no its not one of those..
K4X ROM upgrade for '84 Kaypros by Barry A. Cole 13MAR88
-------------------------------------------------
INTRODUCTION:
This is a public announcement of a major set of enhancements for Kaypro
'84 model CP/M computers. An upgrade to the EPROM with disk and
instructions sells for $50 +6.5% CA tax. A full 10MB internal
subsystem sells for $275 + tax. I believe this is easily the fastest
and lowest cost enhancements you can buy if you own any of this series
of machines. I am active on this RCPM and also on betaline(213-313-2549),
if you would like further information.
COMPATIBILITY:
The K4X EPROM is a direct replacement for the program EPROM in all '84
model CP/M Kaypro computers. These are easily identified by the presence
of 2 serial ports on the back panel. This will replace the program EPROM,
and is therefore mutually exclusive of other upgrades such as the Advent
turborom.