ᴘɪᴇʀᴄᴏ

@Pmaxsd You should have a look at Gyurco's version for Mist, it's a good refactoring that includes nice fixes and features, like spinner.

Reactor (1982, Gottlieb) coming to MiSTer FPGA with Votrax SC01 speech synthesizer 🥳 It will be another game variant for the QBert core if I manage to not break compatibility🤞 #votrax #sc01 #reactor #votrax #sc01 #MiSTer #FPGA #RetroGaming #Arcade

@HerrBerzerk @Pmaxsd Hi, I just pushed a fix, a new release will come soon.

@pcornier @Pmaxsd Hi Pierco, love your Q-Bert core. Would you mind fixing the V-Flip option? At the moment, V-Flip is mirroring the image Horizontally, that doesn't help. Expected behaviour would Flip the image vertically for Arcade Cabs or ppl with a big CRT in wrong direction. Would be fantstic.

This is so cool! Thank you @Pmaxsd

@Pmaxsd This probably comes from my capture system.

@pcornier Welcome 🤗 I'm just wondering, why am I hearing everything doubled? 😳

@Pmaxsd Fantastic! Merged!

After 6 years finally Qbert is getting his @#&*! speech on MiSTer FPGA 🥳 Full IIR filterbank, DDS oscillator, glissando, vendor-agnostic VHDL, GHDL testbench included. PR already open 🤞 github.com/shufps/Arcade-… #qbert #votrax #sc01a #MiSTer #FPGA #RetroGaming #Arcade

I used to think we needed broad knowledge to build custom tools when porting hardware to FPGA. Now, with AI, a few prompts give us everything we need🙃

@minchoi Create an image at 48.8584° N, 2.2945° E, January 1888

Holy moly... Nano Banana Pro is wild "Create an image at 31.7785° N, 35.2296° E, April 3, 33 CE, 15:00 hours."

Thanks to the kindness and professionalism of the staff at the DeGolyer Library @SMU_Libraries, I finally gained access to scans of the TMS7000 Microcode Development Guide from the Texas Instruments archives! 😀

@KristopheTorres Oui, j'ai cherché partout 😕 Je pense que la seule solution serait de connaître quelqu'un qui pourrait aller fouiller les archives de Texas Instruments au SMU à Dallas pour faire les scans. Merci d'avoir pris le temps de regarder en tout cas ! 🙂

@pcornier Ici il y a beaucoup de sources pour le développement electrickery.nl/comp/tms7k/

I try to rebuild the TMS7000 microcode ROM, mostly guesswork😒Frustrating that the listing exists in TI’s archives but hasn’t been scanned yet...

@marcusjordan Thank you. I think the microcode is in one of the last two in the list, but I'm not sure if anyone has scanned them yet.

@pcornier you might want to take a look here: bitsavers.informatik.uni-stuttgart.de/components/ti/…

It seems one of these documents might contain the full source code of the TMS7000 microcode. Does anyone know where I can find the microcode listing? - TMS7000 Micro-architecture - TMS7000 Microcode Development Users Guide - TMS7000 Micro Assembler

@RndMnkIII @PixelCNinja I lost my Game & Watch when I was a kid. I had left it on the roof of the car, and when the car started moving, it was gone. It's a childhood trauma I've never really been able to get over 😅 I think it was Parachute if I remember correctly. My sister had Donkey Kong jr.

@PixelCNinja @pcornier

I've played on an emulator, I've played on an FPGA, but there's something special about playing on the original machine that you won't get from the others.

@RndMnkIII @PixelCNinja I agree, the feel when you press the rubber buttons, and the sound produced by the Sharp microcontroller are things only the original device can deliver.

@PixelCNinja The nostalgia factor also influences, but playing with that button layout, the touch, the sound is noticeable through touch, I don't know, they are small details that add up

I spent several weeks working on a RISCV32 CPU, and now I can boot Linux! 🙂 It's just a software simulation for now.

Another technical detail about Pandora's Palace: they set the four upper bits of DX bus (sprite X/Y) to high impedance (COL signal) to insert the H/V flip flags from DC in time (blue), ensuring the Konami 503 captures them correctly, since the attribute byte never reaches it.

Pandora's Palace has 24 hardware sprites, but the title screen shows up to 38 sprites at once. This is possible thanks to the Konami 85 scroller chip, which has a vertical read pin. The CPU uses it to track the scanline position and reuse the slots of already rendered sprites.

End of vacation, time available for MiSTer = ε 😭

I'm rewriting some of my guesses with better chip implementations. I'm working on the Konami 504, which is mainly a 6809 E/Q clock divider. I'm only writing HDL, someone else reversed it. It seems to work! 😊

@AndreaBogazzi Yes, I've been verifying each schematic section but there's a large number of undumped PAL chips. I've guessed some, but too many are still missing. I don't want to rely too much on l guesswork to keep it accurate, so it's on pause until I find a way to reproduce the chips.

@pcornier Are you also ( or were ) working on super off road? or i remember wrong?

I hooked up PROM and fixed values for the color resistors. I need to look at sprite decoding now.