+acadiel Posted April 16, 2020 Share Posted April 16, 2020 4 minutes ago, Ksarul said: One other useful tidbit: I'm pretty sure I still have a pair of the circuit cards used for this one as bare boards. It uses a standard TI EGROM circuit card. Pretty much any true prototype TI cartridge was built on variations of this circuit card before it was committed to silicon in the form of GROM chips. Which tells me that they also were able to do 8K with this instead of 4K/4K. Unless they actually did 4K/4K =8K and "stacked" chips. I don't see a cart ROM/RAM chip space on there, so not sure how they did that part... If they did do 4K+4K to make a single GROM during prototype, then that just tells me they cheapened out in making GROMs 6K to save on some of the masking cost. LOL Quote Link to comment Share on other sites More sharing options...
Airshack Posted April 16, 2020 Share Posted April 16, 2020 from the seller of BASIC SUPPORT cart: " I worked at Texas Instruments and the internal 99/4 club had these for sale to us. I don't remember any details about what capabilities they added offhand. There are people that have the code and they may have more information. I just bought it because it was not generally available and I always try and get things like that in case a need arises but it never has. Some of the people who know the most probably won't be too forthcoming at this point in time as the last thing they want is to encourage more competition. 3 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted April 16, 2020 Share Posted April 16, 2020 1 minute ago, Airshack said: from the seller of BASIC SUPPORT cart: I worked at Texas Instruments and the internal 99/4 club had these for sale to us. I don't remember any details about what capabilities they added offhand. There are people that have the code and they may have more information. I just bought it because it was not generally available and I always try and get things like that in case a need arises but it never has. Some of the people who know the most probably won't be too forthcoming at this point in time as the last thing they want is to encourage more competition. ... and this is why Rich and I are trying to get this same cart working on the UberGROM. I strongly feel that the community should have access to this piece of TI history. We have way too many 'collectors' out in the wild who buy these things to hold onto them, and never do anything useful with them for the community (sharing pictures, schematics, dumping the ROMs, etc.) I know that some of the people who resemble that previous statement are reading this, and shame on you for hoarding and not sharing with the community. 5 2 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted April 16, 2020 Share Posted April 16, 2020 36 minutes ago, acadiel said: I know that some of the people who resemble that previous statement are reading this, and shame on you for hoarding and not sharing with the community. 2 Quote Link to comment Share on other sites More sharing options...
+FarmerPotato Posted April 16, 2020 Share Posted April 16, 2020 I just learned about TI's 16-bit wide EPROMs. Here's some on eBay: https://www.ebay.com/itm/NEW-TI-TMS27C210A-12JL-TMS27C210A-27C210-2MBIT-UV-EPROM-120NS-x-10PCS/164004199508?hash=item262f697c54:g:SHcAAMXQWx1RHQv8 I was going to use a pair of 27C010 (128Kx8) with every other byte wasted (identical images in each, A0 hard wired to 0 or 1). That gives 64Kx16 in the end. But this 40-pin chip is just so cute, and it saves space. (1 40-pin ZIF socket vs 2 32-pin ZIF sockets.) And it's in the TL866-II programmer's list. 3 Quote Link to comment Share on other sites More sharing options...
+sixersfan105 Posted April 16, 2020 Share Posted April 16, 2020 On 4/10/2020 at 8:44 AM, twoodland said: Click Here First - I get that the TI Program Recorder was a re-branded GE model, but ... https://www.ebay.com/itm/VINTAGE-TEXAS-INSTRUMENTS-CASSETTE-TAPE-PROGRAM-RECORDER-MODEL-NO-3-50160/233334689318?hash=item3653d4ce26:g:v50AAOSwHttdcyMN Ha oh man...I also love when sellers really go the extra mile with detailed descriptions. Description: "..." Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted April 16, 2020 Share Posted April 16, 2020 I just learned about TI's 16-bit wide EPROMs. Here's some on eBay: https://www.ebay.com/itm/NEW-TI-TMS27C210A-12JL-TMS27C210A-27C210-2MBIT-UV-EPROM-120NS-x-10PCS/164004199508?hash=item262f697c54:g:SHcAAMXQWx1RHQv8 I was going to use a pair of 27C010 (128Kx8) with every other byte wasted (identical images in each, A0 hard wired to 0 or 1). That gives 64Kx16 in the end. But this 40-pin chip is just so cute, and it saves space. (1 40-pin ZIF socket vs 2 32-pin ZIF sockets.) And it's in the TL866-II programmer's list. We use these for the yellow cart boardSent from my LM-G820 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
+FarmerPotato Posted April 16, 2020 Share Posted April 16, 2020 35 minutes ago, arcadeshopper said: We use these for the yellow cart board Sent from my LM-G820 using Tapatalk What is that? what do you do with 16 bits unless it's in the console? Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted April 16, 2020 Share Posted April 16, 2020 What is that? what do you do with 16 bits unless it's in the console? they have an 8 bit mode.. and for the 1meg and 2meg carts .. here's a fun one but I used flash chips on this one Took 2 to hold the dragon's lair intro 1 Quote Link to comment Share on other sites More sharing options...
