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Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... mapped into the z80's address space whereas on the msx ... 2068 about twice as fast to manipulate screen memory as the msx ... sprites can be drawn quickly to screen and without colour-clash whereas ... games on the Spectrum tend to be smooth pixel scrollers, something ... -
The New SPIN releases ThreadOk, as I'm now working on SPIN again full-time, and as a very wise man once said, "Release Early, Release Often"[1]... I'm going to release new SPIN…
... will be enhancements - a 640x480x8 screen with the adlib or soundblaster ... 256 colours, PRINTing to any position on the screen (as there will ... location, then loads the OS to virtual address zero.
We ... -
Timex Sinclair 2068Hi guys. This is my first post here, the first of many, I hope.. :) I have a Timex Sinclair 2068 but don?t know much about it. It was given as a gif…
... (as opposed to having to remember what the last frame address was and ... and the screen address stored in the struct_sp1_update for the char to figure ... was using this to alter sprite colours depending on screen position and ... -
Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…
... , you usually see "something" on screen, as most chips die with ... set to 1 or reset to 0, which pretty much alters screen (look ... is set to that address. That's why on startup the screen appears ... and the Spectrum came back to life. To accomplish this, though, I ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... 's an Issue 2). Screen stays black for the right ... lines up and down the screen as normal, (c) 1982 ... lines up and down the screen are. I get that ... sagged just enough to cause things to not power down, ... the P-RAMT (IIRC) to that address minus one (always wondered ... -
Bubble Bobble EditI thought I might have a go at editing Bubble Bobble myself after reading this... [url]http://www.worldofspectrum.org/forums/showthread.php?t=15452[…
... after another. Taking the 1st row yet again >
... therefore be first segment on row 2.
So poke ... the level data before going to screen.
[QUOTE= ... column(7),type(8 ),row(0),direction(8 ) so ... purposes as the row only works to a degree on ... -
My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... code]
16-BIT SCREEN ADDRESS IN BINARY
... ;
; Fades current screen to black ;
;---------------------------------------------------------------;
... -
My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... .
All you need to do do is after performing ... , if the D register (hi-screen address) >= 88, you know that ... -
My little first set of routines.Hi all, I just coded a little set of routines just to draw a screen on video mem and a fade out. I could have just copied the screen rendering rout…
... ; ;
; Moves the screen address down 1 line ;
; Written ... screen address
sub 32 ; and try to move up by 1 character to ... -
Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... there three blocks of screen then, instead of ... br /> [code]
16-BIT SCREEN ADDRESS IN BINARY
==========================
... /> where:
BB = screen block (0-2)
SSS ...
Adding 1 to the screen address in the first block ... -
Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... of the way the screen is organized which ... br /> [code]
16-BIT SCREEN ADDRESS IN BINARY
==========================
... /> where:
BB = screen block (0-2)
SSS ...
Adding 1 to the screen address in the first block ... -
Reason for strange display layout?I have always wondered if there is any technical reason behind the strange layout of the display file or why did Sinclair choose to do it this way?
... are amortized down the screen. Eg, in the ... /> [code]
; Adjusts screen address HL to move one pixel down in ... screen.
;
; enter: HL = valid screen address
; exit : Carry = moved off screen ... redraws the listing on screen, the speed of ... -
Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…
... this memory block back to the place where Screen$ is stored ( ... command and then copy the screen$ to that address. Copying 6912 bytes would ... the copy goes from the screen to memory. You can poke ... may be able to take your screen$ down to half to a third size ... -
Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…
... command and then copy the screen$ to that address. Copying 6912 bytes would ... into DE is the destination address for the copy and the ... the copy goes from the screen to memory. You can poke values ... may be able to take your screen$ down to half to a third size ... -
Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…
... it from that memory locations to back to screen?
