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Last revision of this page: January 25, 2025

• Collection No. 0 - Thomas Brase
• Collection No. 1 - Chris Singleton
• Collection No. 2 - Frank Rahman
• References

... in progress ...

Kaypro II ........ #004-037

Please follow this link.

Kaypro II ........ #010-408

Kaypro II ........ #034-126

Build date: The most recent TTL chip is dated 8250. The Z80B CPU (6 MHz) is of course newer (8337), because the mod was done later.

Following the known Kaypro II mods. Above the speed mod: 2,5 or 5 MHz. Below left the CAS/MUX mod and below right the drive fix mod.

The Kaypro 2 to 4 mod is not performed. This Kaypro II uses still two single-sided, full-high Tandon TM-100-1A drives.

The builder of this speed mod was just brilliant. By simply plugging it in, you can switch between 5 and 4 MHz. Much better than the construction in the Micro Cornucopia!

Kaypro II ........ #034-644

Kaypro 4/84 ...... #116-866

This Kaypro 4/84 looks almost flawless on the outside. The keyboard has apparently never been used. Only the two Epson drives are not in order; I have replaced them with two Toshiba 5401 and 5426. This Kaypro 4/84 also runs perfectly with a hard disk!

Kaypro 10('83) ... #097-876

Kaypro 10('83) ... #111-192

Robie ............ #252-887

Please follow this link.

Courtesy of Chris Singleton, Duncan, British Columbia, Canada / [cchhrriiss11] from "Vintage Computer Federation Forums".

Kaypro 4X ........ #205-824

In the following picture you see a Kaypro 4X with two (working) 2.6 MByte Drivetec drives. This is the ONLY Kaypro 4X I have seen on the internet so far.

----------------------------------------------
Model   CP/M    MB      ROM       ROM
        version version revision  version
----------------------------------------------
4X      2.2G    81-297  81-326-E  1.7R
4X      2.2H    81-297  81-326-E  1.7R
----------------------------------------------
I do not know the correct CP/M version.
----------------------------------------------

Kaypro 10's

In the following picture you can see the mainboards of four Kaypro 10. The top row are 10 ('83) models with the mainboard 81-180C. The row below are 10 ('84) models with the universal mainboard 81-582.

----------------------------------------------
Model   CP/M    MB      ROM       ROM
        version version revision  version
----------------------------------------------
10      2.2G    81-180  81-302-C  1.9E
10      2.2UL   81-582  81-478-A  2.01
----------------------------------------------

Kaypro serial number from left to right / top: #48137, #123510 / below: #125065, #270274. The bottom left Kaypro 10 has a TurboROM '84 v3.4 BIOS.

Courtesy of Frank Rahman, Springfield, Illinois, USA

I [Frank Rahman] currently have 19 CP/M based Kaypro machines. The earliest serial number I have is 2775.

- Of the II or 2s I have 13. (One is a Plus 88)
- Of the 4s I have 4. (One is a Plus 88)
- Of the 10s I have 1.
- Of the 1s I have 1.

Kaypro II ........ #002-275

This Kaypro II is one of the very first with the full-high floppy disk drives vertically arranged.

With factory drive fix mod.

--> Go to Part 0 : Information
--> Go to Part 1 : Versions
--> Go to Part 2 : Hardware
--> Go to Part 3 : 8K EPROM Modification
--> Go to Part 4 : Formatting a Hard Disk
--> Go to Part 5 : USER areas
--> Go to Part 6 : MASMENU - Master Menu
--> Go to Part 7 : Terminal
--> Go to Part 8 : KayPLUS ROM
--> Go to Part 9 : Advent TurboROM
--> Go to Part 10: Multicopy Plu*Perfect
--> Go to Part 11: The Kay Family & Company
--> Go to Part 12: Kaypro Design Views
--> Go to Part 13: Micro Cornucopia
--> Go to Part 14: Repairing a Kaypro II
--> Go to Part 15: Kaypro Collections
--> Go to Part 16: Kaypro General
--> Go to Part 17: Kaypro Robie
--> Go to Part 18: MFM-Emulators
--> Go to Part 19: Roadrunner ROM
--> Go to Part 20: Software
--> Go to Part 21: FAQ
--> Go to Part 22: Kaypro Virtual
--> Go to Part 23: Formatting a Floppy Disk
--> Go to Part 24: ROM, EPROM
--> Go to Part 25: Kaycomp