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Help! Reverse engineering a Spectrum game[deleted]
... code rather than call out to a subroutine. It is ... everywhere then you would have to search and replace it all ... code...
BTW - "Number to string converting routines" would be used ... screen. I should have wrote "Integer to string converting routines". -
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…
... variables are defined, all 26 string variables (A$-Z$, the name ... are defined and all 26 integer arrays (A()-Z(), the ... [LIST]
[*]base+0 = pointer to string
[*]base+2 = length of ... +4 = absolute maximum length of string
[/LIST]
Additional ... -
Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... printing a hex representation of 32 bit numbers.
< ... code]
; write unsigned decimal integer to ascii buffer
... 10 iterations (versus 32 on a naive division ... compute_lp
; write digits to string
; ix = char ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... (scr_out_col), a
cp 32
ret c
... inc a
cp 32
jr z, .nextline ... HL = pointer to string
; DE = pointer to end of string
putstode ... isbool, 0
SYM_TBL_ENTRY "integer?", isinteger, 0
SYM_TBL_ENTRY ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... (scr_out_col), a
cp 32
ret c
... inc a
cp 32
jr z, . ... HL = pointer to string
; DE = pointer to end of string
puts_hltode ... isbool, 0
SYM_TBL_ENTRY "integer?", isinteger, 0
SYM_TBL_ENTRY ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... (scr_out_col), a
cp 32
ret c
... inc a
cp 32
jr z, . ... HL = pointer to string
; DE = pointer to end of string
puts_hltode ... isbool, 0
SYM_TBL_ENTRY "integer?", isinteger, 0
SYM_TBL_ENTRY ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... (scr_out_col), a
cp 32
ret c
... inc a
cp 32
jr z, . ... HL = pointer to string
; DE = pointer to end of string
puts_hltode ... isbool, 0
SYM_TBL_ENTRY "integer?", isinteger, 0
SYM_TBL_ENTRY ... -
IN command in BASIC to read keyboardThis weekend on a Sinclair meeting we had some BASIC-games using IN to control the character. The maker of the game assumed that the result of an IN …
... some BASIC-games using IN to control the character. The maker ... be 191, making it impossible to play it on ANY Spectrum ... /> Here's a tip how to avoid this:
First ... OTHER KEYS
100 GO TO 20
1000 REM ... -
Questions about BasicHi everyone, I am Max, student of media studies in berlin, and I have to do a little project on the spectrum. I am working on a sinclair zx spectrum…
... BASIC programming in order to get to know the medium ... some answers, ways how to program these things on ... 1. This was just to show how to work with arrays / ... the value of a integer or string, I don't know ... programming it's about getting to know the machine.
... -
Parallel to serial z80 i/o portI have an Opus Discovery and an Alphacom 32 printer. I want to see if I can make a cable that will use the Opus Parallel printer port. The question i…
... Discovery and an Alphacom 32 printer. I want to see if I ... question is how to map the Alphacom 32 pins to the Opus printer ... Opus manual and the Alphacom 32 manual.
[url=https ... />
However on the Alphacom 32 they also mention
A2 ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... a
ld bc, 32
ldir
pop ... a
ld bc, 32
ldir
pop ... /> inc a
cp 32
jr z, .nextline ...
; C = value to draw as cursor
undrawcursor ...
; HL = pointer to string
puts:
ld ... -
Compilersaside from SE Basic Compilers, what are some other good ones? Personally im afetr HISOFT Compiler for 128k, but if theres any others it would be nice…
... for simple "write a program to work something out" concepts, I ... anything that was ever released to work within the Spectrum ... just about anything, floating point integer or string.
The ... 128K version comes very close to ... -
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…
... trying to figure out how to invoke the LOOKVAR ROM routine to discover ... set the values of Basic integer and string variables from machine code ... -
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…
... set the values of Basic integer and string variables from machine code ... just can't get zx_setstr to work.
It looks ... source string. Can't figure out what BC is supposed to do ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... 20 for n=1 to (256-32)
30 print ... /> You could also continue to use index instead of addresses ... want a temporary variable to hold that value if ... redo the d_Print() routine to print a maximum of ... alpos, 32); // print a max of 32 chars from string alpos at ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... compiler would have used integer division to compute the result (both ... () takes as argument a string to be printed that contains format ... in the printf() format string above is how we can ... , there is a problem with integer to float conversion. "(float)(a) / ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... " which translates into two integer adds to the pointer "g_land". As ... many times before adding an integer to a pointer is not simply ... itself (and modern compilers for 32-bit systems generally are smart ... h which returns both the integer division result and the ... -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... we're moving it to column 32 and row 0). ... is called to write 32 zeroes to clear all 32 columns horizontally ... {
memopd(disp, disp, 32, 8); // scroll scanline left ... are non-standard additions to string.h and are described ... -
Printing in 64 columns, from Basic?Not strictly a Sinclair Basic question but... Is there any known machine code utility that allows something similar to PRINT AT that can be called fr…
... /> x= Row number to print at.
y$= string to be printed.
to call it once.
