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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 ... -
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…
Here's another wacky routine. This allows assignment of values to variables where the source & destination variables can themselves be defined in variables (or expressions which evaluate to variables). Some of this can already be done with VAL or VAL$, ... -
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…
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stack A : stack B : rst $28 : divide : end_calc
stack C ... : stack D : rst $28 : divide : add : end_calc
rst $28 ... end_calc" sequence? -
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 …
... 0
rst $28
defb $A2 ;const_half< ... call $2d28 ;STACK_A
rst $28 ; : 0.5,b,1 ... 2d28 ;STACK_A = xh
rst $28 ; : 0.5,b,1,a2 ... -
Macros and PasmoHi guys. I'm starting out with Pasmo for writing some stuff for the +3, and i'd like to use Macros for the calls to the BASIC ROM, where' you'd othe…
... write something like:
[code]RST $28
DEFW RoutineAddress[/code]
MACRO CBAS RoutineAddress
RST $28
DEFW RoutineAddress
ENDM ... -
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…
... machine code calls inside a 'RST #28;DEFW addr:RET'?"
... from BASIC
Call48 RST #28 ; call a routine in ... the value at 'addr'
RST #28 ; as above ^^
addr ... 128K Spectra uses the RST #28 to call routines in ... -
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 …
... has a floating point calculator (RST #28) but I don't how ... -
New SPIN 0.3a releaseHi all, here's the next version - mainly a maintenance release, with new bugs :) Here's what's new: V0.3a - Bugs and more tapes -------------------…
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original
--------
EF RST #28
EF15 DEFW #15EF
D7 RST #10
patched
URGENT programming question !I've gotta draw a line from machine code using the standard routine at 24B7, which expects the delta-X and delta-Y values on the BASIC stack. I put t…
Hey, mystery solved !!! I know how to do it - I push X1 and X2 on the stack, call RST #28 to subtract them, push Y1 and Y2 on the stack, call RST #28 to subtract, and call the DRAW routine.]
Can't believe it was so easy. :)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]
On 2005-05-02 17:23, AE.Vasconcelos wrote:
Nope... Floating point in assembler is too much for me to handle.
[/quote]
Hint: RST 28Competition: 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…
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…
... of the calculator stack
RST 28 ; use the floating point calculator ...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…
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. …
... could use the FP Calc (RST 28) in the Rom, but this ...Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
... two more bugs :
28 ) Enter debugger. Go right down ... it thinks $0000 contains the RST 28 ($EF) opcode.
29 ...Spin problems/issuesI am running Spin 0.666 and have noticed a few issues (some are bugs, some might be just me). I am using Vista sp1 (yeah I know!), and I've seen Dunn…
[QUOTE=Jimmy;278083]28 ) Enter debugger. Go right down ... it thinks $0000 contains the RST 28 ($EF) opcode.[/quote]
Haven ...+3 BASIC and RST 8I've been working on adding commands to the BASIC interpreter, in a similar style to how Interface 1 does it (catch the RST 8 error trap). This works…
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…
... of duration (5/255)
RST $28 ; use the floating point calculator ...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) …
... Stack via Rom routine
RST $28 ; use the floating point calculator ... Rom routine: Duraton (B)
RST $28 ; use the floating point calculator ... Rom routine: Pitch (C)
RST $28 ; use the floating point calculator ...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…
... ROM calculator routines accessed via RST $28. Toni Baker's excellent series ...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 ... slower than direct use of RST #28, but I don't ... my expression string.
rst 30h ;Make some space into ... gives you the list of RST #28 subcommands needed for evaluating a ...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…
... faster than the built-in RST #28 forth-like interpreter.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…
... routines are called using the RST 28 instruction to invoke the calculator ... example:
[code]
RST 28H ;; FP-CALC add step ... an FPGA, because when the RST 28H instruction is read, instead ...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…
... an FPGA, because when the RST 28H instruction is read, instead ... the Z80 from fetching the RST 28. (There's some more detail ...
