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Keyboard scanning routines / techniques?What keyboard scanning routines or techniques do people use? I'm looking to write something which doesn't rely on the ROM-based keyboard scanner, an…
... the scan function in interrupt routine 50 times per second. I ... to write some code to test it properly.
The ... -
128k Basic used much ?Hi - I was wondering if there were many,if any, games programmed in 128k basic? I was also thinking of doing one myself as I wish to make a text heav…
... :" syntax). (+3DOS has a DOS_VERSION routine, but as it's not ... used in a simple generic test.)
[code]
bit 4 ... -
How to test Z80 Code?Hi All, Is there a way to test a block of z80 code (nothing speccy specific in it) with many different inputs? The reason I ask is that I'm writing…
... ]Is there a way to test a block of z80 code ... , load your code and the test case data into the emulated ... data and the like before calling the function under test. -
Trailblazer - mapped?Anyone mapped Trailblazer yet? I'd kind of like to get hold of the maps. D.
... (the end of the print routine starting at $8897) shows the ... /> C $6750 220 Terry's Test
D $682D 279 Pete ... -
Trailblazer - mapped?Anyone mapped Trailblazer yet? I'd kind of like to get hold of the maps. D.
... zone is called Terry's Test.
There's also ... of dump loop, call DUMPS routine, pattern IDs >=$AE not ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... later models, a small detection routine to be executed at start ... .[/QUOTE]
Does reusing/calling ROM procedures in general constitute ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... Speccies perhaps?..
Does reusing/calling ROM procedures in general constitute ... that I never used ROM routine; I did and I continue ... compared to using a ROM routine in general. Any major update ... -
Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…
Ewww. Calling the ROM routine to plot a pixel? WTFingF?< ... -
Struggling with this routine... Any ideas?I'm trying to write a routine that plots 3 pixels to decrease the energy bar in the top right corner by 5 units, but it just wont have it! There mus…
... going to change.
[*]Your routine uses Y=171,172,173 ... ]blue[/color] is the actual routine; the enclosing code is just ...
ret
[/code]
Test with:
[code]PRINT AT ... -
Rotronics Wafadrive v.1.80 ROM - Corrupt or purposely broken?I've been digging around the Wafadrive v1.80 ROM (from [URL="http://zxspectrum.it.omegahg.com/_RO.htm"]here[/URL]) and can't decide if the ROM is cor…
... mistake on my part - the routine is quite correct, and is ... through to $35, so the routine is pointed back at $0cf7 ... .
Simple test - call the BEEP routine with a hook code ... -
generating a pre-defined list in an un-defined sequenceI've decided to become a drunkard, to which end I've been drinking a whole bottle of beer in one day (whereas normally I'd make it last 2 or 3 days).…
... restore was that I was calling GetAttrib every 64 picture bits ... call to Magenta wasn't calling GetAttrib for some reason, so ... calls to JR's RND routine, from which I'm taking ... -
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... contention will make the same routine also work on a Spectrum ... will need some time to test everything properly... -
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
... contention will make the same routine also work on a Spectrum ... will need some time to test everything properly...[/QUOTE]
20-column multicolour: a half-baked ideaI was writing an email reply to one Mr Jowett about multicolour routines, and in that way that explaining something to someone else makes you think "…
I uploaded the test program [URL="http://www.mediafire. ... simple change, so the same routine could work on all contention ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
...
pop bc ; abandon this routine call
jr .exit ; bail ... /12Ol8Ol"]I've put my test TZX files (containing screens) on ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... br /> pop bc ; abandon this routine call
jr .exit ; ... />
[CODE] ;; set this test program to load a screen ... /> jp z,0x1b7b ; ROM routine indicating BREAK (code L)
Math problemI'm trying to solve/model a science problem, and I thought a simple BASIC program might help me, but I struggle to write it. Goal: Given a length of…
... reduce n to 0) and test again. If the two items ... /> Thanks for explaining the bubblesort routine. That will help a lot...Spec dev in the eighties and ninetiesWhat different ways were there of making speccy games? There is the 'worst' way which is typing in hex commands in Basic unreadable, easy to make m…
... every time you wanted to test a new bit of code ... Speccy's built-in load routine to import the data. Although ...Mirroring UDG'sJust wondered is there a quick an easy way of mirroring UDGs (byte values)? i.e. BIN 11110000 becoming 00001111 etc.
... I have a working routine, though need to test properly. Its 61 ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... write some little routines to test how dec operates on the ... call the PRINT USR 61440 routine any junk is cleared. unessary ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ;; straight through, the sampling routine requires
;; 119T, plus ... ld a,(.read_edge_test); place test instruction in accumulator, 13T ... br /> xor 8 ; invert test (7T)
ld (.read_edge_test ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... to use the saving routine since the standard speed ... load-screen-SL3-test.zip"]a quick test[/URL], made at ... br />
The loading routine starts by default at address ... /zx/load-screen-SL3-test-speed-6.zip"]Here ... is another test file[/URL]; it also ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... fast interrupt response. An interrupt routine could 'save' the main program ... time is in the interrupt routine (when time to save registers ... 2 for 'WRITE BYTES') before calling the device driver through IX ...The complete Knight Tyme (48k) RAM disassemblyHello! Just a quick note to let everyone know that the initial version of my [URL="http://www.dur.ac.uk/philip.anderson/disassemblies/knight-tyme-48…
... sprite routine I would change the bit shift instructions before calling it ...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 …
... ]You can't change the calling convention without informing the compiler ... them yet) store more, but test only what is required:
test.
3) rr l (and ... ]Anyway here are the z88dk calling conventions:
Fastcall:
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 …
... : bit 0, (ix-n) to test.
3) rr l (and ... of "ORing" the result to test for zero on an integer ... is still the difficulty of calling through functions pointers so every ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... ://www.dropbox.com/s/zvijykah7qbnnzw/test.tzx"]TZX[/URL] (Penetrator in ... interesting to write a load routine for. Instead of measuring high ...Z80 Assembler for Win7 PC (64-bit)Does anybody know where I can get a decent Z80 assembler that will work on my 64-bit Win7 PC? I tried the first one in the WoS utilities and it would…
... statements into your assembly to test stuff! [push registers before popping ... , or just working on a routine and not wanting to faff ... suspect that using it to test routines even for the pro ...Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... was the first (partial) successfull routine with a jump opp.
Just one more test...
[code]
3E02 ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... loading again using the ROM routine works X % of the time ... a few different people to test your final version on their ...
