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llopis

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About llopis

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  1. People tried it with GW-BASIC on an IBM clone at 4.77Mhz and it was 34 seconds 🙂 https://docs.google.com/spreadsheets/d/1bfWSR2Ngy1RPedS6j-M607eeAhsd40-nhAfswILzzS8 Someone reported making that with Javascript and being something like 0.1 seconds. I suspect 99% of that was probably loading runtime libraries. Haha.
  2. Me too but... I only found out about it right after I released the video!!! I will definitely cover it in a future video. I'm bummed that I completely missed the boat and I can't get a Dragon's Lair cartridge today, but I actually spent an hour this morning going over the presentation of how it was done. Really, really amazing stuff!
  3. Hi everybody, I just released the last video in the TI-99/4A series (for now). This one focusing on using it, checking out some of the BASIC performance issues, and trying out a few games. I'm hoping to do a followup sometime with the RAM expansion, speech synthesizer, and more games. Hope you enjoy it!
  4. Oh! I didn't realize that. That's super useful. Thanks!
  5. Yeah, but I can't program the 2732 easily either with my crappy programmer. I'm looking for a 27128 -> TMS2532 (so, 28 pin to 24). If not I can probably easily make one this evening, but I figured I would ask first in case there was one available.
  6. Right, I saw that too. And after it failed, I tried the trick of applying 21V to VPP directly to one pin and it made no difference either. At that point I wasn't sure if it was the programmer just not supporting them (even though they claim to) even with the applied voltage, or if they were fake chips. The fact that they all had different die sizes and shapes doesn't fill me with confidence. If you're familiar with legit 2732s, can you have a look at the video and see if you think they're fakes? Here's the link with the time stamp to the close up (04:30)
  7. After struggling to use the TL866II Plus to try to program some 2732 (which failed, probably because they were fake EPROMs) and then making a rather ugly 27C128 adapter on the fly (see video below), I would love to make or buy a small PCB that has those adapter connections built-in. Before I just make my own, is there one already available? Either as Gerber files or ready to buy somewhere? My initial search failed to find anything (mostly this thread comes up, but it seems to be more about the adaptor for the 2732 instead of a 28-pin one like I need).
  8. The latest arrival at the Lab is a TI-99/4A, which is a computer new to me. Shoutout to @ti99iuc for their help getting a power supply! Hope you enjoy it!
  9. Thanks @ti99iuc, I'd rather find a European power supply, but if I can't find anything else, I'll let you know. Another member alerted me that there's one on French Ebay, so I might go with that one. Thank you anyway!
  10. Hello, Does anybody have a TI-99/4A power supply for sale in Europe? It doesn't have to be original, a modern one would do too. I looked into the options to power it with a MW RT-50A directly to the DC connector, but it would be nice to have something closer to the original. Thanks!
  11. I was told in the comments that the early PAL Apple IIs were mono, but in later models (like this one apparently), they built the composite video out from the card directly on the board. So check it out, although from the name of your unit it sounds like it's probably one of the early ones.
  12. Should be particularly interesting to those of you in Europe, or if you want to know how they managed to get color on PAL systems from a computer that relied on NTSC interference to create color 🙂
  13. A quick video revisiting the 65XE from a couple of weeks ago. The keyboard membrane replacement wasn't as straightforward as I was hoping because... I got the wrong kind of membrane! Fortunately I followed @Simius advice and fixed it using some M3 washers inside each key plunger. Worked great after that!
  14. Thanks everybody! I almost threw away the RF shields (I always throw away the silvery cardboard C64 ones), but with the XL computers I had in the past, they actually made a big difference in the RF video quality. So I decided to give them a try just in case they were salvageable. The spray I used was marketed as "galvanizing zinc spray". Specifically for cold temperatures. They have them available in any hardware store. I didn't find any good hits on the Amazon US store, so maybe it's called something else over there. Here's the link to the Spanish store just in case it helps as a reference: https://www.amazon.es/CRC-30713-AA-Spray-400-ml/dp/B00U1J1AYU
  15. This Atari 65XE didn't look too bad on the outside, but the inside was a complete nightmare: dust, rust, dirt, insects, spider webs, and even some kind of cocoons! Where did this poor Atari come from, the trash?? I actually had to use hydrochloric acid to remove the massive rust stains on the bottom case. All in all it came out really well, especially when I get the keyboard membrane 🙂
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