A couple of do-it-yourself hardware addons for the old short model Atari ST(M)
Free but comes with no warranty.
STBlitter_RevA:
https://github.com/agranlund/STBlitter_RevA
Blitter + IDE + TOS 2.06 decoder
STBlitter_RevC
https://github.com/agranlund/STBlitter_RevC
Blitter + IDE + TOS 1/2/3 decoder + STGA interface for ET4000 graphics card
STRam:
https://github.com/agranlund/STRam
4MB RAM upgrade
STRom:
https://github.com/agranlund/STRom
Eprom + realtime clock board
