Texas Instruments TI99/4a cassette software by Program Factory limited UK, looking for other cassette software for the TI. #TI99 #texasinstruments #retrogaming #retrogames #80s #cassette #vintagecomputers #software

Texas Instruments TI99 /4a cassette software from the UK, Nodrub's Quest by Bamby software. #ti99 #texasinstruments #retrogames #cassettesoftware #80s #retrogaming

Texas Instruments TI99 /4A replaced the cartridge shell for a clear shell on my all time favourite game Parsec. #ti99 #texasinstruments #cartridge #retrogame #80s #computer

Texas Instruments TI99 4a collection. This is some of my collection. Be nice to see other retro computer collections. #texasinstruments #ti99 #retrocomputer, #computer #Collector #vintagecomputer #RetroGame #atari #commodore #apple

Texas Instruments TI99/4A home computer cartridge software from Europe for the TI. Anyone have these or similar. #ti99 #texasinstruments #retrogames #80s #cartridges #games #vintage #Computing

Texas Instruments TI99/4A home computer cassette games from the UK. My first games I got in the early 80s. Do you remember yours ? #ti99 #texasinstruments #retrogames #retrocomputer #80s #cassette #Computing

Texas Instruments TI99/4A cassette software, looking for UK games for the TI. #ti99 #retrogames #texasinstruments #80s #cassettes #computers

🧠 Dare me to do it again. Custom silicon. One teenager. Two ASICs. Zero fear. In 1986, while still in college, I was asked by Myarc to design their first ASIC—an ambitious plan to shrink an entire TI-99/4A-compatible motherboard into a single 4000-gate chip. No roadmap. No YouTube. Just me, some gate arrays, and a mandate to bend logic to my will. I trained directly with Mitsubishi’s EDA team, built the netlist, and verified the design with simulation vectors—all in under two weeks. 💥 First tape-out? Dead on arrival. Not because of my logic—but because Mitsubishi’s own timing data was flawed. I proved it, using custom boot ROMs, live oscilloscope traces, and hacked-together hardware mods. Mitsubishi acknowledged the issue, gave us a free second run, and I optimized the design even further. ✅ Second tape-out? Perfect. Fully functional prototype. Demoed in Boston, Chicago, and Germany. Real-time TI-99/4A emulation in a compact form factor. First of its kind. Fast-forward to 1987: Myarc wanted a second ASIC—this time for a unified Hard/Floppy Disk Controller. I spent six days on-site with California Devices, running nonstop validation. 🎯 First tape-out: flawless. That chip went into mass production and became one of the most advanced I/O controllers in the TI-99/4A world. California Devices offered me a job on the spot. ⸻ Two ASICs. One tape-out failure I didn’t cause—but fixed. One flawless run. And a lifetime’s worth of lessons in design integrity, systems thinking, and getting it right when it counts. You want silicon that just works? You want a first-time-right result under pressure? You want someone who lives for the impossible? Dare me to do it again. paul-charlton.vercel.app/sto… paul-charlton.vercel.app/sto… #ASIC #EDA #HardwareDesign #Throwback #EngineeringLeadership #TI994A #Innovation #SystemsEngineering #ICDesign #LinkedInTechStory #DareMeToDoItAgain

Texas Instruments TI99/4a cartridge TOPPER by Romox, This is the only one missing from my collection. #ti99 #retrogames #romox #software #80s

My Texas Instruments TI99/4a home computer is now finally complete with the Texas printer. #ti99 #retrogames #80s #computer #Printer #retrogamer

Great weekly computer magazine in the UK. Fantastic coverage for the Texas Instruments TI99/4a. Ordered a lot of cassette software from there.#ti99 #cassettes #Software #retrogames #retrocomputer #magazine

My Texas Instruments TI99/4 collection. Always looking for items to add. #ti99 #texasinstruments #retrogames #vintage #80s #Computing #Software

Great advertisements for the Texas Instruments TI994a home computer by Synapse Software. Unfortunately none of these titles materialized. #ti99 #atari #apple #vic20 #commodore #IBM #radioshack #retrogames #retrocomputer #80s #vintage #advert #texasinstruments

Great advertisement for the Texas Instruments ti99/4a home computer by Apex Software from the UK. #ti99 #ti994a #texasinstruments #retrogames #retrocomputer #80s #retro

Texas Instruments TI994a corcomp cc9900 expansion, looking for one. I'm will pay top price.#ti99 #retrogame #retrocomputer #vintage #corcomp

Gamevision cartridge Zero Zap for the Texas Instruments TI994a home computer, looking for boxed Connect Four - Hangman - Yahtzee #ti99 #retrogames #RETROGAMING #miltonbradley ,#MBelectronics #80s #computers

Really nice adventure game for the Texas Instruments TI99 by Intrigue Software. #ti99 #retrogames #vintagecomputer ##texasinstruments #80s

Texas Instruments ti99 cassette software Parco Golf by Parco Electrics. One of TI's great online retailers in the UK. #TI99 #retrogames #80s #retrocomputer #texasinstruments #parcoelectrics

Some great quality games for the Texas Instruments TI994a home computer #ti99 #texasinstruments #retrogames #80s #vintagecomputers #cassette

Some sport games for the Texas Instruments TI994a home computer from the UK. #ti99 #texasinstruments #retrogames #retrocomputer #80s #cassette #uk