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It's a trap!So I got a CPLD (not the eventual one I want to use for the ethernet project - rather, one I actually have here and now, an XC9536 in a PLCC44). And…
... this prototyping session was to test my concepts of the execution ... wrote it to flash - the test rom just prints "I trapped ... code such as:
call 0x3FFD
defb 0x01
routine to call. I'll probably test this concept this ... -
Routine in HexadecimalHello!!! I was trying to get the following routine in Hexadecimal: LD IX,16384 LD DE,6912 LD A,255 SCF CALL 1366 RET I tried to …
... trying to get the following routine in Hexadecimal:
LD ... A,255
SCF
CALL 1366
RET
Silent ROM Beeper Routine in SpinA new year -- a new idiot question! :) I've been playing around with Spectrum sounds of the old, beepy kind. When I wiggle[1] the speaker 'by hand' …
... Specrum's own ROM 'BEEPER' routine (48k ROM) in Spin 0 ...
LD DE,400
CALL $03B5
RET[/CODE]
General purpose full screen input routineHi Folks, One of the things that annoyed me back in the 1980s with most BASICs was the lack of a full screen "formatted" input function. You could …
... ) I have written an XINPUT routine for the Spectrum (in BASIC ... program is the XINPUT routine plus a test harness that shows each ... *---------------------*
9010 REM PSS-XINPUT Routine
9020 REM Parameters:
Screen$ command, ROM routineHi All, Does anyone know which ROM routine to call for the Screen$ command (and/or the ATTR command)? Any comments on how well it works or the spee…
... /> Does anyone know which ROM routine to call for the Screen$ command ...This might be something new[img]http://www.711chan.org/test/src/130427925559.png[/img] Have a look at this screenshot of my emulator ZX82. Notice the copyright message? That's…
[img]http://www.711chan.org/test/src/130427925559.png[/img]
< ... /M syscalls as well as call the BASIC routines, or DOS ... be done instantly if the routine was recoded and running on ...Keys redefine routine and key check.I have written some asm code which allows me to redefine keys (for a game etc.), and also allows me to be able to check any keypresses for the redefi…
... ld hl,msg_right
call print_message
ld hl, ... ld hl,msg_pause
call print_message
ld hl, ... br />
; ----------------------------------------------
; ROUTINE: print_message
;
; prints a ...Tile based graphics and scrolling thingy...Here's my best attempt so far at a tile based rendering and scrolling routine. It draws in 22 8*8 graphics tiles along the top of the screen (junk i…
... tile based rendering and scrolling routine.
... but as a test of the routine it serves ... 8
scroll_down_loop call scroll_down ; scroll_down
call draw_tile_line
jp start ...Using the ROMs PRINT routineI really am starting from scratch again it seems, but how do you utilize the ROM routine to print characters, I think you point te BC register to an …
... do you utilize the ROM routine to print characters, I think ... containing the character codes then call 1601.
I think ...The INPUT command routine ($2089)I was looking at the INPUT routine with a view to modifying the intro so that I could pre-load the workspace and edit an existing value, rather than …
... at the INPUT routine with a view to ... /> [code]
CALL 0F2C,EDITOR Now get the ... flag indicating
CALL 21B9,IN-ASSIGN syntax, ... br /> [color=red]CALL 111D,ED-COPY The ...new Loading Scheme, test in real spectrum this weekendThis weekend i will test a loading Scheme real Spectrum, i make a demo, to test it, and record video in a given mobile. I did some calculations, and…
... i make a demo, to test it, and record video in ... speed load.
I test runtime at speed 1095 Bytes ... /s
The next test if work, test 1240 B/s and ... i need make somethink to test it work.
I ... a fake?
I need call WorldWinner if it run?
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... =carriage return
call rst16replacement ; basically the routine replaces rst16
... /> printacharacter
call getchradd
call copytoscratch
call populatecoords
call shiftscratch
syntax checking helpcan anyone help with syntax checking, its been a while since I did any basic extension coding this routine always gives :C nonsense in basic error …
... routine always gives :C nonsense in basic error on the call to ... )
CH_ADD points to "test" CODE 60000,200 $0D
DEFW STK_FETCH
CALL copy ;GET FILENAME
CP ...Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…
... 'm trying to write a routine that plots 3 pixels to ... /> push bc
call $22E5 ;call ROM plot routine
pop bc
push bc
call $22E5 ;plot 2nd
pop ... b
push bc
call $22E5 ;plot 3rd
pop ...Adding a pause key to ArkanoidHaving rediscovered the simple pleasure of playing 1980s games on genuine 1980s hardware, I've also remembered that emulation can provide a feature m…
... in-game controls. To test my hypothesis, I put ...
So, we have a routine implementing the pause function; where ... ?
