| 4142 | } |
| 4143 | |
| 4144 | void DISK_update_predict(void) |
| 4145 | { |
| 4146 | int finaleventcycle = maxhpos << 8; |
| 4147 | int finaleventflag = 0; |
| 4148 | bool noselected = true; |
| 4149 | |
| 4150 | int startcycle = disk_hpos; |
| 4151 | |
| 4152 | for (int dr = 0; dr < MAX_FLOPPY_DRIVES; dr++) { |
| 4153 | drive *drv = &floppy[dr]; |
| 4154 | |
| 4155 | if (drv->motoroff) |
| 4156 | continue; |
| 4157 | if (!drv->trackspeed) |
| 4158 | continue; |
| 4159 | if ((selected | disabled) & (1 << dr)) |
| 4160 | continue; |
| 4161 | |
| 4162 | bool isempty = drive_empty(drv); |
| 4163 | bool isunformatted = unformatted(drv); |
| 4164 | int mfmpos = drv->mfmpos; |
| 4165 | bool tdsksync_on = dsksync_on; |
| 4166 | if (drv->tracktiming[0]) |
| 4167 | updatetrackspeed (drv, mfmpos); |
| 4168 | int diskevent_flag = 0; |
| 4169 | uae_u32 tword = word; |
| 4170 | noselected = false; |
| 4171 | int countcycle = startcycle; |
| 4172 | int tdsklength = dsklength; |
| 4173 | int tbitoffset = bitoffset; |
| 4174 | |
| 4175 | while (countcycle < (maxhpos << 8)) { |
| 4176 | int inc = nextbit(drv); |
| 4177 | if (drv->tracktiming[0]) |
| 4178 | updatetrackspeed (drv, mfmpos); |
| 4179 | if (dskdmaen != DSKDMA_WRITE || (dskdmaen == DSKDMA_WRITE && !dma_enable)) { |
| 4180 | tword <<= 1; |
| 4181 | if (!isempty) { |
| 4182 | if (isunformatted) |
| 4183 | tword |= (uaerand () & 0x1000) ? 1 : 0; |
| 4184 | else |
| 4185 | tword |= getonebit(drv, drv->bigmfmbuf, mfmpos, &inc); |
| 4186 | } |
| 4187 | if ((tword & 0xffff) != dsksync) { |
| 4188 | tdsksync_on = false; |
| 4189 | } |
| 4190 | if ((tword & 0xffff) == dsksync && !tdsksync_on) { |
| 4191 | diskevent_flag |= DISK_WORDSYNC; |
| 4192 | tdsksync_on = true; |
| 4193 | } |
| 4194 | } |
| 4195 | int pmfmpos = mfmpos; |
| 4196 | mfmpos += inc; |
| 4197 | mfmpos %= drv->tracklen; |
| 4198 | if (!dskdmaen) { |
| 4199 | if (mfmpos == 0) |
| 4200 | diskevent_flag |= DISK_REVOLUTION << (drv - floppy); |
| 4201 | if (drive_at_index(drv, pmfmpos, mfmpos)) |
no test coverage detected