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Double-Buffer ScreenFor my Alien Breed Speccy re-write I decided to use a Double Buffer (DB) or 'Back Screen' to draw all the game action onto, before shuffling the whol…
... then RANDOMIZE USR 31144 (or JP or CALL, or whatever) and ... -
Unusual custom turbo loaders - with sourcesI have always been fascinated by turbo loaders; my games all feature a TZX version with one of such schemes implemented, and I have been experimentin…
...
LD B,208
JP NC,65459
LD A ...
LD B, 208
JP NC, 65459
LD A ... -
SkoolKit 4.0SkoolKit 4.0 has been released. SkoolKit is a set of command line utilities for disassembling Spectrum software, into ASM format or into a bunch of …
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…
... like this:
0x0028 JP 0x335B
0x002B RST 0x38 ... this.
0x0028 JP 0xFFFD
0x002B RST 0x38 ... ,#0xFFFF ; DE=0xffff
0x0005 JP 0x11CB
...
0x11CB ... end jump to the original jp location.
--- INTERFACE ...Help with Manic Miner tweaksPlease. :) This is the Software Projects version, simply as I had it to hand. [B]Problem 1:[/B] I've learned a bit (actually quite a bit) and manag…
... /> POP HL ; 36838 225
JP L_9033 ; 36839 195 51 144 ...analysing program variable usageIf I wanted to count the number of times each variable is referenced while a program is running (not the number of times each variable is referenced …
... HL,[true (VARS)], CALL (not JP) $2900 V_EACH. If it still ...Pause XWhat would be the best way to implement a short delay (unlike with basic, without any key detection to cut it short) in assembly ? Basically somethi…
... the loader call and the JP to execute the code, just ...ANN: Tipshop updated Tuesday, 30 September 2014Tuesday 30 September 2014 2 updates within a couple of weeks of each other - you're spoiled. Or something * JP provided a correction for a cheat fo…
... spoiled. Or something
* JP provided a correction for a ...ANN: Tipshop updated Saturday, 29 November 2014Saturday 29 November 2014 2 updates in a month - woohoo! * Andy Ryals sent in POKEs for Archeomania , Dark Tricks, Donkey Kong Reloaded Again, Find…
... /> * Zup reported a bug and Jp provided the fix for Rocky ...SkoolKit 4.2SkoolKit 4.2 has been released. SkoolKit is a set of command line utilities for disassembling Spectrum software, into ASM format or into a bunch of …
Strange keyboard port reads on 48+Hi all, I don't know whether it was already discussed (I also searched forum, but there are too much of results searching "48k keyboard" so I didn't…
ANN: Tipshop updated Thursday, 26 February 2015Thursday 26 February 2015 Happy New Year! Happy Valentines! Happy .. Oh, forget it (Yes, you're just a tad late. Ed) * Philip M. Anderson sent in P…
... POKEs for Impossaball.
* JP provided POKEs for Subway Vigilante ...Playing AY music on the SpeccyCan anyone help with playing AY ripped music on the Speccy? So, let's say I want to play some ripped AY music, such as: [url]ftp://ftp.worldofspect…
SkoolKit 4.4<div><font face="Arial, Verdana"><span style="font-size: 13.3333330154419px; line-height: normal;">Hey, first SkoolKit release announcement since the…
Spectrum Games from Japan, some high quality titlesHey guys, I have to sell off some of my Spectrum games and other pieces. Everything is located in Japan, but shipping is not as bad as you might thin…
... is here: http://pcbiroiro.blogspot.jp/ If you really want you ...ZX-Assembler version 0.8 (beta) releasedDear readers, yesterday I've published ZX-Assembler in its first version 0.8. It offers you some interesting features, even if I know there are …
... , including DJNZ --> DEC B: JP ...
* A big summary ...Could use some help improving some controls.Back when Dingo was released many people said they had problems controlling it, so I've decided to improve the controls on it, so you no longer need …
Code structureHi all, I'd be interested in opinions on the neatest way to do this. I've got a print string routine in which 0-31 are reserved for control codes, …
... , >31 printable ASCII
jp c,control_code
...print char ...
...jumps to routine in jp table based on contents of ... /> But each routine ends with JP PRINT_STRING so the next byte ... lots of routines end in JP rather than RET.
How to Write ZX Spectrum Games - Jonathan CauldwellHello, I'm trying to improve my very basic level of assembler by reading the Jonathan Cauldwell guide. I'm fine with the basics LD, CP, and JP,…
... the basics LD, CP, and JP, but I'm quite new ... -string
call 8252
jp loop
string defb ...ANN: Tipshop updated Friday, 30 October 2015Friday 30 October 2015 Lots of new POKEs, tips for a SAM game and a rather belated compilation of RZX Archive updates * Andy Ford provided new P…
... POKEs for Lirus!.
* JP provided POKEs for Day In ...Z80-Code Flow-Chart Analysing ToolHi all, when working on my current Speccy Project with Pasmo, i imagined, it would be nice to have a tool for analysis of produced Z80-Code on t…
... nesting of
CALLS and JP/JR's, maybe restricted to ...Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …
... ,d
or e
jp nz, _loop
ret
or e
jp nz, _loop
ret[/code ...