[QUOTE ... and then copy the screen$ to that address. Copying 6912 bytes would ... the copy goes from the screen to memory. You can poke ... may be able to take your screen$ down to half to a third ... -
Sceen$ helpMost people have used screen$ at some time or another and for me what I want to do is use it or something like it as a start screen before the game p…
... example, study:
To copy SCREEN$ to memory address 32768
LD ... BC 6912 ; length of screen area ... program
To move it back to the screen area
How did games started with LOAD "" CODE auto-start?Some early games (l remember for example [B]Galaxians[/B] from 1982) was loaded with LOAD "" CODE, which in one single block first loaded the loading…
... block first loaded the loading screen, then rest of the game ... in memory (due to the game loading both screen and code together ... line". And/or "Jump to X address if error" so machine code ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... some data... if HL points to the data, you can do ... not necessary at all to load the screen address into A (as in ... done directly at the memory address?
Do you save ...Comments for small "sprite" routine wantedI have just written my first machine code program and I am quite happy (and proud) to get it working! :smile: As a child I never learned anything e…
... necessary at all to load the screen address into A (as ... done directly at the memory address?
Do ... then it's generally better to do "RR (HL)". It ... only have 1 access to screen memory (which can cause ... that's something to worry about much later :)).How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... a,(hl) ; get key row to scan, top byte of ... select which key in row to pay attention to
inc hl ... table of 5 (keyboard row, return value bit mask ... input subroutine address. Then a call to that address will ... it very easy to implement user-defined control ...How does interrupts work?I am a little confused regarding the interrupts on the Spectrum. If I have some hundred bytes of machine code started with, say, [B]RANDOMIZE USR 300…
... get 224 cycles per pixel row (this includes left and right ... no make sure no updates to the screen area of the memory ... see tearing along one pixel row as the back buffer is ... buffer before copying the result to screen. There is no flicker on ...Cannon BubbleHello! I would really like to transffer this game ( [url]http://cezgs.computeremuzone.com/eng/card.php?id=14[/url] ) to my REAL +3 disk drive. Becau…
... data to disk (address followed by length):
$4000,$1B00 loading screen ... eg. from DOS: copy /b screen.tap+code.tap+page1.tap ... CLEAR 24537
20 LOAD "" SCREEN$ : LOAD "" CODE 24538
... would probably be "neater" to set the breakpoint at $6126 ...Cannon BubbleHello! I would really like to transffer this game ( [url]http://cezgs.computeremuzone.com/eng/card.php?id=14[/url] ) to my REAL +3 disk drive. Becau…
... data to disk (address followed by length):
$4000,$1B00 loading screen ... eg. from DOS: copy /b screen.tap+code.tap+page1.tap ... CLEAR 24537
20 LOAD "" SCREEN$ : LOAD "" CODE 24538
... would probably be "neater" to set the breakpoint at $6126 ...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…
... write output (eg print text to the screen). Instead C is extended ... keyboard) and writing output (eg to the screen). There is "stdlib" which ... one integer, equivalent to adding 2 to the address since integers are two ...Zenobi/ZodiacHas anyone ever seen any games from either Zenobi or Zodiac appearing on eBay or other shops? I don't have any original tapes from either of those co…
... when you wrote to the address on the loading screen, maybe they sent ... a list out to you ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... of would be to pre-calculate and store the address of the ... character at the end of each row to be ... the stack, thus blanking the row (as with all stack-pointer ... work, remember to disable interupts first, and restore ...How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... of would be to pre-calculate and store the address of the ... character at the end of each row to be ... the stack, thus blanking the row (as with all stack-pointer ... work, remember to disable interupts first, and restore ...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…
... ////////////// Blit the stuff from buffer to screen ////////////////
////////////////////////////////////////////////////////////////////
void ... with code.
Create address map file.
ORG address for code is 8000
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…
... buffer and copy the result to screen. Shift the pixels by 2 ... screen directly. With the screen scrolled left one pixel, the task is to ... () can be used to scroll a pixel row on screen left one pixel ... what pixel to plot on the right edge of the screen. If ...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…
... /> anything that has to do with drawing to screen (except the sprite package ... be a new memory address equal to the address of the string plus ... string, which turns out to be the address of the terminating '0 ... adding a number n to the address of an int is the ...
