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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 ...saving part of a BASIC programHere's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to …
Here's a short routine to save part of a BASIC program. The idea is that it can be merged into a program and then used to save sub-routines, etc. to be combined or merged into other programs. It's sort of a slow version of copy & paste. The two line ...AND,XOR,OR,BIT,RES,SET,CPL,NEG,RLC,RRC,SLA,SRL,RL, RR,SRA for BASICAs this was drifting away from the original INKEY$ thread I thought that I'd create a new one. So here's a routine to provide all of the above mentio…
... ;to calculator stack: A
FPTOBC: equ $2da2 ;from calculator stack: BC< ... br /> FPTOA: equ $2dd5 ;from calculator stack: A< ... ,
call EX1NUM ;stack 2nd variable
call ...Procrustean PrintingHere's a short routine to manage printing of text with command tokens, to avoid messing up the screen when they are expanded. It just prints as many …
... $2bf1 ;from calculator stack: AEDCB
FPTOBC: equ $2da2 ;from calculator stack: BC
FPTOA: equ $2dd5 ;from calculator stack: A
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 the ...
FETCHS: equ $2bf1 ;from calculator stack: AEDCB
CH_ADD: equ 23645 ...Undefine functionHere's a routine to selectively remove variables from the VARS area and reclaim the space. This can be done partially from BASIC already by assigning…
... was fetched off the calc.stack, as the command line would ... LOOK_VARS
FETCHS: equ $2bf1 ;calculator stack to AEDCB
E_LINE: equ ... /> CH_ADD: equ 23645
;stack function parameters passed from BASIC ...simplest method to pass a string to m/code?The statement "RANDOMIZE numvar+USR mc" is a simple way of passing a single numeric parameter to a m/c routine, as mc can retrieve numvar from the to…
... from the top of the calculator stack. I've been trying to ... code to adjust the machine stack and then a call to ... the string details onto the calculator stack before they can be taken ...need a new method for m/c parameter assignmentI've been using a variable length function of the form: "FN a$(a$,a[,b...,z])=STR$ USR md" to search a data table and return a string result. By putt…
... value" on the calculator stack and manipulating the machine stack before the RET ... taking the parameters off the calculator stack with SCANNING but then I ...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, but ... .5,b,1,a2 for calculator stack
ld c,(ix ... .5,b,1,a2 to calculator stack
ld (23653),de ;STKEND ...handy method for passing m/c parametersI knew that a single number or string parameter could be passed to a m/c routine with either: [b]LET a=b+USR address[/b] puts b on the calculator st…
... ]
puts b on the calculator stack; or
[b]LET a ... pointer to "abc" on the calculator stack.
Then I recently ... b & c on the calculator stack. Unfortunately it doesn't work ... ; c & d on the calculator stack, and it can be done ...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…
... , y and r onto the calculator stack and used CALL #232D and ...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…
... #2DA2 ; unstack BC from the calculator stack - all will become clear in ... M/C routine on the calculator stack before calling my 'interface routine ...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 ... ,(SEED)
call $2d2b ;STACK_BC stack the number in BC
calculator stack (apart from the change to ...How to return to basic properly from ASMI am messing around with a fast stack copying routine. But I am getting "A: Invalid argument" error when I later return to basic. I know you h…
... messing around with a fast stack copying routine.
But I ... save all registers on the stack (including the shadow registers) before ... registers is used for the calculator stack or something? I'm not ...BASin Release 9a availableJust a quick not to say that an updated (ie, bug fixed) BASin is available. A list of what's new for release 9: Fixed a bug in the line tokeniser th…
... Map. Just watching the machine stack busy with the Interrupt Service ... revealing.
First the machine stack a blur with priorities, saved ... recursion.
Then above, the calculator stack with the results of TAN ...Program sizeI am typing a basic program into a ZX and I need to find out exactly how much memory it is using. Is there a way to calculate this? :confused:
... free memory from the machine stack.
An unused routine in ... used that subtracts the machine stack from the start of free ... the possibility of overwriting the calculator stack or the text you typed ...I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …
... /> CALL _ROM_BC_TO_STACK ; Put divisor in calculator stack
LD HL, (_RANDOM_SEED)
I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …
You are right, Geoff!!! :)
And I've found another little bug: I must put dividend before divisor in the calculator stack.
Thanks again. Now it works! :DNew Functions for Sinclair BasicA total of 52 new functions can be added to Sinclair BASIC; 26 numeric functions (A-Z) and 26 string functions (A$-Z$). Owing to the internal structu…
... Memory Map window, highlighting the calculator stack. From there you can watch ...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…
... BC on top of the calculator stack
LD A,note
calculator stack
CALL 03F8 ; aforementioned entry ...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…
... BC on top of the calculator stack
LD A,note
calculator stack
CALL 03F8 ; aforementioned entry ...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…
... BC 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 entry ...Mess around with basicIf you have a game that was written in basic, e.g Football Manager, how do you look at the code that was used? thanks
... of pushing values to the calculator stack etc, but at the end ...Homing missile routine - help neededI am attempting to write a routine which will allow a missile to home in on a player. Basically the sort of thing you see in most shoot-em-up games. …
... ' theorem. Unfortunately it uses the calculator stack which is a little slow ...how to pass arguments from Basic to MC ?can someone explain me (or give some link) how to pass arguments from basic to machine code? i mean something like this: PRINT USR xxxxx, arg1, arg2:…
... 's possible to use the calculator stack to pass values into your ... calculator, and this includes how to pass in values via the stack ... something like "zx basic rom calculator" may do it - I found ...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…
... to experiment with the calculator stack then just stack values directly from registers ... /> CALL $2D28 ; STACK-A
RST 28H ; enter calculator
DEFB $28 ... result and remove from stack
RET ; empty stack
...Which would be fasterSay you want to use a variable value of 0 to 255 in a BASIC program, which way would be fastest? Say for arguments sake you wanted to use two variabl…
... be plonked straight on the calculator stack. This does waste space though ...Which would be fasterSay you want to use a variable value of 0 to 255 in a BASIC program, which way would be fastest? Say for arguments sake you wanted to use two variabl…
... 5-byte address off the calculator stack and then checks free memory ...Speed of variables vs. POKE/PEEKGreetings, I'm sure I could probably find this out after careful study of the 48K ROM disassembly, but I was wondering whether someone already knew …
... of values onto the Spectrum Calculator comprises of the physical(?) pushing ... of 5 bytes onto the calculator stack. This will be push a ...
