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Z80, and 6502, in comparisonI was wondering about how each of these compared in terms of performance. The Commodore 64 had a 6502 @ 1MHz, and graphics processor VIC which took …
... rom has a floating point calculator (RST #28) but I don't how ... -
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 ... />
stack A : stack B : rst $28 : divide : end_calc
stack C ... : stack D : rst $28 : divide : add : end_calc
rst $28 ... end_calc" sequence? -
Indirect Variable AssignmentHere's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in var…
... put the value on the calculator stack and point CH_ADD to ...
FETCHS: equ $2bf1 ;from calculator stack: AEDCB
CH_ADD: equ ... -
calculator and sinusok, look at the Sysel's routine: [PHP]3 5b00 *s 4 5b00 tabsin = #7000 03 mksin 19.11.1995 Busy soft …
... #2d28;
12 800c ef rst #28 Vypocet 127.5*(1+sin ...
27 8024 se
28 8024 c9 ret
29 ... -
Elliptical ChallengeSubsequent to the recent "Graph Plot" thread, I wrote this general purpose ellipse drawing routine which will plot (although it doesn't actually use …
... hand", rather than using the calculator, it would be quicker, ... .5,b,1,a2 for calculator stack
... 5,b,1,a2 to calculator stack
ld (23653 ... call $2d28 ;STACK_A = xh
rst $28 ; : 0.5,b,1,a2 ... -
Hooky - hook ZX ROM and rewire RST and NMI to RAM - rantThis is a rather long rant. Not for short tempered. :) The objective is to hook into RST "vectors" and NMI on a Spectrum without affecting the normal…
... existing RST 0x00, RST 0x08, RST 0x10, RST 0x18, RST 0x20, RST 0x28, RST 0x30, and RST 0x38 ... did) and therefore hook into RST 28.
QUESTION: disclaimer ... ROM ... -
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…
... from BASIC
Call48 RST #28 ; call a routine in ... ; unstack BC from the calculator stack - all will become ... the value at 'addr'
RST #28 ; as above ^^
... /C routine on the calculator stack before calling my ... -
Random Numbers, USR Return Values & Timing BASICI've been trying out Jon Ritman's random number routine, published in Your Sinclair Aug'87. Apart from a timing comparison I also did a frequency ana…
... 4 of the "Machine Code Calculator" series in ZX Computing Jul ... the number in BC
rst $28
defb $3D,$38 ;restack ... at the top of the calculator stack (apart from the change ... -
Competition: Sadistick routine on Spectrum ROMMy vote goes to BEEPER at #03B5 Let's ear you pick! :) And a great BOHHHHHHHHHHHHH to Dr Ian Logan & Dr Frank O'Hara for their description about the…
... .
[/quote]
Hint: RST 28
[/quote]
calculator let alone on 'the' Calculator... :(
[TIME ... -
Competition: Sadistick routine on Spectrum ROMMy vote goes to BEEPER at #03B5 Let's ear you pick! :) And a great BOHHHHHHHHHHHHH to Dr Ian Logan & Dr Frank O'Hara for their description about the…
... on top of the calculator stack
RST 28 ; use the floating point ... calculator
DEFB A4 ; stk-ten ... A on top of the calculator stack
CALL 03F8 ; aforementioned ... -
Competition: Sadistick routine on Spectrum ROMMy vote goes to BEEPER at #03B5 Let's ear you pick! :) And a great BOHHHHHHHHHHHHH to Dr Ian Logan & Dr Frank O'Hara for their description about the…
... me the use of the calculator allways was a black art ... ,3
CALL PUSH_BC
RST #28
DEFB #05 ; division
Calling ROM routinesFirstly, sorry if this is the wrong forum to post this in, but I wasn?t quite sure under which heading is best fitted. I?m trying to figure out how…
... want to experiment with the calculator stack then just stack values ... ; STACK-A
RST 28H ; enter calculator
DEFB $28 ; sqr
DEFB ...Minor Update to Gasman's Midi2BEEPDon't know whether this is worthy an announcement, but for those of you who enjoyed Gasman's midi2BEEP utility, a new variant has been made called mi…
... (5/255)
RST $28 ; use the floating point calculator
DEFB $A2 ... add arbitary values to the calculator stack, so in order to ...Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …
... routine
RST $28 ; use the floating point calculator
DEFB ... (B)
RST $28 ; use the floating point calculator
DEFB $E3 ... (C)
RST $28 ; use the floating point calculator
DEFB $ ...Z80 RRCA instruction...Hi Folks, Well my exploration of Z80 MCODE continues apace! I am struggling to understand how the RRCA instruction works. The official Zilog manua…
... grips with the ROM calculator routines accessed via RST $28. Toni Baker's ... -comp/mccalc.zip]Machine Code Calculator[/url] articles give a thorough ...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…
... . I mean: to use the RST #28 calculator you need assembler. Why would ... slower than direct use of RST #28, but I don't think ... at the top of the calculator stack.
pop ... gives you the list of RST #28 subcommands needed for evaluating a ...Recent talk of developing new SpectrumsHi all, I can see from a few threads on here that some Wossers like Vasil and Aien 8 are interested in developing more powerful Spectrums or improvi…
... called using the RST 28 instruction to invoke the calculator. Subsequent instructions are ... :
[code]
RST 28H ;; FP-CALC add step ... instruction set that matches the calculator instructions take over, and execute ...Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…
... CALL 7341 ; 27952 205 173 28
CALL INITCHAN2 ; 27955 205 ... CALL 7341 ; 27969 205 173 28
CALL INITCHAN2 ; 27972 ... CALL 7341 ; 27986 205 173 28
CALL INITCHAN2 ; 27989 ... we use the ZX FP calculator
RST 40 ; 28054 239< ...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 …
... Toni Baker's "Machine Code Calculator" series in ZX Computing.
RST $28 FP_CALC routine which pushes a value onto the calculator stack ...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…
...
FETCHS: equ $2bf1 ;from calculator stack: AEDCB
STAKBC: equ ... $2d2b ;to calculator stack: BC
FPTOA: equ ... ,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?
... * Put the value on the calculator stack
* Put the ... 7) on the calculator stack
* Call $28 FP_CALC to do ... * Leave the product on the calculator stack
* Point CH_ADD ... a RST $28 by calling $2ab6 STK_STORE, and while within the calculator ...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…
... very familiar with how the calculator actually works -
BUT ... the RST $28 opcode for example, to intercept calls to the calculator 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…
... the RST $28 opcode for example, to intercept calls to the calculator and ...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 ... />
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]
...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 ... />
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]
