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Switching 48/128 modes within a BASIC programI'm not sure what use this would be; ie. being able to switch between 48k and 128k modes and back again from within a continuously running BASIC prog…
... few opportunities to reduce the size, however I didn't test ... you want to reserve a stack position, or recover a value ... -
real value of some of these books as learning aids?Ok, I admit perhaps it was a late night and frustration. :???: I could have been hallucinating when i was doing the typein. But I think not.. [url]…
... was about 20 times the size..![/QUOTE]
Although it ... space is reserved on the stack and the fill routine exits ... -
Mini scroll routineI'm looking for a routine that scrolls a small section of the screen downwards and replaces it with nothing, 2 x 2 charcter blocks to be precise, to …
... is not optimal in either size or speed.
[CODE ... ;save current line on teh stack
call nextlinedn ;and put ... address table and manipulates the stack pointer, so is a fair ... -
my tiny intros[IMG]http://pouet.net/screenshots/60493.png[/IMG] [url]http://pouet.net/prod.php?which=60493[/url] the following work will appear behind Demosplash…
... was obsessed - to continue intro size of 64 bytes, e.g ... /> push hl; stored on the stack
dec hl: ld e ... " look, which can reduce the size of the code:
l ... more convenient to raise the stack (1b/3b)
pop hl ... -
Wolfenstein / Doom for 48k SpectrumHi, is there any game / demo of this kind that runs on 48k machines? Thanks.
OK Guys, I've updated the TAP version to include digital audio by default, and moved the player code to Uncontended RAM making it sound much better.
I've also made the IDEDOS / +3 disk version which includes a cheat menu and in-game level skip ... -
Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... adressing for things such as stack pointer (I do it by ... *rel_table=new vector();
// Size must be the same.
int total_entries=rel_table->size() / 2;
char lo, hi ... -
BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... wrong return address in the stack entry addressed by (ERR_SP). The ... put the stack below $C000 which reduces the loadable program size by ... that restriction by putting the stack down in the display file ... -
BIN2BAS (load BASIC text into emulator) utilityI've nearly finished testing this. It allows a BASIC program to be loaded from a text file in any emulator which has a "load binary" option. I was wo…
... simpler way of handling the stack conflict - I use a "roaming ... routine will then switch the stack to that low address whenever ... the program expands the temporary stack stays ahead of it all ... the maximum (tokenised) BASIC program size which can be loaded on ... -
running this game in zxspin assemblerHello all I've written this game out in the zxpin assembler. [url]http://chuntey.wordpress.com/2010/01/12/tutorial-zx-spectrum-machine-code-game-30-m…
... as you know where the stack pointer is* (the 'notebook' ... chuntey blog).
*[SIZE="1"]so as Arjun says ... CLEAR 32999, this means the stack pointer moves down from this ... builds up away from the stack.
** as a fun ... the screen memory!
[/SIZE] -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... that STACK[1] becomes STACK[0], STACK[2] becomes STACK[1], STACK[3] becomes STACK[2 ... ], and finally STACK[0 ... positions (assuming a Spectrum level size limited to 24x32 as usual ... -
pathfindingworking on pathfinding in the game. here is Russian description of Lee's algorithm: [url]http://algolist.manual.ru/games/wavealg.php[/url] "if-then"…
... to the same stack. Thus the maximum size for each stack is about ... -
Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... , or to fiddle with the stack directly. Larger functions run the ... around handling structs on the stack) which I would see an ... has most impact on code size and code performance.[/QUOTE]
Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... allocating local variables to the stack rather than to registers. If ... ] that allocates blocks of fixed size. z88dk has the same in ... maintained, one for each 'slab size' to borrow your terminology. The ... slab table to select slab size and a block is returned ...Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... access individual bytes on the stack...
[elided]
... _G.omitFramePtr 1, sym->stack 4, size 2
65 ;fetchPairLong ... _G.omitFramePtr 1, sym->stack 2, size 2
73 ;fetchPairLong ...Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... already pushing die size.
