unebonnevie

I'll be honest that I don't know how. I see the 4 yellow LEDs light up and stay up. I press the "Boot" button, and nothing happens. The fact that the 4 yellow LEDs light up, it means that SDrive has found SDRIVE.ATR file from the SD card. I even tried to dipswitch to set as D1 with dipswitch #1 being ON only, and nothing helps. http://raster.infos.cz/atari/hw/sdrive/SDrive_en.pdf is the manual that I've been reading and reading but nothing helps. Per the schematic that posted the link to in the original post, the whole thing is powered via the SIO port's VCC +5V. Of course, my SD Card is powered via a 3.3V derived off the 5V. Thanks for any tips!

Hi all, As a fun project, I took the challenge of building the ORIGINAL SDrive for my Atari 800XL, the one that has the below schematic with just LEDs as indicator rather a display. I managed to got it built, and put in the SDRIVE.ATR file in the root directory. The thing boots up and I see FOUR yellow LEDs lighted up, and I know that my SD card is functional. However, I don't know what to do next to get the file menu displayed by the Atari 800XL. I actually hear loading noise from my TV, but, no file menu gets displayed. I followed the intructions at http://raster.infos.cz/atari/hw/sdrive/SDrive_en.pdf, and, man, it has a lot of words, but doesn't help! All my dipswitches are OFF, which means I have "SDrive ID=1, system drive=D1:, special boot drive activated as D1:, other drives unchanged." I even looked at the firmware, and it is extremely hard to understand exactly what the next steps to do. Tips are appreciated. I won't time to do other builds that are derived off the original SDrive! Btw, in the schematic, there is a N4148 diode that goes from the SIO connector's data in pin to the ATMEGA's serial TX pin. Why the diode is needed? The strange thing also is that the Atmega uses a 14.31818Mhz crystal as the speed. http://raster.infos.cz/atari/hw/sdrive/SCHEME.PDF from http://raster.infos.cz/atari/hw/sdrive/ THANK YOU!

Hi all, Does this game support hi score saving with the Atari 2600 SaveKey Plus (https://hackaday.io/project/165992-savekey-plus)? Also, I would like to try demo #2 by burning it to a 32KB EEPROM. But I guess I need some sort of logic chips to do bank switching? Would appreciate any tips on this. Thank you!

Any hires graphics library or API set will do. Thanks.

Hi all, As you know the VIC20 has the cartridge SUPER EXPANDER that provides extra BASIC commands to sounds and graphic modes and drawing commands like circles and lines. I am very interested to know if there are documentation of actual assembly entry points of all of the SUPER EXPANDE routines, so that I can call from my own assembly program. Thank you for any pointer.

Can anyone point me to an EagleCAD library that has the DIN6 IEC connector? Thanks!

Thanks, SteveS. Yeah, I actually put in debugging statements in the code using the LED to blink, etc. And basically it fails on fatInit(...) not finding FAT16 file system, even though I formatted my SD card as FAT, which is FAT16. I only have ONE file on the SD card, and that is the SDRIVE.ATR. The SDrive firmware code is atrocious ? Anyway, fatInit(...) detects the SD card to be something else that is *not* FAT16 or FAT32. It's something else. There are many constants of filesystem type. For sure, it's not detecting FAT16 or FAT32. I just need to check for other types by blinking the LED for debugging. My card is 1GB, which is less than the maxium 2GB requirement by SDrive. I couldn't find an SD connector with the CARD DETECTED pin, so I use the below SD card breakout board. And ground the GPIO pin on the ATMEGA8 that checks for SD card detection.

hi, I managed to build the circuit of the SDrive at http://raster.infos.cz/atari/hw/sdrive/sdriveen.htm. When the board is plugged into the Atari 800XL's SIO port, only the GREEN led is ON and it stays on EVEN I have made sure to insert the SD card in. What does the SENSE connection to the SD card connector in the schematic mean? Does it mean that the firmware would try to detect if the SD is plugged in? If so, is the sense supposed to HIGH or LOW once the SD card is plugged in? My SD card does not have the sense pin. So, I simulate that with a jumper to 5V or GND. I should jump to GND to say that the SD is plugged in, that is, to help the firmware to determine that the SD has been plugged in? Thanks for any tips!

Hi, Anyone knows how I would put this game onto a cartridge, so that I can play it on a real Atari 2600? Thank you!

hi, I am trying to build a 64KB atari 2600 cart that uses a GAL to do bankswitching. The open source design is from GrandIdeaStudio.com. Here is the link to the schematic http://www.grandideastudio.com/wp-content/uploads/pp_atari2600_64k_schematic.pdf. The author also supplies the JED file to program the GAL. Has anyone tried out this design before? Is there like a menu driven program, obviously as a 4KB ROM itself, to help select the banks, thus, the games in a 64KB EPROM? Thanks!

I saw the below on eBay!!! It's an Atari 5200 joystick adapter that can be used with Sega Genesis controller! Looks good! I bought one! @Nojeee Thanks for the game, btw. This game looks pretty colorful! Nice! Was it written in assembly language or in C? https://www.ebay.com/itm/114619241665

Thank you VERY much for the attachment and tip.

Thanks for the info. I'll WDC's PIA and give it a try. Their PIA (the part mentioned in the OP) is 100% compatible with Rockwell 6520A, which the Atari uses. It's much cheaper and is 100% new then buying on eBay of 40-year-old part. How do you diagnose you 800xl's delay line and MMU broke? (I am able to locate the MMU on my 800's XL motherboard.) Thank you!

Hi, I believe my 800XL goes dead because of a dead PIA. I get the blank screen. Swapped out other chips with working ones, and those chips are fine. The only one left is the PIA, but the working 800XL that I use to debug the dead 800XL does not its PIA socketed. I have a strong feeling (yes the force is strong on this one), the dead 800XL is due to a bad PIA chip. I was doing some SIO HW project, and probably caused it to die. So, I saw that WDC (Western Design Center) has the PIA below and it's compatible with the Rockwell PIA that is used by my dead 800XL. The only thing I am not sure of is the WDC says NMOS compatible. Does anyone know if the Atari 800XL's Rockwell PIA is NMOS or CMOS? W65C21N6TPG-14 Peripheral Interface Adapter NMOS Compatible / Plastic Dual-In-Line, 40 pins, RoHS and Green Compliant Mouser stocks it at https://www.mouser.com/ProductDetail/Western-Design-Center-WDC/W65C21N6TPG-14?qs=%2Fha2pyFaduifD1gf44hwy5ejokbLHUq8bOouCmEsViCPIGu8FqTGdA%3D%3D Thank you!