Eagle

512kB

Looks OK. Should be $FF (my a7800 is ver. 4.0 ) I'm attaching version with resetting SKCTL (writing $03) PokeyTesterReset.a78

RND Pokey should show $FF without reset (tested on real Pokey and PokeyMAX) After reset $xxxF RND should show random numbers. A7800 is showing random numbers without resetting Pokey (at least my version, I didn't check new one) JS7800 act this same, prosystem not at all. BupSystem seems ok but for $4000 address if I remember correctly (must do more tests) Attaching my old tester (joy/select/start/help). RND is in right bottom corner. PokeyTesterNoreset.a78

2xPAL 1xNTSC no mods

2 more

All credits to Rafal, not for me.

Song converted from YM2149F.

If you know how to test Pokey RND you can block almost all emulators as well but why....?

Tiles/level data/Title graphics don't need Holey DMA Holey DMA you can only use for $Axxx $Cxxx $Exxx You can't change bank $C000-$FFFF so you have only left $Axxx and sometimes wasting $8xxx 9xxx and $Bxxx when you change $8000-$BFFF This cart can change 4KB banks Axxx $Cxxx and $Exxx independently Flipping and Mirroring is just extra features (because why not ) I asked @rj1307 to help me design cart 32KB + SN But we ended with this

Camanis by @miker You may hear some sound artifacts at the beginning of the song. Unfortunately there is no music editor for SN + Covox so Miker had to improvise with Furnace and export two different systems to one VGM. Cart is almost finish, few more tests left.

@Trebor Is there any significant differences between A8 and A7800 Pallet? (NTSC/PAL) Both looks almost this same to me.

Not yet. Just Wsync for now. Vgm data is about 3-8 bytes per frame so no problem at all to play on DLI But in future I will use Huffmunch for VGM data and partially play Covox on DLI an CPU.

Almost done. I tested on Dragonfly Also @Trebor tested on MCP, Concerto and MiSTer (concerto has some problems with sound at $450 but I will fix this) Need to do some better Title screen and ending. Also graphics is 4 colors for now and no animation (animation was copied to the chars). But probably I will upgrade to 25 colors and use direct mode. I'm looking for graphicians. Maybe @TIX @Defender_2600 ? Anyone who is interested? Please PM me https://en.wikipedia.org/wiki/Robbo_(video_game) see video bellow from A7800 emulator: A7800_ Atari 7800 (PAL) Cool [a7800p] 2022-04-23 19-08-10.mp4

I would also like to say that the cart is compatible with @Sikor A7800 cases.

Maybe @miker will answer for some of your questions. I have no idea about music

32k RAM +256k ROM +SN +COVOX and some very useful features Yes It's working but need lots of testing Below one pattern plus Covox recorded from realhw Miker_SN_covox.ogg

Small update about progress

Some time ago I did Hscroll for A7800 using Ring Buffer and Turrican 2 level from Charpad Pro. Map is 2400 chars long and 20 chars high (unpacked data is 48KB for this level). But converted to 4x4 tiles is only 3KB. Turrican online emulator A7800 https://raz0red.github.io/js7800/?cart=https://atariage.com/forums/applications/core/interface/file/attachment.php?id=899031 code examples https://codebase64.org/doku.php?id=base:extract_row_from_tile_based_map http://www.atari.org.pl/forum/viewtopic.php?pid=199838#p199838

I'll use Pokey RND if detected or will use software random generator. I used this one after small change. https://codebase64.org/doku.php?id=base:ax_tinyrand8

My recent game port using heavily RND And now Concerto stabbing me in the back Game is almost finished 😭

What about RND? Not supported?

@Cyprian Jochen Hippel - Giana Sisters converted from YM2149 to SN76489 GianaSister.ogg.3c8f979e690732219ab1a7adf7b7ae92.ogg

Pros: Maria Cons: Maria

Could you please give more details on how this ring buffer will work?

https://atariage.com/forums/applications/core/interface/file/attachment.php?id=926309