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This section
provides more useful Lt. Kernal information
and programs. All of the information
is available for download and
is offered unedited from the writers'
original version:
- ltkernal.zip which contains 26 different files
including:
- scsi_pcb.jpg
, Positive CAD Artwork for the SCSI
Adapter interface board (260K)
- DB-25
connector to 50-pin Header (from
Host Adapter to SCSI
Drive)
- Connector
part numbers listed in Hard Drive
section
- scsi_pcb_rev.jpg
, Reverse CAD Artwork for SCSI Adapter
interface board (260K)
- DOS - 7.2 SYSGEN
Update
, This is the Text file contained on
the SYSGEN Disk, version 7.2, which describes
changes in version 7.2 and other important
information.
- MACINTOSH
Adapter - For those who want to use unmodified Macintosh-II
hard drive enclosures and cables (esp.,
DB-25 to Centronics-50 cable), you
can build your own DB-25 to DB-25
gender changer (like a Null Modem). For example,
- Jameco Plastic Hood - #34091CB
- Jameco DB-25M connector (to Host Adapter) - #15114CB
- Jameco DB-25F connector (to Hard Drive) #15157CB
- Use the DB-25 SCSI chart in the Drive -
Case & Cables section. (modify a gender changer or make a
short cable). Plug this Mac adapter into the
Host Adapter and a Mac DB-25/Centronics-50 cable into the Mac adapter.
Now, you can daisy-chain Mac hard drive enclosures using regular
Mac enclosures and cables. A 7-drive Lt. Kernal?
- New! - Download the Multiplexer troubleshooting
diagrams. Even if you don't own a Multiplexer unit, the schematic
and troubleshooting procedure will give you a better idea of how
the Lt. Kernal works!
- SYSGEN
Disk:
This is the SYSGEN Disk, version 7.2.
The Disk image has a Blank '87' serial
number and hard drive Cell Table.
You'll need to edit this Disk using a Sector
Editor or LTKEDIT2.SDA program following
instructions in Hard Drive - Edit section:
- New! - Complete Lt.
Kernal Manual (.pdf files in ZIP format)
- Main
portion of Manual (8.5 meg - less DOS chapters). Includes Installation
diagrams for C64/C128/C128D and Quick Reference cards
- DOS
Commands (3.1 meg - chapters 5 - 8)
- DOS Commands , A complete HTML listing of all
Lt. Kernal DOS Commands, v 7.2
- Shows
syntax of each Command
- Provides
examples for more involved
Commands
- Direct-Mode
DOS commands
- RUN-
Mode DOS
commands
- Some
Commands relate only to C128 or
CP/M
- Patch
programs, collection from Xetecs' BBS
- Some are
for LTK DOS, version 7.1
- Mod for
Skyles IEEE FLASH adapter for use with
the Lt. Kernal
- (BBS Tax
proposal - and you thought WWW would always
be Free!)
- 1581 Drive Test , This file includes a small Commodore
program and two text files. Running
this program tells you which Drive
Controller chip is installed in a 1581
disk drive (WD1770 or WD1772). There
are two reasons why you should run this
program:
- SYSGEN,
v7.1 and v7.2 adds 1581 drive
routines, which provides for
Restoring and Backup of files
to/from the 1581 and Hard Drive. But
Xetec recommended that the drive
should included the Western Digital
WD1772 controller chip (as tested by
Xetec) (I've tried both controllers - both
work)
- Commodore
provided a free upgrade to modify
the 1581 with a newer WD1772
controller chip. This modification
was needed to fix a bug in some
1581s and to improve drive
performance and reliability. The
Commodore upgrade also added a
resistor and fixed a potential
soldering problem.
- The
included Text files explain the
program and what the Commodore
Upgrade involved (if you want to
check your drive).
- Integrated
Circuit Datasheets , The following Host Adapter
IC Data Sheets may be useful for troubleshooting.
These are in PDF file format, which require
Acrobat Reader to view/save:
- MC6821
- PIA , Peripheral Interface Adapter
(U3)
- 74LS245 - 3-State Octal Bus Transceiver
(U4)
- 74LS244 - Octal 3-State Buffer/Line
Driver/Line Receiver
(U5)
- 74LS38 - Quad 2-Input NAND Buffer
(U6)
- 6264
- 8K x 8 Static RAM (U8, U9)
- 74LS74 - Dual D-Type Flip-Flop
(10)
- P5C032-25 - New! - 8-Macrocell
CMOS PLD (PLD-1.0 and PLD-2.0)
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