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--- blog:bbc_riscpc_fix [2020/07/26 11:44] – john
+++ blog:bbc_riscpc_fix [2020/07/28 19:05] (current) – john
@@ Line 106: / Line 106: @@
 ===== Re-Testing After Battery Removal =====
+I reassembled a minimal system:
+    * Power supply
+    * Main board
+    * StrongARM processor
+    * 8MB SIMM
+    * VRAM SIMM
+{{:blog:img_1552.jpg?400|}}
+Pressed the power button holding 'Del' (CMOS reset routine for the Acorn) and crossed my fingers:
+{{:blog:img_1549.jpg?400|}}
+Hurrah!
+At this point it wouldn't boot to the desktop, so I tried hooking up the disc drive and gave it a reset:
+{{:blog:img_1550.jpg?400|}}
+Even better! There seems to a working OS install on the drive as I saw various messages about plugins and toolboxes being loaded from the drive. Sadly it didn't give me a fully working desktop as it eventually threw this error in my face:
+{{:blog:img_1551.jpg?400|}}
+To be honest I'm not surprised an old 800MB IDE drive from-gods-know-when has a few errors. The plan would be to swap it out (or, preferably, leave it installed but unplugged) with a compact flash card reader instead.
+===== Case cleaning! =====
+Just a bit of soap and water and a magic eraser block:
+{{:blog:img20200726184832.jpg?400|}} {{:blog:img20200726184955.jpg?400|}}
+===== Restoring Risc OS =====
+It's been a long time since I've done it, so this is also for my own peace of mind.
+=== Steps to reinstall Risc OS to hard drive ===
+   * Unzip the {{ :blog:splug226.zip|!SparkPlug}} zip file, and copy the self-extracting .bas file to a DOS floppy
+   * Run SparkPlug from RAM
+   * Copy {{ :blog:hform248.zip |!HForm.zip}} to a DOS floppy
+   * Unpack !HForm to RAM
+   * Format your new drive, make it bootable
+   * Copy !SparkPlug to the formatted hard drive
+   * Copy {{ :blog:split.zip|!Split.zip}} to a DOS floppy
+   * Unpack !Split.zip and copy to your formatted hard drive
+   * Use the MS-DOS {{ :blog:split_stubsg.zip|SPLIT.EXE}} on the PC side (included in addition to versions for other platforms) to split the Risc OS 3.7 {{ :blog:uniboot.zip|universal boot sequence}} into two 1.4MB images ({{ :blog:uniboot_splits.zip|pre-split version}})
+   * Copy each image on a single DOS floppy to the Risc PC
+   * Re-join the two split files using !Split and drag the unzipped !Boot sequence to your hard drive
+{{:blog:img_1554.jpg?400|}} {{:blog:img_1556.jpg?400|}}
+All working, but for some reason at 1024x768 either my OSSC or monitor cuts off a good chunk of the left hand side of the screen:
+{{:blog:img_1557.jpg?400|}}
+... one more thing to look at!
+===== Networking =====
+To do!