On Wed, Nov 14, 2018 at 8:53 AM Ethan Dicks via cctalk < cctalk@classiccmp.org> wrote:
> On Sat, Nov 24, 2012 at 4:08 AM Eric Smith <e...@brouhaha.com> wrote: > > I spent some time reverse-engineering the firmware. There is only one > > undocumented opcode, decimal 10, and I haven't yet figured out what it > > does, but it definitely doesn't format a tape. > > I looked at the firmware disassemblies. Opcode 10 appears to only > point to code (vs NOP) on one version of the firmware > > > https://gitlab.com/NF6X_Retrocomputing/tu58firmware/blob/master/disassembly/23-089e2.asm Well, yes, that's my disassembly. So now you know about as much about opcode 10 as I do. :-)