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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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 Posted: 01 Nov 2008 12:26:46 pm Post subject: |
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| whit interupts? |
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FloppusMaximus
Advanced Member
Joined: 22 Aug 2008
Posts: 472
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| Posted: 01 Nov 2008 02:53:24 pm Post subject: |
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Well, you could do that. The difficulty is that I'm not sure how accurate the normal timer interrupts will be, especially if you are using the standard TIOS ISR (which has many different possible code paths, meaning the time between interrupts will vary slightly) or if you're using, say, fastcopy (which disables interrupts for quite a long time every frame.)
I would either use a crystal timer, or else the old-fashioned way with a stopwatch.  The crystal timers have two advantages over the normal ones: they can be set to fire less often, and they continue counting after an interrupt occurs.
To use a crystal timer (note that of course this requires an 83+ SE or 84+), you would use an ISR that looks something like this:
Code:
Interrupt:
ex af,af'
in a,(4)
and 20h
jr nz,GotTimerInterrupt
ex af,af'
jp 38h
GotTimerInterrupt:
exx
call IncTimer
ld a,3
out (31h),a
exx
ex af,af'
ei
ret
IncTimer:
ld hl,(timeElapsed)
inc hl
ld (timeElapsed),hl
ld a,h
or l
ret nz
ld hl,(timeElapsed+2)
inc hl
ld (timeElapsed+2),hl
ret
This will maintain a 32-bit count of elapsed time in (timeElapsed). You would use something similar to count the number of frames displayed.
To install the interrupt, you'd do something like this at the start of your program:
Code:
di
; standard IM 2 ISR setup
ld hl,IM2Tab
ld de,IM2Tab+1
ld (hl),IM2Addr & 0ffh
ld bc,256
ldir
ld a,0c3h
ld (IM2Addr),a
ld hl,Interrupt
ld (IM2Addr+1),hl
ld a,IM2Tab / 256
ld i,a
im 2
; set up timer
ld a,45h ; timer frequency = 2048 Hz
out (30h),a
ld a,3
out (31h),a
ld a,128 ; interrupt will fire every (128 / 2048) = 0.0625 seconds
out (32h),a
ei
See WikiTI for other frequency values you could use. Make sure that the interval between interrupts is longer than the longest time you have interrupts disabled.
Finally, when you're finished, turn the timer off as follows (TIOS will crash if you leave the timer running.)
Code:
im 1
xor a
out (30h),a
out (31h),a
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darkstone knight
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Joined: 07 Sep 2008
Posts: 438
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| Posted: 01 Nov 2008 04:28:26 pm Post subject: |
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sounds complicated...
i guess im going to use the old-fashioned stopwatch + calucator combination  |
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Spencer
Advanced Newbie
Joined: 06 Nov 2005
Posts: 99
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| Posted: 01 Nov 2008 05:05:16 pm Post subject: |
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| If you just wanted to see FPS for debugging purposes, you can use wabbitemu. Keep in mind it calculates based off how often you update the screen (e.g. for a grayscale program it's not useful for calculating your FPS, just the grayscale interrupt's). |
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darkstone knight
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Joined: 07 Sep 2008
Posts: 438
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| Posted: 01 Nov 2008 05:41:54 pm Post subject: |
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its not accurate tho... if 11/900 != 66.5
another quistion:
for some reason, this code fails to see multiple keypresses: (ignore dutch comments)
Code:
getkey:
LD A, %11111110 ;group van pijltjes
OUT (1), A;senden
NOP \ NOP;wachten
IN A, (1);lezen
CP $FB;rechts...
