Yes, old but the best Fullscreen Assembler/Debugger I've ever seen. Small, simple and very effective. Covers 86 and 286 only. An excellent learning tool.
Ketman ASM Maximaster
(Popularity: ) : Complete ASM Toolkit (real mode) for both beginners and advanced programmers, comprising assembler, debugger and assorted tools. Also contains unique ASM interpreter, allowing unassembled source text to be single-stepped . Is also unique in allowing both interpreter and debugger to ... ASSEMBLY language tools collection containing
(Popularity: ) : Assembly language reference guide,symbolic debugger, Interactive 8086 Disassembler,