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La Abadia Del Crimea - The definitive pollOn a scale of 1 to 10, vote on the score you think LADC deserves. Try and be honest at it while you can. ;) EDIT: This poll is effective for 2 week…
Hypersports had the 1st messing with the 'stack' to draw on the screen and 'pulling' graphic data using the stack and using bit 7 of the refresh register. Unless you know or earlier examples. LOL! -
La Abadia Del Crimea - The definitive pollOn a scale of 1 to 10, vote on the score you think LADC deserves. Try and be honest at it while you can. ;) EDIT: This poll is effective for 2 week…
... 1st messing with the 'stack' to draw on the screen and 'pulling ... ' graphic data using the stack and ... -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... switch to RAM 7 to draw it.
I could ... data onto the stack, and draw them all from that stack data afterwards. -
Memory mapping: Pentagon compatibility?I'm writing something that will rely heavily on the Spectrum's ability to switch screen buffers in hardware (port 0x7FFD). The original Spectrum 128K…
... switch to RAM 7 to draw it.
I could ... the relevant data onto the stack, and draw them all from that ... stack data afterwards.[/QUOTE]
... -
checking bits in BASICThe question of manipulating bit patterns in BASIC was raised recently in this [thread=35728]Keys redefine routine and key check[/thread] thread. I s…
... know/want using the Spectrum stack-calculator to make room, so I ... -
Buffer to screen - how much?[FONT=Calibri][SIZE=3]I am starting to build a new game and am researching different ways to accomplish what I need to do. My question is, is it poss…
...
2) Use the stack the draw up the screen
draw instructions interact for a reduced ... -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
Could you use the stack to draw a 16x16 tile to the screen efficiently? I was considering the above routines, and it occurred adding 20 bytes each line might make the routine a little slow... -
Subtract 4 from an addressThis is a novice Z80 question really: I'm trying to vertical scroll my back buffer, but I'm not sure of the quickest way to apply an offset and mo…
[quote="Atari_Jetman;834137"]Could you use the stack to draw a 16x16 tile to the screen efficiently?[/quote]
Yes, this is exactly how BIFROST*, NIRVANA and NIRVANA+ work. The source codes are available at the link in my signature below. -
They are not Mutually Exclusive Younger people tend to use New Tech more . They say things like "XYZ subject is just great on "You Tube" . So why bother with the Spectrum stuff? M…
... I want to use the stack to draw on the screen while ... -
Need a pointer to using the spectrum calculator from MCHi all, Can anyone point me to a good resource on using the spectrum calculator stack from machine code? I need to work out the number of seconds f…
... resource on using the spectrum calculator stack from machine code?
calculator (to me anyway!)
logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... commands needed for the ROM calculator to evaluate a logical expression ... logical expression and output the calculator commands, with an option to ...using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…
... use the ROM's FP calculator to evaluate any FP expression ... commands without breaking out to stack some other element of the ... />
stack A : stack B : rst $28 : divide : end_calc
stack C : stack D ...CIRCLEHi, I'd like to draw a circle x,y,r using the BASIC-ROM subroutines. I've put x, y and r onto the calculator stack and used CALL #232D and RET. I g…
... ,
I'd like to draw a circle x,y,r ... , y and r onto the calculator stack and used CALL #232D and ..."ZX80 Brain" RPN CalculatorIt is at times like [url=https://www.worldofspectrum.org/forums/discussion/54176/depression]when threads such as this are posted[/url] that I get the…
... bit ambitious to make a calculator with all the scientific ... by zero
- the stack won't fill beyond 17 ... to PRINT something on the stack, and POKE 23607,60 ... number is moved up the stack. I've used the ... number is put into the stack).
Whatever I ...Vector drawing routines.Anybody could point me to some sort of vector drawing package of routines, callable from BASIC? With "vector drawing" I mean to draw 2D pictures with…
... creation of the exit stack (in C you can ... to draw lines, etc, instead of say the ti calculator's ... was told. About the stack depth required by the ... get away with much smaller stack usage. The amount of ... are currently stored on the stack. You can actually see ...can someone help with a rom routinei have been trying to draw a simple line with a the rom routine , but i just cant get it to work , so if anyone can give me an example in z80 that wo…
... the part which uses the calculator stack. The routine takes its ... the signs of the DRAW parameters which are held ... to the BASIC line DRAW 0,175 would look ... CALL 24BAH
Or to DRAW ?255,0
LD ...