CALL z,pressedright
LD A, %11111110 ;group van pijltjes
OUT (1), A;senden
NOP \ NOP;wachten
IN A, (1);lezen
CP $FD;links
CALL z,pressedleft
LD A, %11111110 ;group van pijltjes
OUT (1), A;senden
NOP \ NOP;wachten
IN A, (1);lezen
CP $F7;omhoog
CALL z,pressedup
LD A, %11111110 ;group van pijltjes
OUT (1), A;senden
NOP \ NOP;wachten
IN A, (1);lezen
CP $FE;omlaag
CALL z,presseddown
edit: not wait, i already optimized it to:
Code:
LD A, %11111110 ;group van pijltjes
OUT (1), A ;senden
NOP \ NOP ;wachten
IN A, (1) ;lezen
LD B,A
BIT 3,B
CALL z,pressedup;%11110111
BIT 2,B
CALL z,pressedright;%11111011
BIT 1,B
CALL z,pressedleft;%11111101
BIT 0,B
CALL z,presseddown;%11111110
MUCH better
Last edited by Guest on 01 Nov 2008 06:04:00 pm; edited 1 time in total |
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magicdanw
pcGuru()
Calc Guru
Joined: 14 Feb 2007
Posts: 1110
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| Posted: 01 Nov 2008 06:10:58 pm Post subject: |
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| Before reading the key port, you must output $FF to reset it. Then you can output the group number and receive the key presses. |
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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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| Posted: 01 Nov 2008 06:16:17 pm Post subject: |
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really?
because noting happens when i press any key other than the [arrows] or [clear]
Last edited by Guest on 01 Nov 2008 06:18:10 pm; edited 1 time in total |
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FloppusMaximus
Advanced Member
Joined: 22 Aug 2008
Posts: 472
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| Posted: 01 Nov 2008 07:42:30 pm Post subject: |
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| Your second example ought to work, so long as you add an FF output to reset the port. Your first example will not detect multiple keys at the same time (hint: the value in A cannot be both FB and FD simultaneously...) |
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benryves
Active Member
Joined: 23 Feb 2006
Posts: 564
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| Posted: 02 Nov 2008 09:01:00 am Post subject: |
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| Just to add another way of testing any speed on the calculator; I toggle the link port status every frame then have a program on my PC that monitors the port, counting the number of times it toggles per second. |
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darkstone knight
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Joined: 07 Sep 2008
Posts: 438
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| Posted: 02 Nov 2008 11:24:58 am Post subject: |
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benryves wrote: Just to add another way of testing any speed on the calculator; I toggle the link port status every frame then have a program on my PC that monitors the port, counting the number of times it toggles per second.
[post="128397"]<{POST_SNAPBACK}>[/post]
cool 
another quistion: 
for some reason, lines like this:
Code:
LD HL,(IX + Y )
give me label errors -.- (even if i use a real value instand of Y) |
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DigiTan
Unregistered HyperCam 2
Super Elite (Last Title)
Joined: 10 Nov 2003
Posts: 4468
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| Posted: 02 Nov 2008 11:54:14 am Post subject: |
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Oh yeah. that instruction actually doesn't exist. The HL left of the comma is a 16-bit location, whereas the (IX) data is only 8. In TASM, it will usually give you the "unused byte in MSB of ___" error. A close alternative is:
Code:
ld h,(ix+Y)
ld l,(ix+(Y+1))
Last edited by Guest on 02 Nov 2008 11:55:28 am; edited 1 time in total |
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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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| Posted: 02 Nov 2008 12:52:26 pm Post subject: |
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i guess the other way around:
Code:
ld (ix+Y),HL
is vailid?
edit: btw, you example is wrong, it stores stuff in big-endian...
Last edited by Guest on 02 Nov 2008 12:56:33 pm; edited 1 time in total |
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DarkerLine
ceci n'est pas une |
Super Elite (Last Title)
Joined: 04 Nov 2003
Posts: 8328
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| Posted: 02 Nov 2008 01:51:05 pm Post subject: |
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| You cannot use HL and IX (or HL and IY for that matter) in the same instruction. Try again. |
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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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| Posted: 02 Nov 2008 05:04:16 pm Post subject: |
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DarkerLine wrote: You cannot use HL and IX (or HL and IY for that matter) in the same instruction. Try again.
[post="128401"]<{POST_SNAPBACK}>[/post]
LD IX,HL
annyway... i stuck upon the folowing trouble:
.db sprite
this puts a string at the memory location.... i want the memory adress of sprite! lol |
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FloppusMaximus
Advanced Member
Joined: 22 Aug 2008
Posts: 472
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| Posted: 02 Nov 2008 08:16:43 pm Post subject: |
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| If you're trying to make a table of addresses, keep in mind that an address is a 16-bit value, so you need to use dw rather than db. |
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luby
I want to go back to Philmont!!
