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- Commodore 128 CP/M 3.0
- BIOS revision 5
- 6 December 1985 version
- Modified 7 May 1989 by
- Randy Winchester
-
- LEGAL STUFF & DISCLAIMER: I'm claiming no copyright on any of this
- material. I didn't write any of it myself, this is just my
- implimentation. Copyrights are held by Commodore and James Waltrip IV.
- The user of this code assumes all responsibility for all damages or
- losses, bla bla bla.
-
- This version of a BIOS for the Commodore 128 is based on BIOSR4.ARK
- from James Waltrip IV. Mr. Waltrip took care of many of the essentials
- a couple of years ago. He slashed out a lot of unneeded code and added
- a great screen dump. My revisions were to add back some of the things
- I've wanted or needed.
-
- I made modifications to the following:
-
- CXIO .ASM CXDISK .ASM
- CXKEY .ASM CXRAMDSK.ASM
- CXPRINTE.ASM CXEXT .ASM
-
- All other files in this library are unmodified from the version in
- BIOSR4.ARK.
-
- Most of my additions are to support additional hardware.
-
- * Drive D: is available (it was taken out in BIOSR4).
-
- * A Drive E: has been added. This isn't to be confused with the
- virtual disk drive in the official Commodore releases of CP/M. The
- intended purpose of this drive E: is to make an entry in the drive
- table that can be used by QD.COM for an entry for the Quick Brown Box.
- The Quick Brown Box is a 64K battery backed-up RAM cartridge. QD is a
- product of Herne Data Systems, Ltd. QD installs a driver for the Quick
- Brown Box that allows it to be used as a RAM disk. By entering the
- command: QD F/F, the Quick Brown Box is set up as Drive F:. I keep my
- favorite utilities stored there so I can have them as soon as the
- system boots up.
-
- * Definitions have been added to the disk parameter table for two of my
- favorite disk formats, 'Maxi 71' and '1581 GP'. Maxi 71 is from Miklos
- Garamszeghy's article in 'The Transactor' on adding support for more
- foreign disk formats. Maxi 71 offers an incredible 398K. Disks can be
- formatted using Garamszeghy's public domain FORMAT22 or his
- commercially available package, Jugg'ler. The latest version of
- Jugg'ler supports over 130 CP/M disk formats.
-
- * 1581 GP is a 796K format for 3.5 inch disks. Gene Pizzetta wrote
- FORMAT81 for adding 1581 disk support before the 1581 Commodore version
- was released. He did a good job. Not does his format hold more than
- Commodore's, it also seems faster than Commodore's format. I haven't
- taken the time to verify this - just try it out and see what you think.
- Disks for 1581 GP can be formatted using Gene's public domain FORMAT81.
-
- * The default LST device is now an ASCII printer, device 4. The
- secondary address has been changed to 5. This allows for transparent
- mode with the Xetec SuperGraphix interface without added line feeds.
- If you need to use a Commodore printer, replace FAST8502.ASM with the
- version found in BIOS4MOD.LBR, and replace CXPRINTE.ASM with the
- original version found on the DRI Source Code/Utilities disks.
-
- Here's the nitty-gritty, file by file:
-
- --------------------------------------------------------------------------
- CXIO.ASM
- --------------------------------------------------------------------------
- *ADDITIONS BY Randy Winchester, 5/6/89
-
- Default printer is device 4.
-
- Set up for non-flashing block cursor
-
- Search chain/temp drive: M:,*,F: [TEMP=M:]
- Drive F: is reserved for the Quick Brown Box battery powered RAM cartridge.
- The QBB is initialized with QD.COM from Herne Data Systems, Ltd.
-
- No password protection for booting the system.
-
- Colors set in sign-on message. Background=lt. gray, character=blue
-
- Default system baud rate set for 75 baud. This speeds up normal operation
- considerably.
-
- Printer names set to PRT-D4 and PRT-D5 (devices 4 and 5)
- --------------------------------------------------------------------------
-
- --------------------------------------------------------------------------
- CXKEY.ASM
- --------------------------------------------------------------------------
- * ADDITIONS by Randy Winchester, 5/3/89
-
- Added drive D: to MFM unlock routine.
- --------------------------------------------------------------------------
-
- --------------------------------------------------------------------------
- CXPRINTE.ASM
- --------------------------------------------------------------------------
- Set the secondary address to 5 to work properly with the Xetec
- SuperGraphix in transparent mode. -RW, 5/6/89
- --------------------------------------------------------------------------
-
- --------------------------------------------------------------------------
- CXRAMDSK.ASM
- --------------------------------------------------------------------------
- CHANGES by Randy Winchester, 6 May 89
-
- RAM disk is now drive M: again.
-
- Disk Label for the RAM disk has been changed back to ERTWINE VON from
- RAMDISK RAM. Not only do I believe in honoring programmers rather
- than hardware, there was no need to fuss with it in the first place.
- No need to tempt fate.
- --------------------------------------------------------------------------
-
- --------------------------------------------------------------------------
- CXEXT.ASM
- --------------------------------------------------------------------------
- CHANGES by Randy Winchester, 6 May 89
-
- Drive D: returned to active duty.
-
- RAM disk set back to drive M:
-
- Table entry made for Drive E:, used by Quick Brown Box.
- --------------------------------------------------------------------------
-
- Notes:
-
- I think the CXKYCODE.ASM file that is included with the ARKhive is
- lacking in many ways. Rather than edit the file, there are easier ways
- to include key definitions in a CPM+.SYS file. I highly recommend
- KEYFIG from the original Commodore system disk for defining the
- keyboard layout. Once you have the keyboard configured the way you
- like it, you can use KEYFIG to save the layout in your new CPM+.SYS.
- Other tools that are helpful in this regard are the public domain
- SAVEKEY and LOADKEY by Gene Pizzetta. These programs save or load
- keyboard definitions in files, and can be used to transfer custom key
- layouts from an old CPM+.SYS to a new CPM+.SYS.
-
- I'd love to add support for Commodore's "official" 1581 disk format.
- I've hacked most of it out of a copy of the 28 May 87 release, but I
- haven't been able to make it work. If anyone can show me the code to
- support the 1581, or a Disk Parameter Table entry for Commodore's
- format, please pass it along.
-
- Please make sure to read all of the documentation in this archive.
-
- If you have hints, tips, bug reports, suggestions, I'd like to hear
- them. Please write me.
-
- Randy Winchester
- P.O. Box 1074
- Cambridge, MA 02142
-
- or on The Castle, 617/825-3135
- or the BCS/KUG Zitel board, 617/965-7046
-
- or the Internet: randy@athena.mit.edu
- or UUCP: randy@athena%mit-eddie (taking your chances)
-