gpercy

Hi CC, yes, that's the correct procedure. I've looked again at your photo and think I can see an error. The cap at C2 appears to be connected between gnd and A14 instead of +5v. The uppermost connection is soldered to the incorrect point. C2 should go from gnd to +5v which is a solder point hidden under the upper end of your cap. Check it out. Also, be sure that CE/OE are wired to pin #13 on U3 (not pin #14, not quite clear in photo). Otherwise, check through all troubleshooting tips in devcarts.pdf at the end of page 8. Then, otherwise, try a small binary such as a 264K which has the best chance of working. cheers .... Graham.Percy

BTW, the version of 7800ctrl.exe which I am using is dated 29th Nov, 2002 (appears upper right of screen when executing without any command string). cheers ... Graham.P

Hi CC, bit late comining in on this, and you may have figured it out already. ;o) Your cart looks fine. Take a look at devcarts.pdf page 4, note 7 for 32K cart. Requires "7800ctrl -c1 name.bin" when uploading using latest 7800ctrl.exe since default cartridge type is assumed to be bankswitching type (-c0). Without -c1 switch your upload will be copied as two 16K blocks over the same memory space ---> fail regards... Graham.P

I have for sale what remains of my collection of Atari 7800 devcarts which can be used in conjunction with Eckhard Stolberg's 7800ctrl.exe program run under DOS and a joystick port to computer parallel port connector cable. I have recently tested all of these cartridges for all compatable game types using an old Pentium 4 computer which I scrounged from the local computer repair shop. Worked just great! All cartridges will require some means of uploading game programs. Simplest is with any DOS based system which has a parallel printer port and you will need to make a printer port to joystick port link cable per Eckhard's DevOS instructions. The first four cartridges are without built in BIOS (Ramona) and require a modified PAL or NTSC Atari 7800 console with DevOS 0.2 installed. 32K Pokey chip cart $40 32K Pokey chip cart with socketed SRAM (so SRAM can be swapped/tested) $40 2K or 4K and 8K/F8 Atari 2600 programs $80 8K/F8 and 16K/F6 and selectable Scram for Atari 2600 programs $140 The remaining two cartridges are with built in Ramona BIOS and can be used with any unmodified PAL or NTSC Atari 7800 console and parallel port link cable. 2K or 4K Atari 2600 programs $60 144K full bankswitching Atari 7800 $120 For a full listing of compatable software types for each cartridge please see devcarts.pdf page 4. Regards to all Graham.Percy devcarts.pdf

Hi all, I have decided to start thinning out my collection so I have for sale an Atari 2600 with 160 games built in. This seems to be a rare one. I'd like $99 or near for this as a bare console. It's tested and working. I can post locally within Australia or world-wide, postal weight is 1.5 Kg. Please note, FAQ attached! cheers all Graham.Percy 2600_160.pdf

Hi again guys! I have updated my nes-7800.txt faq and uploaded a copy to my home page. This can be viewed by following the link to "video game downloads" from my home page at http://www.geocities.com/gjp57/index.html. (Look for the link to the text file at the bottom of the diagram of the mod'). I have also emailed a copy to the AtariAge editor, so hopefully the 2600 archive copy can be updated too. Cheers.... )

Hi Brad, Mitch and everyone else! Try this with the US controllers (NES-004):- Using 620Ohm resistors, jumper U to V and U to W. (Therefore requires two resistors. Hole labels per my original text FAQ). Sorry for the confusion here! Can you let us know if it works properly, it should. Cheers ........ gp Umm, please note that I have had to correct the resistor value I quoted above (was 6.8KOhm). My apology. I have been using the 6.8K resistors as pull-ups alot. ;o)

Hi guys! I have found that the micro switches in the front of the 7800 are it's achilles' heel. About half of all 7800 consoles I have bought over the years have at least one of the front switches not working. ie. Power, Pause, Select or Reset. I know you don't want to have to fix them, but that might be your best choice. Maybe you have a friend with a soldering iron. ;o) I have purchased consoles that seemed to be completely dead, but only needed a cheap switch replacement. cheers ....... gp

High guys! I did a bit of a discussion on sizing of 7800 (and 2600) games in my dev cart document:- http://www.geocities.com/gjp57/download.htm download "devcarts.pdf" for a closer look The actual bankswitching hardware that is provided in Atari's bankswitching 7800 carts is good for 4 megs. All you need to do is wire all remaining unused flip-flop data lines to the matching cartridge edge connectors, then wire corresponding flip-flop outputs to the new address lines on your 4 meg eprom. (These also need to be pulled high with 6.8K Ohm resistors). This will work on any regular 7800 console. Of course the programmer needs to make use of all 256 bank numbers! Bankswitching on the 7800 is done in 16K banks. These are "seen" by the system when reading in $8000-$BFFF. These banks are selected by writing the required bank number anywhere within the same range. The top 16K bank is always seen by the system at $C000-$FFFF regardless of which bank has been selected. (Flip-flop output is disabled when reading this region). The 16K region $4000-$7FFF is used for those odd sized games like Alien Brigade or Crossbow and by all 48K games. It's also used for extra RAM by a few games . eg. Jinks. Although Atari never used the full 16K for game RAM it could be done without modification. cheers ................ gp

Hi Guys! Here's my twopence worth then:- Here are the solutions to Crossbow. Note, R=Red, G=Green &, yep B=Blue. ;o) Crossbow 2600 Shortest Route to finish = GGBR or RRBR or RBRR A tour of all areas leading to finish = GRRGRR Crossbow 7800 Shortest Route to finish = GBBR Tour of all areas ending at finish = RGRBGBBR I really like Crossbow, particularly the 7800 version, and best played with the gun. ---------------------------------------------- On the topic of guns, I have never had any real success with an XE gun. (And I've had about 5 of them, either broken or dodgey in some mysterious way). I like to use a modified Sega Master System gun. (On 2600 or 7800 or XE system) See http://www.geocities.com/gjp57/download.htm for a text file describing how I modified these guns. cheers all........... gp

Hey there Ben! If the joypad leads are shot, all you need do is replace the lead. (This is what usually goes on the duff). Any lead with 9-pin din male connector can be used if all required wires are present. You need all wires except #7. (Look into end of connector for tell tail sign of silver wipers to indicate which wires are present). I like the Quickshot QS-130f joystick leads. Check compatible joysticks at S/H dealer or op shop. Peer down ends of leads to see! I use modified 8-bit NES pads on our 2600 and 7800 consoles all the time. These are great IMHO. The instructions to modify are on Atari-Age via:- 2600--->Archives--->FAQs--->NES to Atari 2600/7800 mod. Or I have the file at http://www.geocities.com/gjp57/nes-7800.txt And, (Alex may be interested) I have done a picture file of the mod:- http://www.geocities.com/gjp57/nes-7800.gif Hope this helps you! cheers ................ gp )