The lack of stack relative addressing ... other third parties, the word size was increased to 16 bits ...Relocation with SDCCI desperately need auto- relocation with SDCC. Something that will compile all of my code using start address 0 and generate relocation table so that…
... (the subroutine cleans up the stack before returning).
stack 4, size 2
65 ;fetchPairLong ... _G.omitFramePtr 1, sym->stack 2, size 2
73 ;fetchPairLong ...Fantasy Z80 instructions?This follows on from something catmeows said in another thread, and that I've been meaning to ask for a while. This may sound daft to people with mo…
... to/from the stack. This can cut code size and cycles a ... a couple things that made stack handling more efficient though I ... new mode using HL or stack relative instructions? Not sure, it ...Games Club June 2013espanner selectiona thiso weeko Zolyx - Firebird Software Ltd Mad Mix 2 - Topo Soft Enchanted - Positive [IMG]http://thumbs.dreamstime.com/z/spa…
... with Mr Stack that each level is a fair size - I spent ...The game I have just reviewed on Spectrum 2.0 is...Future Looter [url]http://www.spectrum20.org/reviews/3097[/url] After Alessandro's recent thread about cynical WoS scoring I came to realise that a…
... cause;710517]Which of Jumping Stack's childhood favourites shall I ... ? Have a pop at that [[SIZE="1"](didn't like that ...The game I have just reviewed on Spectrum 2.0 is...Future Looter [url]http://www.spectrum20.org/reviews/3097[/url] After Alessandro's recent thread about cynical WoS scoring I came to realise that a…
[QUOTE=Jumping Stack;710528]I chose to rise ... ? Have a pop at that [[SIZE="1"](didn't like that ... either)[/SIZE][/QUOTE]
I think ...The game I have just reviewed on Spectrum 2.0 is...Future Looter [url]http://www.spectrum20.org/reviews/3097[/url] After Alessandro's recent thread about cynical WoS scoring I came to realise that a…
[QUOTE=Jumping Stack;714651]Extraordinary levels of activity ... :-o. For shame!
[SIZE="1"]*and all other right ... when they see one :razz:[/SIZE]24-Wide or 26-Wide Multicolour Tile EngineI've been playing about with more multicolour routines (8x1, 8x2 etc.) and have one a bit clever and suitable for a tile-based game. No particular d…
... alternative for a grid that size is unrestricted 8x2 multicolour.
stack and do POP AF to ...Serious SpectrumHas anyone here used their Spectrum for anything other than gaming and programming back in the eighties? I see all these business and productivity ap…
... visitors).
Sjaak had the stack of hardware ready in his ... /> [FONT="Book Antiqua"][COLOR="Blue"][SIZE="3"]"Sinclair timing" - by Sjaak ... />
Sjaak Sinke"
[/SIZE][/COLOR][/FONT]
The Pros and Cons of "alternative" assembler syntaxContinuing from [URL]http://www.worldofspectrum.org/forums/showpost.php?p=720754&postcount=72[/URL] [QUOTE=u6c87;720754]But that wouldn't change if…
... code compiles (with some pointer size/arithmetic warnings) using sdcc 3 ... not perfect (look at accessing stack variables which are structs - yuck ... code, and worry about code size, efficiency and which compiler later ...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... or DEHL depending on parameter size.
... /> ; ix = char *
; stack = char *string
; ... generate digits onto stack in reverse order
... push af ; digits onto stack
ld ...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... need careful attention during the stack cleanup on return to ... or DEHL depending on parameter size.
[/QUOTE]
... (and possibly corresponding pop at stack cleanup time, depending on how ... the callee cleaning up the stack which makes me slightly ...Compiler conventions for passing args/return valuesI've been mulling over this for a while, but I can't spot it covered anywhere. There are various methods for passing args and return values between …
... that parameter from the stack on return. If it ... arg in HL and stack any remaining ones. This ... saying, you avoid the stack imbalance possibility here anyway, ... other things on the stack which are needed sooner.< ... speed (and probably code size). I'm going off ...128 BASIC-compatible way of loading BASIC as code?On a 48K Speccy (or from 48 BASIC or USR 0 mode on a 128K machine), one can do a silly trick like this: [code];; load a 4000 byte BASIC program ld i…
... but minimises the file size by shifting down RAMTOP ... also saves the machine stack including the error return ... br /> ld sp,hl ;reset stack
ld ... br /> MCCONT: push hl ;stack ROM return address
...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... take scan_loop return address off stack
ld a, (t_addr ... call expt_exp ; parameter to calculator stack
call syntax_z ; ... call expt_1num ; number to calculator stack
call check_end ; ... , (ix - 5) ; get size of
ld l, (ix ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... /> push hl ; stack element count
call de_plus_1_to_de ; dimension size to DE ... de_plus_1_to_de ; last dimension size
ex (sp), hl ; stack variable pointer, counter ...
