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-
- STAT-RAM 1.5 A very fast recoverable ram drive
-
- Richard Waspe 22 May 1993
-
-
- STAT-RAM or 'SD0:' is a very fast recoverable ram drive that takes
- advantage of FFS under WB2 or FFS International under WB2.1 or 3.
- This is not solely my work, but is based on ASDG-RAM, or 'VD0:' by
- ASDG.
-
- ASDG-RAM has been reliable for many years since it was placed in the
- PD. However it has always been slow because it uses OFS, or old file
- system. I have dis-assembled VD0:, converted it for use under FFS and
- made a few more adjustments. It has been renamed to SD0:, STAT-RAM to
- avoid collision or confusion with VD0:, ASDG-RAM. This is more than
- just a 'hack'. The source code has been derived by full disassembly,
- understanding, and commentry of the original. I have mailed ASDG
- asking if I could distribute this, and if I may see their original
- source, just in case I have missed something, but so far have had no
- reply. Until then it remains Beta.
-
- On an accelarated machine, SD0: is up to 7 times faster, and averages
- 5 times faster than the original VD0: . It's also 4 to 5 times faster
- than RRD. It also survives the deepest re-boot, even the ColdReboot
- of rekicking a KS file, and is the only device I have yet witnessed
- to do so.
-
- Although the device is dynamic, ram may not always be given back when
- you want it. Just run PurgeSD0 and the device is cleansed. SD0: will
- periodically purge it'self if left, but considerable ram will be
- eaten until then. Please note, that at this time PurgeSD0: *is* just
- a hack to cope with the device name change. It needs to be re-written.
-
-
- There are two versions of STAT-RAM in this Archive, according to if
- you are using WB2.04 or WB2.1 upward. Neither will work with WB1.3.
-
-
- WB2.1 and WB3.0 Users.
-
- Copy static.device.DOS3 to Devs: and rename it to static.device. Drag
- SD0 and it's Icon into Devs:DosDrivers.
-
-
-
- WB2.04 Users.
-
- Copy static.device.DOS1 to Devs: and rename it to static.device. Add
- the mountlist to your Devs:Mountlist file.
-
-
- Common Instructions
-
- Change HiCyl in the mountlist/mountfile to whatever you want, but it
- *must* be ODD. The total number of Cylinders is HiCyl+1, which
- obviously must be EVEN. The maximum size of your ram drive will be
- (HiCyl+1)*8 KBytes. Remeber this is a maximum size, and ram will not
- be used until you write files to it. When you delete files, ram will
- eventually be given back to the system. Copy PurgeSD0: into C: .
- Power down, wait at least 15 seconds then power up. You will now have
- a disk icon on the WB called STAT-RAM.
-
-
- Restrictions.
-
- This release has fixed a memory handling routine that stopped StatRam
- for working with an A4000 or A3000 if a 16 bit memory board was not
- present. It now works fine on any Amiga, *but* it's contents may not
- be stable if held in 'Ranger' or C0000 memory as used in A500 and
- A600 trapdoor ram expansions.
-
-
- History.
-
- V1.4 released 12 April 1993
-
- V1.5 released 22 May 1993
- Fixed A4000 and A3000 problem
-
-
-
-
- /* Richard Waspe - Amiga Developer
- *
- * INTERNET : waspy@cix.compulink.co.uk
- * USENET : rwaspe@hamlet.adsp.sub.org
- * FIDONET : 2:255/72.2
- */
-
-