Note that these will draw from the current COORDS, and ...How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... re using to call LINE-DRAW isn't quite right. Although ... br />
To get your DRAW 10,10 example working try ... /> call $24BA ;call LINE-DRAW (skipping initial stack instructions)
exx
calculator stack, so the first thing they ...How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... re using to call LINE-DRAW isn't quite right. Although ... br />
To get your DRAW 10,10 example working try ... /> call $24BA ;call LINE-DRAW (skipping initial stack instructions)
exx
calculator stack, so the first thing they ...How works the Line-Draw ROM routine ?The 'complete spectrum rom dissasembly.pdf' show info related to the draw rom subroutine. The Line-Draw require two sets of parameters: X,Y coordinat…
... into the stack just to call the main line-draw address ?
calculator stack (note, this is not the ... same as the return-stack, accessed using the PUSH and ... in pushing them onto the calculator stack and then calling a routine ...question re. STR$ bugCould someone point me to whereabouts in the ROM this goes wrong? [code]PRINT PAPER 5;1;STR$ 234[/code] (Only the "1" prints in cyan.) It's not the m…
This routine (48 bytes) provides a BASIC replacement for STR$ which fixes those two bugs; use "FN s$(numeric_expression)" instead of "STR$ numeric_expression". I copied the ROM's method used in CIRCLE & DRAW for checking -1SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ROUTINE
org 0x2382
draw:
rst get_char ; get ... /> call stack_a ; A to calculator stack
fwait ; enter calculator
fsub ; x ... br /> fce ; exit calculator
call draw_line ; draw next arc
...Drawing a dotted line...Hi Folks, I cannot be the first person to want this (?) so here goes! Does anyone have a MC routine that does the same as the BASIC DRAW command bu…
... straight lines the whole $2382 DRAW routine, which takes up seven ... =175+USR DOTS: REM DRAW coords on calc.stack
30 PLOT ... /> ld (23653),hl ;restore the calculator stack pointer
ret
Peeking the contents on screen? How?You will have to forgive me for growing up on the C64, but I know I can peek the location of a character (1024 is top left from memory) and the peek …
... ;831969"]Simplest way is to draw things in different colours then ... .
JP L2D28 ; forward to STACK-A to store result
calculator stack but the PEEK equivalent has ...Line DemoI was looking in the source code of another game (that Akalabeth game), with lots of line drawings. The difference was that they don't use the PL…
... the parameters in the calculator stack van X,Y naar ... />
rst 28h ; calculator start
defb 03h ; subtract ... />
rst 28h ; calculator start
defb 03h ; subtract ...
call 24B7h ; call DRAW-LINE
exx< ...Akalabeth gamei found now that someone ported an ansi-basic game (coded in 1979?) to msx-basic - what about a zx-spectrum basic version of it? ;) https://plus.goo…
... initially just replacing the DRAW statement in line 404 with ... -2)
call STKSGN ;DRAW X parameter
ld a ... -1)
call STKSGN ;DRAW Y parameter
call $24b7 ... ,a ;store signed A on calculator stack
rla
sbc ...Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
...
CALL 11560 ;put to calculator stack
LD A,50 ;Y ...
CALL 11560 ;put to calculator stack
EXX
PUSH HL ...
EXX
CALL 9335 ; draw
EXX
POP HL ...Why no PLOT, etc. on bottom two lines?I was pondering if there was any way to get PLOT, etc. to address the full screen from BASIC without having to write a few lines of assembler to bypa…
... full screen PLOT & DRAW, with a little demo to ... calculator stack. Remember that on the Spectrum PLOT uses absolute values but DRAW ... /> ;Full Screen PLOT & DRAW, Y=0 to +191
PLOT: defw Plot191
DRAW: defw Draw191
...Drawing LinesHas anyone got any experience of coding a Bresenham line drawing algorithm on the Speccy? I've had a go and I find the algorithm has quite a few s…
[quote="Timmy;951339"]The DRAW routine in the Spectrum ROM ... /> The ROM routine DRAW at $2382 uses the calculator stack extensively (because it ...
