The KIM-1 has 2K 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 extention 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. One set is the original KIM-1 dump by Dwight Elvey, in which the filler bytes (unused locations in the ROM) are filled with $00.
Alas the dumps by Dwight have a couple of bit errors and the NMI vector is wrong.

The other set is the result of assembling the source (see below) in which the assembler used $FF for the filler bytes. Makes sens to use $FF, since EPROMs can program ‘1’s byte for byte later to 0’s.
Functionally the filler byte is irrelevant, so I present here the ROMs with filler byte 00 (corrected Dwight 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