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#1
avatar_zhulien
Programming / Re: CPC interrupts, frame flyb...
Last post by zhulien - Today at 06:39
Let's say in a terminal case, I guess it's u likely I would need to update very fast anyhow, either due to a new character typed or a scroll.  Probably I am best to keep a dirty flag and refresh the screen after x freshest (x being what feels reasonable) as I would be doing full screen redraw but irregularly (compared to a game).
#2
Audio-wise, the next evolution of the Commodore 64 was the Ensoniq digital sampling keyboard.
#3
A
Games / Re: MODE 1 > MODE 0 wishlist
Last post by Anthony Flack - Today at 05:54
Imagine, get it?
#4
A
Games / Re: Bad CPC games you can't he...
Last post by Anthony Flack - Today at 05:47
Oof, yeah I struggle to enjoy Prehistorik 2 as well.

If Roland in Space/Time are "bad", then those are bad games I like. I liked Roland in the Caves too, although it really needed more levels.

And yeah we all have bias. I know Xyphoe doesn't care much for isometric games; me I thought they were great. And I see one of my favourite CPC games, Radzone, only gets 5/10. on CPCGR.

Oh I know a really bad game I liked. I'd probably struggle with it now because it's so slow, but I had fun trying to figure out Streaker as a kid. It's like a Magic Knight game, but very weird. I also have a real fondness for Technician Ted which most people probably don't feel.
#5
avatar_Interrupt
Games / Re: MODE 1 > MODE 0 wishlist
Last post by Interrupt - Today at 01:37
I had a bit of fun tonight inspired by Anthony Flack's Mode 1 Bombjack and Xyphoe's recent playing of Green Beret. I had a go at imagining what that game might look like in Mode 1 (with some raster effects for the top and bottom for extra colours). I traced over a Mode 0 screen shot and I'm sure someone could do a much better job but it was a fun exercise. No idea if it is really practical from a coding point of view but it's always fun to imagine.
#6
MSX and Apple2 sometimes using one and sometimes another system. Atari ST, Amiga and PCW german version have () on 89 keys, but english on 90.
Place for CapsLock, Ctrl, Alt keys jumps in different computers either. Only Atari ST and use early IBM PC places, what happend?
Delete sometimes is on left from Backspace and sometimes on right, why?

C= C16, C116 and C+4 compatible machines, but each of them chars £*= have in different places. For what?

I don't understand why Amarican and British keyboards swaps " and #. In 8bit times everybody had British system with " on 2, even USA. So WTF?
#7
I have too much on my plate! Ok, we are all in that case ; yet you might be interested in contributing, especially if you're using the tool or plan to.
The time investing in improving the tools will be recouped!

CRTC Emulation

The Z80 is pretty complete, it would be very useful to have CRTC emulation as well. CRTC 1 for a start!

CRTC internal registers detection

I'm using the MF2 to get CRTC registers (R0, R1, ...) at breakpoint.
Now, I'd like to get the internal register (C0, C4)
This can be done by e.g. measuring time to next halt, next vsync, etc.
On CRTC 1 the status register gives the "Display Enable" flag (off for Border), which can be useful.

Persistent monitor screen

When exiting monogams (the monitor), its content is lost. I am not content.
It should be stored (would also allow to scroll up to see past output).
Just storing the variable-size text lines, not the full screen!
Just two routines:
append_line
; Append line to the history
; IN: HL = Null-terminated string

get_line
; IN : A = line number in reverse order (0 being the most recent)
; Out : If line still exist:
          Carry is set
          HL = pointer to Null-terminated string (in rotating history buffer)
      ; Otherwise, NC
 

Wait! I could reuse my command-history manager. Just switching the &100 buffer for a &800 buffer.
#8
avatar_abalore
Games / Re: Bad CPC games you can't he...
Last post by abalore - Yesterday at 22:20
Quote from: Shaun M. Neary on Yesterday at 21:15And for the record, I was the one who glowingly reviewied Alcon 2020... wait... wasn't that one of yours? ;)


If you think you rated the game higher than it deserves feel free to lower it. That's not a problem to me.
#9
The Amiga is mostly a continuation of the Atari 8-bit line (for obvious reasons). The ST is a lot more like the CPC or Spectrum in that most things are achieved through sheer CPU grunt.

The C64 was mostly an evolutionary dead end, although you can see similar traits in dedicated games consoles I guess.
#10
The ST does feel a bit like a 16 bit CPC. The CPC itself is a bit like a BBC crossed with a Spectrum.

Commodore had their own chip factory so all their machines are full of kooky custom chips that set them apart from everyone else.
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