The KIM-1 has 2K total ROM, in two 1K maskable ROMS of the 6530-002 and 6530-003.
The 6530-002 implements a TTY interface, a keyboard interface (hence the name Keyboard Interface Monitor) and 6 7 segment LED displays.
6530-003 is an audio cassette recorder extension of the KIM monitor.

On this page binaries and source listings and assembler sources for various assemblers.

I have two sets of KIM-1 ROMs. On the KIM-1 ROM dump done by Dwight Elvey, the filler bytes (unused locations in the ROM) are filled with $00.
I confirmed the dumps of Dwight (who were faulty) by making a dump of the ROMs in my own KIM-1.

The other set, found all over the internet, is the result of assembling the source (see below) in which the assembler used $FF for the filler bytes. It makes sense to use $FF, since EPROMs can be programmed to make ‘1’s to 0’s. Functionally the filler byte is irrelevant, so I present here the ROMs with filler byte 00 (original KIM-1 dumps) and filler byte FF (assembly result).

6530-002 $1C00-$1FFF, filler bytes $FF 6530-002 ROM
6530-003 $1800-$1BFF, filler bytes $FF 6530-003 ROM

6530-002 $1C00-$1FFF, filler bytes $00 6530-002 ROM
6530-003 $1800-$1BFF, filler bytes $00 6530-003 ROM

Source code listings

Listing from the User Manual appendix
Listing from the User Manual appendix in text HTML format
Listing from the User Manual appendix in text format

Assembler sources

Source in MOS Technology format
Source in Ruud Baltissen assembler format
Source in CC65 format