All, A new version of bt_edit is available here: http://knox.ac.free.fr/files/bt_edit.zip It now includes a cool set of 7 new levels (+ title) conceived by...
Joe Z, all, I was wondering whether the following pseudo-opcode could be implemented in AS1600: BQ $xxxx --> ADDI #delta, R7 (or SUBI #delta, R7) Could be...
Arnauld, Do we know if it's actually quicker? There are a handful of operations that require an extra cycle if they operate on R7, and I wouldn't be at all...
... True. I'm going to test that during the evening or the week-end and let you know about the results. ... Hu... Yes!! Indeed :-) ADDI / SUBI allow longer...
... Cool. If it works, then you could do a macro for your quick branch pretty easily. ;; absolute unconditional branch MACRO BQ label MVII #%label%, PC ENDM ...
... Interestingly, MVII #cst, R6 seems to be similarly inflicted, taking 9 cycles instead of 8. I'll try to write up better test code and post it to the list...
... Yup! Now I'm really curious about INCR PC and ADCR PC. -- ... Joseph Zbiciak http://spatula-city.org/~im14u2c/ Not your average "Joe" R$+@$=W <--...
... Sounds like a very reliable way of doing the cycles estimation. My own method [1] is more calculations-based but is certainly not so precise. It should...
So my initial thoughts on the Intellivision "Direct To TV". I guess the first thing to say is that this is based on my memories of 5 - 10 minutes playing...
James, Of course you may use the review on the Bodega, I'd be honoured. To save you some work I have put a revised version up on my website (www.decle.co.uk)....
Hi all once again, Joe, I have done a little bit more work on the document. I do not know if you got my e-mail but I have done more since then. Anyway I am...
It's apparently an INTV, all right, at least according to historical reports I can find on the web. However, the video system must have been beefed up because...
... That's actually what IntyOS is doing. But with only up to 64 GRAM cards, of course. That's a bit more than 3 full lines of text. ... True. I haven't...
... [...] ... I wondered about that as well. My guess is that the Tutorvision actually implements a full set of 256 GRAM cards. Take a look at the Tutorvision...
That would be SO useful! You could do bitmapped graphics. I had been wondering if such a thing would be possible to do, it would have made more sense (IMHO)...
... If you fill the GRAM with a default character set, you have to fill it from somewhere. Thus, you never truly lose the GROM. The GROM in the Inty serves...
... I tried something similar in an early version of Spirit. That was supposed to be a rotating 3D cube with full faces, using exclusively colored squares. But...
... Not necessarily - you could just have RAM that has a non-zero startup value. RAM is usually set to zero when you turn the power on, but there's no reason...
... Actually, most RAM has a garbage value at power-up, often related to whatever value it held before you shut it down if it was a short power-cycle period,...
... Could you just put a NOT gate on the input and output of certain bits? ... 512 seems like rather a lot! It would be nice, of course, to have as many as...
... For something as small as these RAMs in modern technology, it's probably possible. It'd bloat the bit-size though, which is why you'd have to make the...
... The sinclair spectrum did that. The colour information was 3 bits foreground, 3 bits background, 1 bit for "bright/dark" and 1 for flashing (ugh!). ... ...
