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  • Kip, Timesharing BASIC requires the 88-VI/RTC card and interrupts. Last I knew, altairz80 does not emulate system interrupts nor the vectored interrupt or real time clock functions of the 88-VI/RTC. Mike
    deramp5113 Jul 17
  • Herb, HD floppy drives with HD media are specifically designed for a maximum flux reversal rate of 500khz when spinning at 360 rpm. This gives a 500 kbits/sec transfer rate with MFM encoded data and 250 kbits/sec for FM encoded data. This, in turn, matches the 500khz max flux reversal rate at 360 rpm of 8 inch drives. So HD floppies with HD media rotating at 360 rpm are a very good...
    deramp5113 Jul 16
  • Best thing to do is watch ebay. Currently, there's an A and a bT for sale. What do you have to trade? Steve ============================ ---In altaircomputerclub@^$1, wrote : Hi All, Anyone has a Altair 8800 for trade or sale? Bobby
    alltare@... Jul 15
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  • Hi All, Anyone has a Altair 8800 for trade or sale? Bobby
    Bob Aviles Jul 15
  • Kip, Note that Timesharing BASIC requires the 88-VI/RTC (Vectored Interrupt and Real Time Clock) card to be in your system and all terminal ports must be 88-2SIO ports. You can download a disk image for Timesharing BASIC 1.1 and some notes at http://deramp.com/downloads/index.php?dir=altair%2Fsoftware%2F8_inch_floppy%2FBASIC%2F You can download the PC2FLOP utility for writing disks...
    deramp5113 Jul 15
  • Sorry, it was recently pointed out to me that my email showed up at the bottom of everyone of my posts, but apparently not any more! Contact me at deramp5113 at the Yahoo domain name. Thanks! Mike
    deramp5113 Jun 29
  • Thanks for the pics! The newer style unit matches the Altair drive I have, including the newer style buffer board with the large heatsink and IDC connectors for the ribbons cables. I may be interested in buying that unit. Please send me an email so we can discuss it. Whoever does get the newer unit, I don't believe you'll find any documentation, but I've put together some...
    deramp5113 Jun 29
  • The drive DD 3841 has the newer buffer/power supply board with the 8800b style face plate. My drive DD 3118 has the newer faceplate with the old buffer & power supply boards. The newer faceplate may be older that the newer buffer/power supply board. The Drive DD 1057 has the same orange sticker as my drives DD1059 & DD1041. The sticker says "Ontario hydro electric approval by...
    yahoo@... Jun 29
  • I've seen the big heat sink version on eBay before, so a few might have been made. I think some Altair dealers bought surplus parts in addition to employees. I bought my Attache from Burcon, for example. Other employee owned surplus that was sold years later by "Riatla" on eBay. Four of my six single drive cabinets have bad power. Some have a fan blowing in and some fans blow out...
    yahoo@... Jun 24
  • Tom, I just learned from Tom Durston that the drive cabinet I have (buffer board and power supply combined onto a single board and IDC ribbon cable connectors used on the buffer board), never shipped. It was in test when the Pertec acquisition took place and Pertec subsequently shut down all Altair development projects. This style drive cabinet and/or boards that have shown up on...
    deramp5113 Jun 24