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Speeding up PRINT code in ROMHi Folks, I seem to recall that someone stated the PRINT command is rather slow because it has to handle screen and printer printing - is this cor…
... wrote a streamlined print routine a while ago for ... ]
DISPLAY: equ 0x4000 ; Start of display buffer
ATTRIB ... : equ 0x5800 ; Start of attribute buffer
CHARS ... /> org 0xfe00 ; 65024d
TEST:
ld de, 0x150a ; AT ... -
Disassembly starting from a tape fileFollowing on from the Atic Atak redefining keys thread, I was wondering how you'd go about disassembling the code from scratch. The approach used in …
... It's easier to test and learn things when ... can say that games at start often do some initialisation, ... used to initialise it at start in the game
... another place at game start or not. I often ... debugger just after loading routine and then watched my ... -
Is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of fileHi, is there a way to suppress error R Tape Loading Error in Basic when trying to load only part of file. E.g.: I have a Tape-Code-File Start f…
... stack=65501
4 LET start=?????: LET length=?????:
FOR ... NEXT a: DATA 2221,length,start,11563: REM stack contents
LOAD ""CODE start,length
12 RANDOMIZE stack ... bytes to load from start of CODE data block ( -
1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
... with first byte of routine.
;end of ... /> ld bc,0ffc0h ;start address of board
... :
cp 00h ;test for line switch.
... -
1k Chess (was the 924 bytes thing!)Hi, I've decided to do a major rewrite of large parts of the code for the isometric Chess thing that I've been messing with. It got to the point, …
... with first byte of routine.
;end of ... /> ld bc,00c0h ;start address of board
... :
cp 00h ;test for line switch.
... -
Printing text, part MMXIIXI'm pretty sure there's been a zillion threads about this already, and I don't think it's the first one by myself either, but here goes. Proportiona…
... a frame for the same test string. And there's still ... 've just randomly decided to start over - and worse than the ... . In other words, your second routine is not just an optimized ... -
New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... and includes the patched ROM routine):
1) Loader ... t work.
My test 128k Z80 snapshots were Daley ... it avoids some of the start up checks or memory processing ... add
your own loader routine later
-h: make the ... -
Dispair at the pace of life > 40 years.Its been a funny kind of winter this year. The fall from August to December went so fast for me that it seemed like a blink. Christmas comes and ever…
... 'm told again, I like routine. She places something in to ... /> IT'S A POSITIVE PREGNANCY TEST!!
My first reaction ... " or "I'm going to start trying more ales and actually ... -
Zynaps scrolling - anyone ever reverse enginnered this?Zynaps has IMO some impressive scrolling - it utilises 18 character rows of the display file, so quite a large active play area, and scrolls 2 pixels…
... -opening ideas and solutions from start to end. I learned [i ... limit, it runs a delay routine according to this counter to ... [/i] way it uses to test for collisions :)) But that's ... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... printloop.symbol
TEST:
org 30000 ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... /> attr equ 22528 ; start screen attribute field
lastk ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... start
removed the space before LF
[code]
TEST ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... string before calling this routine
fetchan ld ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... s programmed to.
[code]TEST:
org ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... br /> attr equ 22528 ; start screen attribute field
lastk ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... />
[code]
TEST:
org 30000 ; ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... /> attr equ 22528 ; start screen attribute field
lastk ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... />
[code]
TEST:
org 30000 ; ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... /> attr equ 22528 ; start screen attribute field
lastk ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
[code]
TEST:
UDGSTART EQU #5C7B ... equ 0x1601 ; ROM openchannel routine
ld hl,str2 ... br /> attr equ 22528 ; start screen attribute field
lastk ... NEXT SPACE
; CHECK routine TONI BAKER ,
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... (especially the macros at the start) has not been run ever ... ; puts 4 NOP instructions at start of code to help the ... a = 0, use standard aligned routine
or a
jp ... />
There's a few test switches you can play about ... -
AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
... or turn off looping, start playing an instrument from an ... the interupt driving the music routine as all effects that are ... 8000 basically repeats from the start, other values are useful for ... one set.
Start 2byte - refrence used for keeping ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... code.
The line routine that I have implemented is ... there have a fast line routine, plese email me.
