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Need in beta-taster`s helpHello to all. I have developed hard-soft emulator of ZX Spectrum 48, but there are problems in work. My topics is: [url]http://www.worldofspectrum.or…
Structure of numeric arraysHi all, I have saved from my spectrum a numeric array using 'SAVE "array" DATA a()'. I now have the resulting file on my PC and I am trying to get …
... is a function of the RST $28 FP_CALC routine which pushes a ...IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... the intervening operator. So perhaps RST $20 is used to scan ... stack the logical operator, call RST $28 and then call FP_TO_BC to ...IN or INKEY ?just curious which is better to use.. I have a menu done.. and use 6/7 to go up down it + space to cycle thru the options (using inkey).. obv. if I w…
... stack the logical operator, call RST $28 and then call FP_TO_BC to ...Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
Use the calculator, stack the numbers and calculate with RST #28Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
... value
call STACK_BC
rst #28
db #05 ;/
db ...Calculating percentage..or even calculating percentage. Maths and asm I find verryyy tricky. Can anyone suggest the easiest/best way to calculate a percentage from two 1…
... ,hl ;undo USR
GETARG: rst $20
call SCANNING
rst $18
cp ","
jr ... ,100
call STAKBC
rst $28
defb $04,$01,$05 ...M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?
...
CALL $2d28 ;STACK_A
RST $28 ;FP_CALC
DEFB $04,$38 ...M/C mathsHow would I do the equivalent of LET A=B*7 in machine code?
... the calculator stack
* Call $28 FP_CALC to do the multiplication ... be stacked prior to a RST $28 by calling $2ab6 STK_STORE, and ...Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…
... faster? Think of intercepting the RST $28 opcode for example, to intercept ...Would anyone be interested in......Hi, I'm wondering if there would be much interest in an expansion card for the speccy that gives a VGA output with enhanced gfx & sound capabilities…
... faster? Think of intercepting the RST $28 opcode for example, to intercept ...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…
...
stack A : stack B : rst $28 : divide : end_calc
stack C ... : stack D : rst $28 : divide : add : end_calc
... be done in a single "rst $28 ... end_calc" sequence?[/QUOTE]
... stack C ; stack D
rst $28
divide
st- ...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…
...
stack D
rst 28h ; a, b, c, ...
stack A : stack B : rst $28 : divide : end_calc
stack C ... : stack D : rst $28 : divide : add : end_calc
... in a single "rst $28 ... end_calc" sequence?[/QUOTE]number padding functionI wrote a number padding function in BASIC a while ago, but when I came to want it again I couldn't find it, so I've done this enhanced [url=http://w…
...
call $33b4 ;STACK_NUM
rst $28 ;FP_CALC
defb $2e ;str ...question re. STR$ 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 -1Help needed... RND in machine codeI have been battling away trying to convert a simple BASIC routine (below) to machine code, but to no avail. The routine is used to fire 2 bullets a…
... = calculator code for VAL
rst $28 ;FP_CALC
defb $34,$B0 ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Disentangling your code looked too much trouble, so I wrote a quicker BASIC version then an assembler version of that (although that's rather slow even so). It could be written to run more quickly by not using the FP calculator but I expect that it would ...Graph Plothi! please, help with code: [PHP]For x=-100 To 100 For y=-100 To 100 If (x/2-25)*(x/2-25)+(y-50)*(y-50)<200 Or (x/2+25)*(x/2+25)+(y-50)*(y-50)<200 th…
Here's a much quicker version; the BASIC now only takes 50 seconds, and the assembler is reduced from 318 secs to 17 secs. There's still scope for further improvements. The significant change is that it only executes the inner Y loop with valid plot points ...calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
[CODE] rst #28
db 34h ; ; 34 stk_data< ...RND cyclical behaviourGood evening. I'm playing with RND function to show its cyclical behaviour, i.e. after 65536 calls to it, the next one will return the same value of …
... = calculator code for VAL
rst $28 ;FP_CALC
defb $34,$B0 ...Converting an integer arbitrary large binary number into a printable decimal formThis was asked a long ago at the comp.sys.sinclair newsgroup. At that time, I came up with a solution by extrapolating the classic algorithm of suces…
... the number in BC
rst $28 ;FP_CALC
defb $34,$40 ...
add a,48
rst $10
inc bc
Maths problemHi guys! I'm having a bit of trouble with a small section of code in Basic. I am spinning a wheel around with numbers 0-9 on it (think of the code w…
... the Spectrum's calculator at RST &28.
Calculator literal & ...Disappearing/appearing effectI remember doing a small routine in BASIC which could be used to cover the attributes section randomly, until all 704 characters were filled with the…
... stack U unplotted pixels #
rst $28 ;FP_CALC calculate R mod U ...Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…
... 30000
RNDFUN: di
rst $28 ;FP_CALC
defb $A0 ;const_zero ... code for 'VAL'
rst $28 ;FP_CALC
defb $34,$B0 ...So it occurred to me; "Why bother with going into 48K BASIC when you can just....wrap the machine code calls inside a 'RST #28;DEFW addr:RET'?" Of course, you DO need a small M/C routine to do that, and ta-daaa, here it is: [cod…
... "goes into 48 mode", the RST #28 DOES provide a sort of ...So where is the random number in the Speccy ?So I am messing around with ZX Spectrum Assembler and I want a random number. I looked up previous posts and one of the links said that random number…
... STACKA
CALL GETRND
RST $28 ; FPCALC
defb $04 ; multiply ... ,(SEED)
CALL STACKBC
RST $28 ; FPCALC
defb $A1 ; stk ...Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…
... calculator is via the [b]RST $28[/b] call followed by a ...
