Recent content by VileR

Re: Intel's reason for leaving a dozen 8085 instructions undocumented (lack of forward compatibility with the 8086) - FWIW, Stanley Mazor substantiates it in an IEEE article (https://ieeexplore.ieee.org/ielx5/85/5430751/05430762.pdf). Supposedly it was Davidow's idea: "Another constraint for...

I don't think so. I've browsed a few threads that were recently moved around between forums, and I can still access them through the old URLs in my history. That's my take too, but there's always someone attempting to engaging seriously with what looks like an obvious spambot to me. Then...

Nice, thanks for having a go at it - good to have those 3 points confirmed. Too bad about the program... I'd ask if there were any helpful error messages (syntax error at line #, issue with the GOSUB falling through, etc.), but troubleshooting without a way to test is flying blind anyway. If...

Yeah I definitely agree - sub-forums should be visible on mobile (from the main forum list). I did a bit of experimenting, and fortunately this can be done with a few changes in the CSS. The key seems to be modifying the existing rule for screen widths less than 650 pixels (logical, not...

I should've tried harder... rolled another loop, so this one's a bit shorter: 10 OPTION BASE 1 ! match str/array pos. 20 D = DISPLY(1) ! set US charset 30 LET EVEN$ = RPT$(CHR$(20)&" "&CHR$(8)&" ", 16) ! 64 (32 chars+even...

Nice, that'd be appreciated! I think a picture of the original CRT would be preferable - flat screens tend to have fuzzy interpolation when not at their native resolution, so the dot patterns may be harder to establish. But either way would work for me, whatever is more convenient. The BASIC...

(EDIT: ha, I must be losing it -- the bitmaps for ¼, ¾ do appear in the ROM... so these characters don't belong in the 'missing' list, but I can't edit my original post anymore.) Yeah, the ones in your set are all good - the bad one is in the other bitsavers set...

Hm, that's interesting - the CRT section of the service manual only mentions a read-only character generator (as the part that is addressed by the character codes in the row buffer, to fetch the dot patterns which are then sent to the video circuits). On the other hand, what you say would make...

I was looking into the available docs and firmware for this system (http://bitsavers.org/pdf/ibm/system23/), to try and figure out how this thing handles text display. Naturally I don’t have one of these – I’m just a certified nutter for bitmap font stuff, but the System/23 is particularly...

Somehow that doesn't surprise me one bit. Par for the course, as I suspect others would realize if they're familiar with the individual in question. Internet clout is a hell of a drug. ;)

Autodesk Animator! I'm still kicking myself for not keeping all the stuff I made with that... For the OP, I should add: GIF looping was an extension of the format by Netscape, around 1996 or so. Animated gifs weren't widely used or supported before that point, so 8088 players are going to be...

^ Yeah, that's the one... although of course that's an idealized (pixel-to-outline) rendering, sharper than a CRT. When I did that I had a nice hi-res screen photo as a reference; I can't seem to find it anymore, but this video has some pretty clear footage: . Even on a CRT, that's extremely...

Depends on how modern is 'modern', but gcc-ia16 is a thing. https://github.com/tkchia/gcc-ia16

On one hand, those are artifacts of digital culture worth preserving, and the source code for some of these could be interesting. On the other hand, there has to be some special punishment for whomever named one disk "Indiana Jokes and the Laff Crusade".

This. Although as long as you're taking care to read the port yourself, you can mask off IRQ1 at the PIC via port 21h, ensuring that INT 9 will not be invoked until you re-enable IRQ1.