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fm_towns:sdscsi [2023/10/09 11:29] – created leonkfm_towns:sdscsi [2023/10/09 11:42] leonk
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   * Unlike any other computer, mapping between drive partitions and drive letters are also kept in SRAM (Imagine C: and D: partitions you defined in FDisk on a PC had to keep the mapping in BIOS; i.e. Drive 0, partition 0 is C:, drive 0, partition 1 is D:, etc.) If this information is lost, the OS will not boot! Hence, when you download a drive image from the Internet, and try to use it on FM Towns, you must define the partition map in SRAM for it work.   * Unlike any other computer, mapping between drive partitions and drive letters are also kept in SRAM (Imagine C: and D: partitions you defined in FDisk on a PC had to keep the mapping in BIOS; i.e. Drive 0, partition 0 is C:, drive 0, partition 1 is D:, etc.) If this information is lost, the OS will not boot! Hence, when you download a drive image from the Internet, and try to use it on FM Towns, you must define the partition map in SRAM for it work.
   * If your SRAM battery (CR2032) is dead; this mapping is lost after each reboot and needs to be recreated   * If your SRAM battery (CR2032) is dead; this mapping is lost after each reboot and needs to be recreated
 +
 +__**SD card setup:**__
 +
 +  * Download the FM Towns boot disk image (https://nfggames.com/forum2/index.php?topic=6954.msg47665#msg47664)
 +  * Format the microSD as FAT32 (https://www.retrorgb.com/sdformat.html)
 +  * rename the image file **HD3.hda**
 +
 +Note: The filename specifies the boot disk image is a hard drive with SCSI ID 3. If you have an internal SCSI hard drive, it has SCSI ID 0. You can disconnect the internal drive and set this to ID 0 (You don't have to worry about SCSI termination with the FM Towns internal drive disconnected) For the rest of this document, we assume that your HD is SCSI ID 3. If it's something else, change accordingly the instructions.
 +
 +  * Download FM Towns 2.1 install CD image. I downloaded **[OS] Towns System Software v2.1 L51 [CD].7z** from (https://archive.org/details/neo_kobe_fujitsu_fm_towns_2016-02-25-repack_20200803)
 +  * Rename the CUE file to CD1.cue and IMG file CD1.img. Edit the CD1.cue file and make sure the first line is updated to read:
 +
 +<file>
 +FILE "CD1.bin" BINARY
 +</file>
  
  
  
fm_towns/sdscsi.txt · Last modified: 2023/10/09 12:09 by leonk