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I have put a together MAME/MESS emulation package that emulates the MyArc Extended BASIC II & TI P-Card for the Ti99. MyarcXBII: MyArc was a company that made peripherals for the TI-99 line. There most famous peripheral (if you want to call it that) was the Geneve. The Geneve was a complete TMS 9995 computer that fit in the TI-99 PEB as a card. Another peripheral that was lesser known, but just as revolutionary, was the MyArc Extended BASIC II. The MyXBII consisted of the 128k or 512k Memory card, a set of disk and a cartridge. When running the MYXBII had 3 times the memory of TIXB, was up to twice as fast as TIXB and was able to access all the graphic capability of the TI graphics card including the hi-rez. If a MyArc HD disk card was added the software could even boot from the MyArc hard drive. It turned the TI99 into a real power house. Unfortunately because of it's expense and the fact that you needed a PEB to run it, the MyArcXBII never really caught on. Now, though, with emulation it cost nothing so through the power of MAME/MESS the power is being released. Start the MyArcXBII at the TI99 main menu by choosing 3-128k BASIC and this will boot the MyArcXBII from the hard drive. P-Card: The P-Card was a card for the PEB that was, more or less, a complete operating system apart from the TI99. It's a virtual machine processor on a card that ran P-Code. It was written totally in software and was based on Pascal and was able to run on other computers that also conformed to the P-Code specifications. It is nothing like a standard TI-99 and when booted takes over the TI-99 and even has a specially formatted disk it uses. There is a complete suite of software and if you can figure it out, kinda nice. To run the P-Card in MAME/MESS click under OPTIONS-DIP SWITCHES then turn on the P-CARD. Hard reboot the machine and the TI-99 will start in the P-Card mode (after a few seconds of beeping and blank pages). To go back to MyArcXBII just turn the P-CARd switch OFF then hard reset the machine. The MAME/MESS package works with any versions of MAME/MESS past version 222. Just merge your version of MAME/MESS into the MESSxxx directory and point the already created batch file in the root to that directory. Package includes manuals, software, batch files and everything you need except MAME/MESS itself. Enjoy. Download from my https://ti99resources.wordpress.com/software/ At the bottom of the page is MAME package, click on MyArc Extended BASIC II to show download files. I have both a package with and without the P-Card. (a truly nice tripped out Ti-99 from mainbyte.com)
Mean Time Before Failure - It's starting to look like this is beginning to effect more and more P-Box power supplies. Preemptive Maintenance - Fixing the situation before it destroys something else more expensive with it's failure or, puts one out of service. Plug & Play - Designed so even the least technical people in the consumer market will feel comfortable installing it, ensuring more sales. Limited Targeted Market - Niche markets, usually have test markets or single runs of a moderate size to keep costs down. I'm thinking it may be time for "someone out there" to consider a viable Plug & Play replacement for the P-Box power supply. 1 - Could the cost be reasonable? (How much are you willing to spend for an easy replacement to protect your equipment) 2 - Could it be a direct replacement, not requiring any other modifications from the customer. 3 - Could there be "an extra" on the board as a further inducement to purchase? (Example: USB power port)