| FileStore E01
| FileStore E01S |
| |
| The Winchester disc interface is essentially a 1MHz bus running at 2MHz;
the SCSI controller resides within the E20 expansion.
| The harddisc interface is included on the main board, providing a
SASI/SCSI interface on the rear of the server.
The E40S and E60S harddisc upgrades are little more than Rodime SCSI
harddiscs and a power supply in a box... |
| |
| As a consequence of the above, it is usual that E01 servers only
have one harddisc expansion. More are possible, but it is tricky.
| As a consequence of the above, expanding the FileStore is possible by
simply adding harddiscs to the daisy-chain arrangement, up to a maximum of four
units, in any order (a potential maximum storage of 241.2Mb (60Mb × 4 + 1.2Mb (2
× 600Kb floppies)). |
| |
| Earlier versions of the server code used the old-style date
(see here for details) and may fail on dates after 1996.
| As far as I am aware, there are no date problems with the FileStore
until the end of time in 2108. |
| |
Various internal differences:
- No on-board SCSI interface - but you already knew that.
- The firmware is split into two ROMs - one holds the server and the other holds the
OS.
- The front flap sensor is 'read' using the VIA.
- VIA port B is hooked to a set of links to provide a
Net ID.
| And the E01 differences are...
- On-board SASI/SCSI interface.
- The firmware is contained in a single 64Kb ROM.
- The front flap sensor is 'read' using a latch mapped into memory.
- VIA port B is unused. There is no Net ID in the E01S.
|
The above may not be correct for all versions of the
E01,
it seems the schematic in the service manual does not match some of them! |
| |
| The internal clock is reputed to have a habit of 'interfering' with an
existing clock.
| The internal clock is better behaved. |
| |
| The command set is similar to the Level 3 server; i.e.
MaxUser and Report; but only
if you have an older version of the firmware. It appears as if later firmware makes the
commands E01S-like.
| The command set has been rationalised into something more specific
to the server (less likely to clash with extension ROMs, etc) - generally by prefixing
"FS" in front of things; i.e. FSMaxUser and
FSReport. |