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Thread: Kaypro 2X HELP.

  1. #11
    Join Date
    Nov 2017
    UK, South East
    Blog Entries


    Maslin archive has the ROM image for your system here:

    It also has alternative (including stock) EPROM images there if you do decide to burn one and replace your MAX ROM.

    The archive also has the boot disk image here:

    Have you tried dumping the Pro-884-MAX disk image to a floppy and booting that ?

  2. #12
    Join Date
    Mar 2013
    Chaffee, MO


    Here are the Pages of the MC ROM's that I OCR'd and verified.

                     ROM'S from Micro Cornucopia
    The are are two ROMs in each Kaypro, a monitor ROM and a character ROM.
    The Monitor ROM supplies information for the Z80 processor on such
    things as how to get information from the disk drives, and which character to
    use as a cursor. The character ROM works entirely in the video circuit and it
    determines what the characters look like on the screen (for instance, does the
    "f" have a high, small cross bar, or a lower, longer one of the Micro C
    character ROM).  When you speed up your Kaypro, you are speeding up the
    processor clock so you have to use a monitor ROM that will also run at the higher speed. You are not
    changing the video clock when you speed up the Kaypro so you don't need to change the character ROM
    (unless you want the nicer looking character set).  Since the monitor ROM tells the processor how to do disk
    accesses you are going to have to change that ROM in order to upgrade to larger drives.
    Pro-Monitor II for Kaypro II
    1. This ROM is a fast part so you can run 4 or 5 MHz with your Kaypro II.
    2. It gives you a non-blinking block cursor (much less irritating), though you can specify a standard blinking
       underline if you prefer it.
    3. It does faster disk accesses (even if you don't speed up your system).
    4. It throws away null characters (those little asterisks that sometimes garbage the screen during data
    5. Includes complete printed instructions for simple plug-in installation (takes 5 minutes).
    Pro-Monitor 4 for Kaypro 4
    This ROM does everything the Pro-Monitor II does, only it's for a Kaypro 4. Though the ROM that comes in
    your Kaypro 4 will run 4 or 5 MHz (unlike the ROM that comes in the II), this ROM also gives you:
    1. Non-blinking block cursor.
    2. Faster disk accesses.
    3. Throws away null characters.
    4. Complete printed instructions simple installation (takes 5 min).
    Pro-Monitor 8 package for Kaypro 4
    This ROM package does everything the Pro-Monitor II and 4 do (it will run at 5 MHz, ignores nulls, has the
    fast disk accesses). In fact, even if you will be using your original 191K or 390K drives for now, you can use
    this ROM package. The Pro-Monitor 8 features include:
    1. You get 784K per disk with quad density (96 tpi, double sided) Tandon 100∑4 (or equivalent) drives
    2. You can use any combination of Tandon  100-1 (Kaypro II), 100-2 (Kaypro 4), or 100-4 drives as drives A and B
    3. You can boot from any disk with normal system tracks (Kaypro II, Kaypro 4, or Kaypro 8). The disk
       needs no modification.
    4. You can choose any character (including space) as a cursor and you can choose to make the character
       blink or not blink. Plus, you can change the cursor at will.
    5. You get a disk which contains a new copy routine for copying and formatting 784K disks, and a drive
       diagnostic routine for checking out the quad density drives.
    6. You get complete printed instructions for installation of ROM and drives (takes 10 to 15 minutes,
       including drives).
    7. The installation requires no cuts or jumpers, everything simply plugs into a Kaypro 4. (If you have a
       Kaypro II, see the modification article in Micro C issue  15 to turn your II into a 4.)
    Pro-Character ROM (for Kaypro II and 4)
    The character ROM gives you a nicer looking character set.  Kaypros have come with two different character
    ROMs, the early character ROMs had a rotten g, y, q, f, and t as well as commas and semi-colons that were
    hard to tell from periods and colons. On the newer systems (manufactured since Sept 83) half of the
    characters (notably the g) have been improved, but they haven't gone all the way.
    Also, many of the older character ROMs were poor quality parts so they generated snow as information
    scrolled up the screen. This white flecky snow disappears when you install a Pro-Character ROM.
    The character ROM comes in two flavors:
    1. The standard Greek Pro-Character has the nicer character set plus the standard Kaypro Greek characters.
    2. The Clean Pro-Character has the nicer character set but no Greek characters. This is the ROM for people
       who get strange Greek characters on the screen when interfacing with Mainframe systems.
    3. Complete printed instructions for simple plug-in installation (takes 5 minutes).
    Note: These ROMs will not work in the Kaypro 10 or the latest Kaypro 4 with graphics (it contains the
    Kaypro 10 board). We are working on new ROMs for these systems.
    Pro-Monitor II                                              29.95
    Pro-Monitor 4                                               29.95
    Pro-Monitor 8 (package)                                     49.95
    Pro-Character (either Greek or Clean)                       29.95
    Pro-Set II (Pro-Monitor II & Pro-Chracter)                  55.00
    Pro-Set 4  (Pro-Monitor 4 & Pro-Chracter)                   55.00
    Pro-Set 8  (Pro-Monitor 8 package & Pro-Chracter)           70.00
       SPECIAL PR0-884 NOTE:
    The Pro-884s are sensitive to the version of CP/M you are running.
    1. Neither the Pro-884 nor the Pro-884 Max will run on
    CP/M 2.2U. How-ever, if you can locate a CP/M 2.2F or
    2.2G system disk (your dealer should have a copy) You
    should be able to run our 884 monitors. (Don't try to boot
    F or G before you change monitors.)
    2. There are two distinct versions of CP/M 2.2G. Only the
    Pro-884 Max is sensitive to the version of 2.2G you have - it's
    the ZCPR in ROM that's the problem. (If you have CP/M 2.2F
    then you have a Normal CP/M.) So, before ordering the Max,
    boot up your original system disk and read the sign-on. If it's
    CP/M 2.2G then we need to know whether it's the high (normal)
    version or the low (minus) version.
    To determlne your G version (you'll become a G  Whiz!):
    A DDT cr
    L5 cr
    (ddt's response)
    The first line of the response will be a JMP D600 or a JMP D800.  The
    JMP D600 means that you have a low (minus) version, and the JMP D800
    means that It's a normal version.  When you order your  Pro-884 Max, be
    sure to specify whether you want the normal Max or the minus Max. Other-
    wise, we'll just guess that you need the normal Max.
    Pro-8 Version 2 for Kaypro 4
    Guess what we've just upgraded. The venerable Pro-8 now has a
    version 2 and it's really neat! The new features include:
    1. Screen dump with selectable dump character.
    2. Select slow or fast step rate for each drive.
    3. ROM that automatically figures out what type of drive you are using.
    4. No more delays when using both single and double sided disks.
    5. And, it's still only $49.95 for ROM, disk, and manual!
    Of course, you get all the original Pr0-8 features such as:  user
    selectable cursor (blinking or not), ignores nulls, and your choice of 1-4
    drives of the 191K, 390K, and 784K variety. (Use of 3 or 4 drives
    requires drive decoder.)
    Installation requires no cuts or jumpers. The ROM simply plugs into a
    Kaypro 4-83 (or II-83 with a Kaypro 4 processor board). If you have a
    Kaypro II with the original II processor board then you must do the II
    to 4 upgrade. See issue #21 for details. Your Kaypro II has the original
    II board if the monitor ROM (a 20-pin chip with paper stuck to its top)
    is marked with 81-149. The 4 ROM is marked 81-232.
    If you already have a Pro-8, you can upgrade to version 2 for half price.
    Call or write for details.
    Pro-884 Monitor
    The long-awaited PR0-8 ROM for the Kaypro 2-84 and 4-84s is ready!
    You have not saved your nickels and dimes in vain!
    The PR0-884 ROM does everything your old Kaypro ROM does, plus it:
    1. Gives you 784k bytes of storage per disk (with quad-density 80-track, double-sided drives).
    2. Uses any combination of Kaypro II, IV, or quad-density drives.
    3. Includes software to let you format and copy II, IV, or quad-density disks.
    4. Comes with complete printed instructions on ROM installation and tips on installing quad-density drives.
    5. Runs up to four drives with the Plus-4 Decoder Board.
    Installation of ROM takes just five minutes and requires no cuts or jumpers.
    Pro-884 Max Monitor
    The ROM that does everything but wash the dishes is here! There's so
    much stuff in this ROM, even we didn't think it would fit!
    The PR0-884-MAX ROM does everything the PR0-884 does, PLUS IT:
    1. Emulates a DEC VT-52 or Heath H-19 video terminal (both the display and keyboard).
    2. Does FASTER screen output.
    3. Has ZCPR1 in ROM, eliminating the need for a system disk in drive A: during a warm boot.
    4. Dumps the screen to your printer at the touch of a single (user definable) key.
    5. Sends characters going to the screen to your printer regardless of the program you are running.
    6. Displays the time on the Kaypro's status line (Kaypro 4-84s only).
       Because of battery backup, the time does not have to be re-entered each time you power up.
    7. Inserts the time and date into text while you are running your favorite text editor (4-84 only).
      Pro-8 Version 2 Pkg.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49.95
      Pro-884 Pkg.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59.95
      Pro-884 Max pkg.  . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . .79.95

