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ac.tomo

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About ac.tomo

  • Birthday 06/29/1970

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    s.wales
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    internet surfing, computers in general, programming, many others non computer related.

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  1. Thanks for that but I'm actually after enlarging gr.0 text horizontally as well as vertically in bitmap gr.8. I've seen it done scrolling but can't remember the names of the demo's I've seen it in. I could do it but would like to see the demo's, again, to see the popular method. I know it's all bit shifting like rybags mentioned in 16x16 bit blocks.
  2. Can anyone name a couple of demo's for me that increase and decrease the size of Graphics 0 text, it's one of the programs that I intend to put in my book, but thinking off the top of my head there are a couple of ways of doing it, I just want to see the popular way most coders do it. Thanks.
  3. Just thought I'd give you an update on the next new book on text and graphics for those who are interested, I actually had more than I thought I had left to do and the reason why it's taking so long is that I don't have a lot of time in the week to work on it, but rest assured that it is progressing but will be a number of months away from finishing at the mo.
  4. you mentioned you have a graphics book? Could I get a link please? Thanks.

  5. Hi, I've had to restore my altirra emulator but can't setup a drive and folder to load/save my basic files, any help please.
  6. I'm hoping someone can help me find some .GAM files I made years ago, they're called "ACT01.GAM" to "ACT45.GAM", also "BTWO.GAM" files. I have some in BANDIT file format but I didn't convert them all (from CON.KIT .GAM files to BANDIT files) back in the day.
  7. Interesting... I'm never used bpl/bmi this way but then I haven't read a 6502 manual from cover to cover. So, in this case #21 - #16 leaves a positive result and thus can branch thru bpl (correct?) or does the 128 bit still get involved?
  8. You can actually get any type of branch you wish with the existing branches, as you know: BCS is => and BCC is only < but if you: BCC dest1 and BEQ dest1 then you now have branch if < or = too, also: BEQ dest1 BCS dest2 now gives you branch if equal to dest1 and branch if > (only) to dest2 You also have: BCC dest1 branch only if less than to dest1 BEQ dest2 branch if equal to dest2 BCS dest3 and branch if > to dest3
  9. Many thanks for that guys, this above explanation will help me remember (a bit!)
  10. I asked this question a while back but do you think I can find the thread!? Can someone please remind me with the correct BCC or BCS results to this: LDA $MEM_LOC CMP #50 BCC or BCS blah I can't remember which is 'less than' 'equal' or 'greater-than' if you know what I mean?
  11. I won't say too much because the solution to this 'flickering problem' is detailed in my graphics book, but using this method can give a little flickering but if the luma's aint too far apart between the two modes then flickering would be at a minimum. If the luma's were the same there would only be a few graphics 0 character pixels that show flicker and that would be more minimal. EDIT: and if you shifted the Gr.0 & gr.12 font characters left one bit and redefined the gr.12 font slightly flicker really would be more minimal again. EDIT2: AND In fact, the odd Gr.0 bits that don't get covered by a gr.12 bit-pair pixel CAN be covered, so you'll get that tiny bit of colour outside of the gr.0 bits but I don't believe there'll be any flicker then at all with the slightly higher lum gr.0 bits.
  12. @patjomki, it is actually possible to do what your trying to do, there's actually a couple of methods, basically, one way is to switch DL's between graphics 0 and graphics 12, you could use the same DM for both screens and change the character-set so that its fine for graphics 0 but altered a bit for the graphics 12 characters, you could also use different DM's which would give you more options.
  13. I've just got back from getting the disk and trying it out, your correct DMSC, not that I thought you were wrong, I just felt adamant that it would work as it was (as this is how I remembered it), I don't remember the ",16" being in the original program, obviously by the look at it it was, somewhere along the line this ",16" has been overlooked, I could see that the USR argument required some bytes on the stack but I thought the OPEN operation done that, obviously not, but thanks for making me see the correct method, otherwise there would have been an error in my book. Thanks again.
  14. To be honest I haven't "made sure" about this issue as my 65XE is down my mothers and not up my flat and I only have one DOS 2.5 disk and for some reason the disk is loading slow and troubled and there's obviously some problems there, actually I'm just going up my flat now to 'hopefully' find a working disk to try, I do understand completely what your all saying, I do know the PLA's are looking for what would be the ",16" lsb/msb's but for some reason I seem to remember it working as it is, it isn't actually my program, I got it from somewhere several years ago, I'll get back to you when I've tried a working disk.
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