Calc Guru
Joined: 23 Apr 2006
Posts: 1477
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| Posted: 02 Nov 2008 08:52:01 pm Post subject: |
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darkstone knight wrote: DarkerLine wrote: You cannot use HL and IX (or HL and IY for that matter) in the same instruction. Try again.
[post="128401"]<{POST_SNAPBACK}>[/post]
LD IX,HL
annyway... i stuck upon the folowing trouble:
.db sprite
this puts a string at the memory location.... i want the memory adress of sprite! lol
[post="128403"]<{POST_SNAPBACK}>[/post]
Easy.
Sprite1:
.db %11111111
.db %11111111
.db %11000011
.db %11000011
.db %11000011
.db %11000011
.db %11111111
.db %11111111
gives you a 8*8 box @ memory location Sprite1.
Last edited by Guest on 22 Jul 2010 12:10:51 pm; edited 1 time in total |
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DigiTan
Unregistered HyperCam 2
Super Elite (Last Title)
Joined: 10 Nov 2003
Posts: 4468
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| Posted: 02 Nov 2008 09:44:52 pm Post subject: |
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darkstone knight wrote: i guess the other way around:
Code: ld (ix+Y),HL
is vailid?
edit: btw, you example is wrong, it stores stuff in big-endian...
[post="128400"]<{POST_SNAPBACK}>[/post]
Remember, since the ld (ix) instructions only load 1 byte, it's up to you -the developer- to decide which data to make little endian and which not to. As long as you're consistent. It's not until you get instructions like LD HL,(NN) or its analog LD (NN),HL, or using .dw where you're 'forced' to work in little endian.
Last edited by Guest on 02 Nov 2008 09:46:15 pm; edited 1 time in total |
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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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| Posted: 03 Nov 2008 04:11:32 am Post subject: |
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FloppusMaximus wrote: If you're trying to make a table of addresses, keep in mind that an address is a 16-bit value, so you need to use dw rather than db.
[post="128406"]<{POST_SNAPBACK}>[/post]
i tried that, but it still gies junk as my sprite....
@ luby... i want the ADRESS of the sprite, not the actual sprite..
Last edited by Guest on 03 Nov 2008 04:12:48 am; edited 1 time in total |
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calc84maniac
Elite
Joined: 22 Jan 2007
Posts: 770
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| Posted: 03 Nov 2008 07:50:55 am Post subject: |
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luby wrote: darkstone knight wrote: DarkerLine wrote: You cannot use HL and IX (or HL and IY for that matter) in the same instruction. Try again.
[post="128401"]<{POST_SNAPBACK}>[/post]
LD IX,HL
annyway... i stuck upon the folowing trouble:
.db sprite
this puts a string at the memory location.... i want the memory adress of sprite! lol
[post="128403"]<{POST_SNAPBACK}>[/post]
Easy.
Sprite1:
.db %11111111
.db %11111111
.db %11000011
.db %11000011
.db %11000011
.db %11000011
.db %11111111
.db %11111111
gives you a 8*8 box @ memory location Sprite1.
[post="128408"]<{POST_SNAPBACK}>[/post]
I am too lazy to actually make my own post so instead I quote people and then don't say anything new 
Last edited by Guest on 22 Jul 2010 12:11:10 pm; edited 1 time in total |
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darkstone knight
Advanced Member
Joined: 07 Sep 2008
Posts: 438
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| Posted: 03 Nov 2008 08:39:39 am Post subject: |
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calc84maniac wrote: luby wrote: darkstone knight wrote: (...)
[post="128403"]<{POST_SNAPBACK}>[/post]
Easy.
Sprite1:
.db %11111111
.db %11111111
.db %11000011
.db %11000011
.db %11000011
.db %11000011
.db %11111111
.db %11111111
gives you a 8*8 box @ memory location Sprite1.
[post="128408"]<{POST_SNAPBACK}>[/post]
I am too lazy to actually make my own post so instead I quote people and then don't say anything new
[post="128425"]<{POST_SNAPBACK}>[/post]
<rage>BUT I WANT THE MEMORY ADRESS OF THE SPRITE IN DATA
.....
</rage>
and no, .dw sprite does not work
Last edited by Guest on 22 Jul 2010 12:10:33 pm; edited 1 time in total |
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Z80 & 68k Assembly => z80 & ez80 Assembly