< ... AT x,xx;CHR$ (cc-32): GO TO 2090
2044 GO ... AT x,xx;CHR$ (cc+32): GO TO 2090
2070 IF ... cc>32 AND cc32 AND ... -
Seeking alternatives to DATA statementsAnyone know of any memory saving alternatives to storing a list of numbers, other than using DATA statements or poking data into addresses?... Im ti…
... ASCII characters from space (chr$(32)) to copyright (chr$(126)) is ... br />
Convert each number to a character representation e.g ... $(72+32) = 72
To decode, read a data string and ... of the character, READ another string. Space character = 0 will ... -
Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
... that in a loop to print a full string. Alternatively, there's ... a 'print string' routine at 0x203C which takes ... a string address in DE and a ... , you need to set up the printing routines to point to the upper ... -
Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
Thanks a lot for your answers all three.
[QUOTE=Dr BEEP;485247]
RANDOMIZE USR adres= lower screen
PRINT "" AND USR adres = upper screen and undoing print of BC on return[/QUOTE]
Is this the same as below?
... -
Assembly Programming for IDIOTSOk are there any websites guides for what opcodes do in a z80 or books... but for really really thick people like me :-) Something along the lines …
... and peripherals (hardware) to name some of the important ... from scratch how to string instructions together to perform maths, program ... explains everything you need to know about display generation ... /Issue05/Pages/[/url] Pages; 32,33,34
Issue6: ... -
Copying a SCREEN$ in ZX BASIC in 1 second?!Following on from the revived "[thread=20207]Saving a complete SCREEN$ in BASIC[/thread]" thread (although Arjun really only needed a suitable POKE i…
... requested parameters for up to two (optional) string variable definitions (destination & ... SUB 32: CLEAR udg-18-1: GO SUB 31: GO TO 40 ... (23627): LET defadd=23563
32 LET udg=FN p(23675 ... /> 41 REM TO COPY string to RAM or RAM to string or RAM to RAM
New platform game: Sid SpannersHi all, here is my Christmas present. A new platform game (well, more of a mini-game really). [url=http://java.cms.livjm.ac.uk/homepage/staff/cmspc…
... archive, so thanks yet again to Martijn for uploading the updated ... and I'll have to rename it to "Sid Spanners 3: The ... . However, they instead go down to "00" lives remaining. (they ... routine which converts an integer to a decimal string is only expecting a ...Copying a SCREEN$ in ZX BASIC in 1 second?!Following on from the revived "[thread=20207]Saving a complete SCREEN$ in BASIC[/thread]" thread (although Arjun really only needed a suitable POKE i…
... FN m$() which handles string slicing in both destination ... lines 45-50) takes 32 seconds rather than 8 ... restores the plain command to line 14 (if necessary ... $ and B$,
to make room for possible ... (VAL "nnnnn" TO VAL "nnnnn").
15 ...The Silly Thread.We've not had a silly enough thread in quite a while. So here's a thread to compensate. [img]http://images3.wikia.nocookie.net/__cb20110828185317/t…
... br />
I used to use hyper-thread and hyper ... care of the 32 bits of string needed to make it work ... , use 64 bits of string, so you need a quad ... strand wool yarn. However, to get that much wool, ewe ... need to have a pretty powerful herd ...The Silly Thread.We've not had a silly enough thread in quite a while. So here's a thread to compensate. [img]http://images3.wikia.nocookie.net/__cb20110828185317/t…
... =Scottie_uk;614842]I used to use hyper-thread and hyper ... care of the 32 bits of string needed to make it work ... , use 64 bits of string, so you need a quad ... strand wool yarn. However, to get that much wool, ewe ... need to have a pretty powerful herd ...The Silly Thread.We've not had a silly enough thread in quite a while. So here's a thread to compensate. [img]http://images3.wikia.nocookie.net/__cb20110828185317/t…
... [QUOTE=Scottie_uk;614842]I used to use hyper-thread and hyper ... care of the 32 bits of string needed to make it work ... , use 64 bits of string, so you need a quad ... strand wool yarn. However, to get that much wool, ewe ... need to have a pretty powerful ...
