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Type: Posts; User: Eudimorphodon

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  1. Replies
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    Most (all?) TRS-80 Model I double density boards...

    Most (all?) TRS-80 Model I double density boards piggybacked into the 1771 socket and had spots for *two* controller chips in parallel, the original 1771 which was moved to it and a 1791 or...
  2. Considering those are games aimed at XT/AT class...

    Considering those are games aimed at XT/AT class machines it might make more sense to look at speed-brake software. Or you might try disabling the 486DLC’s cache, there’s a dos utility to control it...
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    Even a plain 720k floppy (assuming you can lay...

    Even a plain 720k floppy (assuming you can lay hands on a double density board) is basically like having a hard disk on those things, yeah.
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    Nope. That’s the Model II. Model I’s original...

    Nope. That’s the Model II. Model I’s original drive format was 35 track single density 5.25”.
  5. It particularly seems like a step back if the...

    It particularly seems like a step back if the BIOS in the board is properly recognizing the Cyrix chip and has full support for it. I know the upgrade version of the Cyrix 486DLC was sometimes a...
  6. I'm kind of scratching my head here; why do you...

    I'm kind of scratching my head here; why do you want to replace the Cyrix CPU so badly if it works fine? I doubt there are many games that are speed sensitive in a way that they would fail to run on...
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    This. As noted, some drives, usually newer...

    This. As noted, some drives, usually newer half-height ones, will automatically spin briefly to seat an inserted disk when the latch is closed, but that's it. Tandy used "dumb" Shugart drives which...
  8. Despite the 286 CPU the TL/2 doesn’t have the...

    Despite the 286 CPU the TL/2 doesn’t have the second interrupt controller cascaded on IRQ2 so far as I know. It’s basically an XT with an upgrade card built in.
  9. There are some bad knockoff cards out there that...

    There are some bad knockoff cards out there that make egregious mistakes. I can’t remember if it was an XTIDE or a RAM card, but not that long ago I recall someone posting about a card that worked...
  10. I’ve used the VIA Rhine driver on a C3 mini-ITX I...

    I’ve used the VIA Rhine driver on a C3 mini-ITX I have set up as a DOS box. It works, but it’s slightly annoying that it takes something like 40k of memory. (Compared to about 5k for an ISA NE2000 or...
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    I always liked NewDOS/80 better than LDOS myself,...

    I always liked NewDOS/80 better than LDOS myself, although I probably can't come up with a real reason why. It just felt "leaner and meaner", or something.
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    I'm sold that's unlikely to physically harm...

    I'm sold that's unlikely to physically harm anything and I'll agree it's probably a "contrived" use case that someone would write to location X in the CGA space and then read the same cell from...
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    I wonder if this is related to an issue I've seen...

    I wonder if this is related to an issue I've seen with the same DOS on the Tandy 1000's with DOS loaded high; if I run a piece of software that uses the Tandy graphics modes (which requires changing...
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    I'd noticed that my Tandy 1000 double-maps the...

    I'd noticed that my Tandy 1000 double-maps the CGA memory (when running "normal" CGA modes, not its 32k video modes), I didn't off the top of my head know if real CGA cards did that. So, yeah, if...
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    Kevin Flynn (https://en.wikipedia.org/wiki/Tron)?...

    Kevin Flynn?

    For the record, there are device drivers for enabling this if your particular PC's BIOS doesn't let you do it. (One of them is simply called "704k.com".)

    And of course you can't do...
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    Strictly speaking I feel like you're right that...

    Strictly speaking I feel like you're right that most of the time it's not going to cause an issue. But as you note, *if* one of the RAMs were to somehow get out of sync with the other (let's say one...
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    So... on the RAM card, are you enabling the whole...

    So... on the RAM card, are you enabling the whole 704k-768k block? (The switches indicate that it does RAM in 64k sections.) Assuming you're using a CGA card 16k of that at B8000 is going to be...
  18. The one flaw with the 6-pin firewire plug is it...

    The one flaw with the 6-pin firewire plug is it was *just* possible, depending on the socket, for truly hamfisted people to get it in backwards by pushing hard enough. That's where I really do have...
  19. So far as I know standard IDE CD-ROM drivers (IE,...

    So far as I know standard IDE CD-ROM drivers (IE, the "oakcdrom.sys" or "uide.sys" low-level part, not the higher MSCDROM extensions) bang on the raw hardware and don't care about the BIOS one way or...
  20. Wow, claims to only take up 6k. That's pretty...

    Wow, claims to only take up 6k. That's pretty impressive.

    Strictly speaking I imagine it wouldn't be impossible for someone to write a CD-ROM driver for the XTIDE card, so far as that goes, but I...
  21. I have network cards in my machines, so that's...

    I have network cards in my machines, so that's actually my go-to solution for most file transfer situations. Now it's true that the overhead for network drives can vary a lot (from only about 20k for...
  22. Projects. Hrm... 1: I keep meaning to getting...

    Projects. Hrm...

    1: I keep meaning to getting around to shaking the bushes to see if anyone (*technically:"enough anyone-s") wants a copy of my ridiculous multi-fuction Tandy 1000 EX/HX expansion...
  23. I suppose the one area that's not really covered...

    I suppose the one area that's not really covered by the XTIDE (unless this has changed and I've missed it) is it doesn't support CD-ROMs. Don't know how much call there really is for CDs on XT-class...
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    Out of curiosity, what are you using to grok the...

    Out of curiosity, what are you using to grok the int13 drive assignments? I tried Checkit 3 and Norton Sysinfo 6, and neither seems to tell you that particular piece of info. I can confirm after...
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    Technically, the ROM disk is still there; I'm not...

    Technically, the ROM disk is still there; I'm not going to say this absolutely definitively, but it seems like that on the BIOS level there's something about how its INT13 routines are implemented...
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