+FarmerPotato Posted April 16, 2020 Share Posted April 16, 2020 17 minutes ago, arcadeshopper said: they have an 8 bit mode.. and for the 1meg and 2meg carts .. here's a fun one but I used flash chips on this one Took 2 to hold the dragon's lair intro Aha! I learned just now that TI's 4800 8Kx2 ROM had a 4-bit mode. In case you had a 4-bit computer? 2 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted April 17, 2020 Share Posted April 17, 2020 Want to make sure no one here is interested before I run this thing up to a thrift shop. https://atariage.com/forums/topic/304027-fo-cassette-briefcase-fits-ti-994-cartridges/ Quote Link to comment Share on other sites More sharing options...
Pheonix Posted April 17, 2020 Share Posted April 17, 2020 I'd like to get it, but won't have the money for a while Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted April 17, 2020 Share Posted April 17, 2020 23 minutes ago, Pheonix said: I'd like to get it, but won't have the money for a while I do not mind holding onto it if I know it is going to go somewhere. I just cannot sit on stuff anymore which is just going to take up space. Drop me a PM and we can talk. 2 Quote Link to comment Share on other sites More sharing options...
fimbulvetr Posted April 19, 2020 Share Posted April 19, 2020 CAN$314.16 for a sideport 32k memory expansion, but hey the shipping is free! https://www.ebay.ca/itm/New-Texas-Instruments-Computer-TI99-4A-32K-Sidecar-Memory-Expansion-Card-729-/114192263681?&_trksid=p2056016.m2516.l5255 Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted April 19, 2020 Share Posted April 19, 2020 CAN$314.16 for a sideport 32k memory expansion, but hey the shipping is free! https://www.ebay.ca/itm/New-Texas-Instruments-Computer-TI99-4A-32K-Sidecar-Memory-Expansion-Card-729-/114192263681?&_trksid=p2056016.m2516.l5255Wow and I only sell these for 50 bucks or for around a hundred you can get a 1mb samsSent from my LM-G820 using Tapatalk 2 1 1 Quote Link to comment Share on other sites More sharing options...
fimbulvetr Posted April 19, 2020 Share Posted April 19, 2020 2 hours ago, arcadeshopper said: Wow and I only sell these for 50 bucks or for around a hundred you can get a 1mb sams Sent from my LM-G820 using Tapatalk Just look at all that money you are leaving on the table! 1 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted April 19, 2020 Share Posted April 19, 2020 25 minutes ago, fimbulvetr said: Just look at all that money you are leaving on the table! Right! Obviously the market demands higher prices Quote Link to comment Share on other sites More sharing options...
Omega-TI Posted April 19, 2020 Author Share Posted April 19, 2020 3 hours ago, fimbulvetr said: CAN$314.16 for a sideport 32k memory expansion, but hey the shipping is free! https://www.ebay.ca/itm/New-Texas-Instruments-Computer-TI99-4A-32K-Sidecar-Memory-Expansion-Card-729-/114192263681?&_trksid=p2056016.m2516.l5255 Same seller, but for only $40.55 << HERE >> Quote Link to comment Share on other sites More sharing options...
+InsaneMultitasker Posted April 20, 2020 Share Posted April 20, 2020 Does anyone have an old PEB cage/backplane that they no longer want/need? Quote Link to comment Share on other sites More sharing options...
+FarmerPotato Posted April 21, 2020 Share Posted April 21, 2020 2 hours ago, InsaneMultitasker said: Does anyone have an old PEB cage/backplane that they no longer want/need? Yes. Let me check my garage. It’s a backplane inside metal only. 2 Quote Link to comment Share on other sites More sharing options...
+sixersfan105 Posted April 23, 2020 Share Posted April 23, 2020 Spotted: Tombstone City with the hard to find "modern-style" manual variant! Along with some other (more common) manuals and games. Solid price. Not mine. https://www.ebay.com/itm/TI-99-4A-Texas-Instruments-Command-Module-Cartridge-Lot-invaders-Alpiner-Munch/324143912783?hash=item4b787b974f:g:yg8AAOSw0PpeoLCl Quote Link to comment Share on other sites More sharing options...
humeur Posted April 23, 2020 Share Posted April 23, 2020 1 hour ago, sixersfan105 said: Spotted: Tombstone City with the hard to find "modern-style" manual variant! Along with some other (more common) manuals and games. Solid price. Not mine. https://www.ebay.com/itm/TI-99-4A-Texas-Instruments-Command-Module-Cartridge-Lot-invaders-Alpiner-Munch/324143912783?hash=item4b787b974f:g:yg8AAOSw0PpeoLCl Are you sure these manuals are so difficult to find I often remark them. Jean Louis Quote Link to comment Share on other sites More sharing options...
+sixersfan105 Posted April 23, 2020 Share Posted April 23, 2020 29 minutes ago, humeur said: Are you sure these manuals are so difficult to find I often remark them. Jean Louis Someone took my advice and snagged the lot. That was quick. Yes, they are difficult to find in this style, at least in North America. Not sure what you mean by you "often remark them." Quote Link to comment Share on other sites More sharing options...
humeur Posted April 24, 2020 Share Posted April 24, 2020 20 hours ago, sixersfan105 said: Someone took my advice and snagged the lot. That was quick. Yes, they are difficult to find in this style, at least in North America. Not sure what you mean by you "often remark them." look this manual. I did not put all those I had with this new presentation, some are more European side Jean louis 1 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted April 24, 2020 Share Posted April 24, 2020 I really like that Car Wars graphic. Quote Link to comment Share on other sites More sharing options...
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