Alberto Gonzalez 4d ago
Grant Me Strength

Retro computer enthusiasts: you might find this CPU opcode app useful. Please let me know of errors and omissions!

On TestFlight for iOS now. Requires iOS 18.

https://testflight.apple.com/join/e3nSMedK

Z80, 6502, 6800, 6809, 8080, 1802, 2650 and 8088.

Mar 7 at 11:06pmWeb
Show threadRandy "DUO" MongenelMar 7
@GrantMeStrength Error: the Z80 was not used in the Nintendo Gameboy. It uses a mostly similar CPU from Sharp that we call the SM83. Opcodes are not quite the same, missing hardware, adds stuff.
Show threadGrant Me StrengthMar 7
@RandyMongenel noted!
Show threadRandy "DUO" MongenelMar 7
@GrantMeStrength You could say the SM83 was inspired by the Z80 and 6502. It has a zero-page like area at the top of memory, accessible with shorter opcodes. No shadow registers or index registers. I/O is very different. Added a nybble swap opcode. But yeah, most Z80 coders would be both comfortable and frustrated by it.
Show threadRairii   Mar 7
@GrantMeStrength slight error in the screenshots: the cpu in the game boy is not a z80, it's a Sharp SM83, the instruction set is different
Show threadGrant Me StrengthMar 7
@Rairii fix coming! Thanks.
Show threadSteckschweinMar 8
@GrantMeStrength Only runs on iOS 26 as it seems
Show threadGrant Me StrengthMar 8
@steckschwein_6502 updated it. Please try again.
Show threadSteckschweinMar 9
@GrantMeStrength It works now! Awesome, thank you!
Show threadweirdocollectorMar 8
@GrantMeStrength Android please šŸ˜Š
Show threadMatt LewisMar 8
@weirdocollector @GrantMeStrength If it's the Z80 that you're interested in, there's a Z80 opcode reference app for Android by @bitsofbas here: https://mstdn.social/@bitsofbas/116142091114704126
šŸ…¼šŸ†‚šŸ†‡ bitsofbas (@[email protected])

My Z80 Opcode Calculator app on Google Play was updated yesterday. Undocumented opcodes are now included. Test away! #z80 #msx #zxspectrum #amstrad https://play.google.com/store/apps/details?id=z80opcodecalculator.bitsofbas.com

Mastodon šŸ˜
Show threadweirdocollectorMar 8
@semiprime @GrantMeStrength @bitsofbas Thanks! I also do some 6502 and less frequently 6809, and it would be really great to have your app also on Android. Thanks again!
Show threadUlrich HoffmannšŸ––Mar 8
@GrantMeStrength would like to run and test it on iOS 18 but seems to require newer iOS, so canā€˜t. šŸ™
Show threadGrant Me StrengthMar 8
@honuk try again!
Show threadloptaMar 8
@GrantMeStrength I miss my old paper Z80 programmer's manual. Did my first machine code with that, pencil & paper and a Sinclair Spectrum.
Show threadGrant Me StrengthMar 8
@lopta you donā€™t have this on a shelf?
Show threadloptaMar 8
@GrantMeStrength I've definitely seen that but I don't own a copy.
Show threadKlas OlssonMar 8
@GrantMeStrength Thank you!
Show threadAndrewFMar 9
@GrantMeStrength Thatā€™s great! Like one of these little spiral-bound lookup manuals turned into an app.
Show threadAndrewFMar 9
@GrantMeStrength I use https://clrhome.org/table/ for z80 opcodes. And I like the direct access of thatā€” that you can see al the instructions at once. What would be lovely in your app is a similar modeā€”even if it wasnā€™t very readable til you press to zoom in.
Z80 Opcode Table

Show threadGrant Me StrengthMar 9
@andrewf I do have this mode..
Show threadAndrewFMar 11
@GrantMeStrength Yeah, I noticed that, nice! Would be cool if that was a ā€˜modeā€™, so when you go in to view an instruction, then press ā€˜backā€™, you get to the same view.
Show threadMattMar 11
@GrantMeStrength @stroughtonsmith wow this is awesome!!!
Show threadMattMar 11
@GrantMeStrength installed and I love it. Hope you eventually add some more (notably 68k) but even if you never do this app is still unbelievably good. The presentation is perfect.
Show threadGrant Me StrengthMar 11
@apple4ever glad you like it! Iā€™m trying to decide on keeping all the 16 bit + CPUs for another app, or make just another ā€œmodeā€ on this one. Iā€™ve already made a separate app for DECā€™s PDP mini and mainframes to better suit their odd architectures.
Show threadMattMar 11
@GrantMeStrength I was thinking about that too that the presentation might have to be different for 16bit +. I mean addressing modes alone is a change. I can an argument for both sides.
Show threadGrant Me StrengthMar 11
@apple4ever check the latest beta as Iā€™ve started adding 16bit CPUs. If you change the opening view to tiles it works pretty well!
Show threadMattMar 12

@GrantMeStrength whoa tile view is coooooooool. And there is the 68K :)

This is really well done for a beta!

Show threadAndrewFMar 11
@GrantMeStrength This really is lovely. Was this app to scratch a personal itch? Or an experiment?
Show threadGrant Me StrengthMar 11

@andrewf Iā€™ve been messing with so many CPUs (thanks, 8BitForce!) I needed a tool to help me.

https://www.tindie.com/stores/8bitforce/

8-Bit-Force on Tindie

An electrical engineer who grew up during 1980's and spent much of his childhood hacking commodore computers. Now building 8-bit microprocā€¦

Tindie
Show threadAlberto Gonzalez 4d ago
@GrantMeStrength it is great!