    I wasn't able to find a good article on the MAX ROM as of right now.

    Last edited by ldkraemer; May 29th, 2019 at 08:03 AM. Reason: typo

  3. #13
    Join Date
    Mar 2013
    Chaffee, MO


    In the Photo you posted:
    I noticed that IC U44 is missing. That happens to be the Floppy Disk Controller. And since it is missing, you need
    to locate a replacement 1793 FDC and inset it in the IC Socket. I checked Jameco and All Electronics and they are
    no longer stocked at both places. You should be able to find one for less than $10.00 on Ebay, or perhaps someone
    knows of a good source for older parts.

    Once you have a good 40 Pin WD1793 FDC it should at least try to communicate the the Floppy.

    Last edited by ldkraemer; May 29th, 2019 at 11:17 AM. Reason: added WD

  4. #14
    Join Date
    Mar 2013
    Chaffee, MO

    Default Mb8877a fdc

    It appears that the Fujitsu MB8877A Floppy Disk Controller (DIP40) is a good replacement for the WD1793. I found a posting on VCF
    that said the WD1793 uses +5 and +12 for the WD1793, while the MB8877A only uses +5 VDC and the +12 Pin is not connected to
    the MB8877A.

    A source is ebay for the Fujitsu MB8877A Floppy Disk Controller (DIP40)

    So, while they aren't CHEAP, they can still be purchased.

    Look around inside your Kaypro, as if it came out in shipment, it could be laying somewhere inside the Kaypro.
    You might want to carefully turn it upside down, and see if the WD1893 re-appears.

    If you decide to use a different EPROM in the Kaypro, I can program the contents as long as you pick the file you
    want burned. My old BP Microsystems EP1 will easily do that.

    But, I'd try the current ROM to see exactly what it does for you. You might just like it after you have the Kaypro running.

    What's your status/decision?

    Last edited by ldkraemer; May 31st, 2019 at 04:42 AM.

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