Dual booting the Replay & the Amiga with a single SD card partition

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This is what you need to get this done.

  1. 1 Replay board Flashed with ARM FW 20170615+ and recent a Amiga core w/ 3.0+ ROM.
  2. 1 SDCARD of reasonable size – I used an 8GB SanDisk SDHC Class 10 card for this.
  3. Workbench 3.0/3.1 in .ADF format
  4. P96 installation from http://classicwb.abime.net/
  5. AddReplayMem command, Picasso96 RTG and AHI driver from this forum / the repository (strictly speaking optional, but.. 😉
  6. FAT95 from Aminet (optional, but the version from ClassicWB is a bit older it seems)

This can be done completely without using WinUAE, but it might be faster to do it on your host PC.

1. Prep and format the SDCARD with MBR (not GPT/GUID) and an _aligned_ FAT32 partition.

I used ‘gparted’ on my Linux box to control both alignment of the partition and make sure the first cylinders were zeroed out but system partitioning and formatting tool in Windows and OSX are believed to most likely do the right thing.
$ sudo dd if=/dev/zero of=/dev/sdd bs=8192

2. Copy the latest replay_amiga.bin + replay.ini and Kickstart ROM to the root of the SDCARD

Edit the replay.ini and make sure it’s using 68020, XRAM, P96 etc is all enabled and that the ROM=<filename> matches the filename of the ROM.
Then double check that the replay can boot the SDCARD.

3. Continue to copy the Workbench .ADFs, the ClassicWB P96 System.hdf and all the Replay+Aminet drivers/tools to the root of the SDCARD.

Edit the replay.ini and add

chb_mount = “System.hdf”,0
chb_mount = “?mmc”,1

at the end (make sure no other ‘chb_mount’ lines are active). This will attach the ClassicWB image as master and the whole SDCARD as slave.

4. Insert the SDCARD in the Replay and boot. Follow the on-screen instructions how to activate using the WB ADFs.
5. Assuming everything went OK we now have ClassicWB booting up (but complaining about ‘uaegfx’),
just go ahead and remove uaegfx from DEVS:Monitors/.
6. Now you can go ahead and install the AddReplayMem and RTG driver, if you got them in .ADF format. Otherwise hold on.
7. Open a Shell and run:

3.System:> Stack 131072
3.System:> GiggleDisk scsi.device 1 prefix FAT mountdos

You should get this output:

GiggleDisk (c)2005 Guido Mersmann

0, DosType: 46415401, LowCyl:       2048 HighCyl: 15521792, Size: 7 GB, FileSystem: L:fat95
Mounting ‘FAT0:’

8. If you wish you can now update FAT95 with the latest version and/or install the Replay additions.
9.Take some time and browse the FAT0: – It should ‘just work ™’.
10. If everything looks fine then open a Shell and run

3.System:> boot95 FAT0:

This will write the FAT0: partition setup to the RDB (starting with the second block of the SDCARD, leaving the MBR (at block 0) intact).

11. Confirm that the RDB was written correctly by rebooting into the Amiga Early Startup Control, and inspect the Boot Options.

Attempting to boot from FAT0: at this point will get you nowhere – we need to copy the whole System.hdf to FAT0:

12. Boot to Workbench again, and start DirectoryOpus. Select the entire content of SYS: and copy it to FAT0: (this will probably take a while)
13. Reboot into the Amiga Early Startup Control, and choose to boot from FAT0:
14. Launch whatever text editor is available from Workbench and open FAT0:REPLAY.INI

Change the HDD mounts to:

chb_mount = “?mmc”,0
#chb_mount = “System.hdf”,0

Save and either reload the replay.ini or power-cycle the Replay board. Simply rebooting the Amiga will not suffice.

15. The Amiga should now boot directly from the SDCARD. Continue to copy the Workbench .ADFs, the ClassicWB P96 System.hdf and all the Replay+Aminet drivers/tools to the root of the SDCARD.
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