The KR1801RE2 ROMs are special ROM types. They differ from usual (e.g. i2716) by their interface which is almost Q-BUS. These are produced for series of CPU boards of MS1201.01/02/03/04 (corresponding CPUs: KR1801Vm1/2/3). Those processors don't have internal microODT inside, they use special signal SEL to indicate they want to access external HALT-mode ROM. Please find images of such ROMs in attachment. The images was made by STERH series programmer and Sterh studio programming software. This software includes useful feature address\data invertion (remember QBUS signals are inverted). You need invert rom images yourself if you want to disassemble them. Also there is 1 extra 16-bit word in the end of image file (This is the way of keeping "ROM address configuration" which is included in an KR1801RE2 ROM device. The device is capable of monitoring 3 address lines and answer to Q-BUS according to programmed internal address configuration bits.)