load_woz(
 				__func__, ti, f->track_id[ti]);
 		}
 	}
-	#endif
 	return version;
 }
 

src/format/mii_floppy.h

@@ -30,6 +30,7 @@ typedef struct mii_floppy_track_t {
 
 typedef struct mii_floppy_t {
 	uint8_t 		write_protected : 3, id : 2;
+	uint8_t 		bit_timing;		// 0=32 (default)
 	uint8_t			motor;			// motor is on
 	uint8_t 		stepper;		// last step we did...
 	uint8_t 		qtrack;			// quarter track we are on

ui_gl/mii_mui_1mb.c

@@ -38,7 +38,8 @@ typedef struct mii_mui_1mb_t {
 	mii_1mb_conf_t 			config;
 } mii_mui_1mb_t;
 
-static void
+// TODO: Dedup that with mii_mui_2dsk.c
+void
 _size_string(
 		size_t s,
 		char *out,

ui_gl/mii_mui_settings.c

@@ -355,12 +355,18 @@ mii_emu_load(
 				cl = mii_config_get(cf, section, "flags0");
 				if (cl)
 					config->slot[i].conf.disk2.drive[0].flags = strtoul(cl->value, NULL, 0);
+				cl = mii_config_get(cf, section, "wp0");
+				if (cl)
+					config->slot[i].conf.disk2.drive[0].wp = !!strtoul(cl->value, NULL, 0);
 				cl = mii_config_get(cf, section, "image1");
 				if (cl)
 					strcpy(config->slot[i].conf.disk2.drive[1].disk, cl->value);
 				cl = mii_config_get(cf, section, "flags1");
 				if (cl)
 					config->slot[i].conf.disk2.drive[1].flags = strtoul(cl->value, NULL, 0);
+				cl = mii_config_get(cf, section, "wp1");
+				if (cl)
+					config->slot[i].conf.disk2.drive[1].wp = !!strtoul(cl->value, NULL, 0);
 				break;
 			case MII_SLOT_DRIVER_SUPERSERIAL:
 				cl = mii_config_get(cf, section, "device");

ui_gl/mii_mui_settings.h

@@ -38,7 +38,8 @@ typedef struct mii_config_file_t {
 } mii_config_file_t;
 
 typedef struct mii_drive_conf_t {
-	unsigned long 			flags;
+	unsigned long 			wp : 1, ro_file : 1, ro_format : 1,
+							flags;
 	char 					disk[MII_PATH_SIZE_MAX];
 } mii_drive_conf_t;