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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…
... of commands needed for the ROM calculator to evaluate a logical expression ... logical expression and output the calculator commands, with an option to ... -
ROM Calculator TrigHello, These Christmas holidays I finally have time to devote myself a little to the speccy . I have a question about how the ROM calculator implem…
... a question about how the ROM calculator implements cosine.
I ... same approximation used in spectrum ROM just a simpler procedure.
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?
ROM code because, as in the ... /> I have Ian Logans Spectrum ROM Disassembly book but it deosnt ... explain how to use the calculator (to me anyway!)
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…
... off the calc.stack, as the command ... /> RECLAIM2: equ $19e8 ;ROM routine RECLAIM_2
SCANNING: ... ;ROM routine LOOK_VARS
FETCHS: equ $2bf1 ;calculator stack to ... 23645
;stack function parameters passed from BASIC ...need a new method for m/c parameter assignmentI've been using a variable length function of the form: "FN a$(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 ... about 24kT but the prior ROM call to the $27BD "Scanning ... taking the parameters off the calculator stack with SCANNING but then I ...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…
... -ROM subroutines. I've put x, y and r onto the calculator stack ...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 ... routines in the 48-BASIC ROM, there is no need to ...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:
... the machine stack.
An unused routine in the ROM is used ... that subtracts the machine stack from the ... caters for any section of ROM and allows for maskable and ... 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)
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…
... ; ROM routine to put value of BC on top of the calculator stack ...
LD A,note
CALL 2D28 ; ROM routine ... to put value of A on top of the calculator stack ...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…
... ; ROM routine to put value of BC on top of the calculator stack ...
LD A,note
CALL 2D28 ; ROM routine ... to put value of A on top of the calculator stack ...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…
... ; ROM routine to put value of BC on top of the calculator stack ...
RST 28 ; use the floating point calculator
ROM routine to put value of A on top of the calculator stack ...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 ... correctly without the original ROM in place so I ... seriously considering a two ROM approach to any future ... it if the original ROM is present when any ... called from the old ROM. The only thing necessary ...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 ... for 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…
... /> "Rubber Numbers in the Spectrum ROM" - a very helpful article.
calculator stack then just stack values directly from registers ... /> CALL $2D28 ; STACK-A
RST 28H ; enter calculator
DEFB $28 ...My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
... Needle;178639]Is your emulated ROM write-protected? tbh, I can ... my head whether the Spectrum ROM destroys itself otherwise.[/QUOTE]
The ROM does attempt some writes to ... destacking a value from the calculator stack.Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... ;16K ROM, stacks BC onto calculator
let equ 2AFFh ;16K ROM, 'LET ...
cheat equ 1731h ;16K ROM code that does Ccan 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…
... 9146 (23BAh)
The ROM line-drawing routine proper starts ... takes its parameters from the calculator stack in the same way as ... the part which uses the calculator stack. The routine takes its start ...MOD calculator function?How do I for example, do LET a=(MOD n,9). I can do it a long winded way using cross-addition until the answer is a single digit. So 13763 MOD 9 wou…
The calculator's n-mod-m function ... leaves two results on the calculator stack - the DIV value on top ... .
As an experimental ROM, modify OR to do the ...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…
... , I find the whole rom calculation routines something of a ... add arbitary values to the calculator stack, so in order to ... stack, but actually a command code to tell the rom ... calc routines in the rom are sort of a ... beep routine in the rom already seems to make ...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…
... from the top of the calculator stack, not from the BC,DE ... ;call LINE-DRAW (skipping initial stack instructions)
exx
pop ... of ROM routines expect their parameters to be on the calculator stack, so ... useful to skip over these stack instructions.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…
... from the top of the calculator stack, not from the BC ... ;call LINE-DRAW (skipping initial stack instructions)
exx
... of ROM routines expect their parameters to be on the calculator stack, ... useful to skip over these stack instructions.[/QUOTE]
problem with DEFADD storageI have a function: DEF FN t(t$,m,t)=USR t which is called with, for an example: LET bc=FN t("t$()",mcworkspace,mcputt) where, at the time: mcworkspac…
... , you could hook into the calculator ROM routines as follows:
< ... places this value on the calculator stack
- Call 0x2DA2, the ... pops a value from the calculator stack and returns it in BC ... direct route with less register/stack juggling, but this is ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... was a routine in the ROM to evaluate expressions which might ... it must be using the calculator functions to evaluate expressions, ... it was putting on the calculator stack, as the basis for the ... use the calculator functions, but getting things on the stack in the ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... A$ and C$ are at calculator stack, ready to be used as ... used in the ZX-PC ROM:
PRINT USR 14500 ...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…
... A$ and C$ are at calculator stack, ready to be used as ... a REM statement.
;ROM routines needed
SCANNING equ ... numbers are now in the calculator stack.
call STK_TO_BC ;So ...Fast LogsAnyone know of a fast ln function I can steal? The ROM function seems to be hideously slow. I wrote a look-up table dirty and less accurate sin func…
... calculator stack stuff; which is what you'd expect from a basic ROM ... if the SE basic ROM uses the calculator better than the original ... sinclair rom, then that's ... also implement SQR as a calculator based routine using the ...Operator ANDHi I'm trying to write some very simple game in ZX Basic, but I guess I've forgot most of it because I can't understand why simple IF....THEN sequen…
... on the calculator stack. It's sorted in the GW03.rom. Try entering ...List of existing games that needs a port to zx spectrumPlease post here the games that exist in other platform(s) but does not exist in speccy. Please keep in mind this is not a to-do list, so don't hesti…
... would be to modify the ROM and intercept calls to the ... />
Except that trapping the ROM routines for floating point is ... , precisely because the Sinclair BASIC calculator stack just isn't fast enough ...List of existing games that needs a port to zx spectrumPlease post here the games that exist in other platform(s) but does not exist in speccy. Please keep in mind this is not a to-do list, so don't hesti…
... />
Except that trapping the ROM routines for floating point is ... , precisely because the Sinclair BASIC calculator stack just isn't fast enough ...