[CODE] call 0xfcb5 ;0xfcb1
ret nc ... breakpoint, assemble the keyboard routine and load it into ...Troublesome routine, help needed!Having problems with this routine, it basically fires a rocket up the screen, but refuses to detect collisions. I'm using attribute blocks for detect…
Having problems with this routine, it basically fires a rocket ... tried allsorts to remedy this routine but nowt seems to work ... /> push bc
call print ;call the print routine
pop bc
ld bc,33
call 8252
ret
av1 ...Math Quiz - MultiplicationThe topic is fast multiplication routines, from 8x8 to 32x32 and all points in between. These functions sit underneath floating point libraries, gen…
... is, jumps to the 8x8 routine.
The second ... of 16 cycles. The test outweighs the speedup of using ... .
The second test will be the same except ... ; save HL
call l0_mulu_24_16x8 ; ahl = HL * E
Unusual custom turbo loaders - with sourcesI have always been fascinated by turbo loaders; my games all feature a TZX version with one of such schemes implemented, and I have been experimentin…
... CODE]
; Biturbo 1 loading routine
; by Giovanni "G.B ... JR NZ,65380
CALL 65481
JR NC, ... JR NZ, 65380
CALL 65481
JR NC, 65371 ...
RET
CALL 65485
RET NC
test.zip]Example files[/url ...Fuse bug? Strange T state countingI was testing delay routine presented [URL="http://www.worldofspectrum.org/forums/showthread.php?p=214851"]here[/URL]. I'm reproducing its listing: …
... br />
[CODE]; Z80 delay routine
; by Jan Bobrowski, license ... . I made following program to test this:
[CODE ... /> LD BC,141
CALL DELAY
RET
... contains Jan Bobrowski's DELAY routine) and executing in Fuse ...Simple text scrolling routine...I'm having trouble writing a very simple text scroller, the idea is to use the ROM printer routine to print 32 characters each time the routine is ca…
... to use the ROM printer routine to print 32 characters each ... time the routine is called, updating the de ... text
call attr ;call colour changer
call print1 ;call print
... br /> ld bc,32
call 8525
ret
Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …
... with the pixel address rom routine at 8874.
Going ...
ld c,0
call 8874
ld (hl),a ... be holding 128 after the routine is run?
ToboWANTED Machinecode Routine for Paging in Betadisk TR-DOS v5 ROMI try to build a small MCode-program which writes the TR-DOS-ROM v4 / v5 to RAM adress 40000 an up. It´s working on TR-DOS v4 / Betadisk 48k: C…
... v4 / Betadisk 48k:
CALL 15366 ;TR-DOS v4 #3C06 ... ,0 ;Set DOS Routine 0 (INIT/RESET DOS)
CALL 15635 ;TR ...Text scroller and custom fontYesterday I was testing this text scroll routine taken from Jonathan Cauldwell's Intro Maker (labels have been inserted to allow partial code relocab…
... testing this text scroll routine taken from Jonathan Cauldwell ... 00001
CALL 8252 ; PR_STRING
L_35381: CALL 00654
... /> L_35387: HALT
CALL 00654
INC E
DEFM " THIS IS A TEST MESSAGE. "
DEFM " ...I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…
... how the PIXEL-ADD rom routine works.
My code ...
ld c,1
call $22AA
ld (hl),a ... , I'm assuming the rom routine at $22AA will convert the ... [/img]
After the call, I'm not using the ...High score table routineI wrote this general purpose high score table routine. It stores 5 scores and displays them alongside the player names, which are 8 characters long. …
... high score table routine. It stores 5 ... CALL PRINT
CALL WAITING
RET ; exits the routine ...
PRINTNUM: ; routine ...A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... [code]
;Redefine Keys routine
;By Ast A. ... /> call 8859 ;inside ROM routine BORDER ($2294)
call 3503 ... call 8252 ;print string
;A crude debounce routine ... routine destroys it
call $3b5 ;ROM beeper routine< ...Passing parameter from BASIC to assembler routineWas there a "clean" way of passing parameter(s) from a BASIC program to an assembler routine? Something like parameterising RANDOMIZE USR call? I fac…
... to an assembler routine? Something like parameterising RANDOMIZE USR call? I faced ...Is it possible to run a single BASIC line via a ROM CALL of the Standard ZX 48k ROM?On: https://cygnus.speccy.cz/popis_trdos-assembler.php I found the following code: [code] CHADD equ 23645 ; Location of SOS variable CHADD ld…
... ; CHADD now points to our routine
call 15619 ; ENTER TRDOS SAVE ... point from which the whole routine was called
ld ... />
ld (TEMP),HL ; The routine for LOAD now repeats
call 15619
BACK ld HL ...
