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Memory questionsQuestion 1: PRINT PEEK 23732+256*PEEK 23733 returns 65535 for a 48K Spectrum and 32767 for a 16K Spectrum. PRINT PEEK 16388+256*PEEK 16389 return…
... />
I'll try the routine (with NO$ZX81 set to ... 'm not sure I can test the 3K version, though - I ... -
Memory questionsQuestion 1: PRINT PEEK 23732+256*PEEK 23733 returns 65535 for a 48K Spectrum and 32767 for a 16K Spectrum. PRINT PEEK 16388+256*PEEK 16389 return…
... "]
I'll try the routine (with NO$ZX81 set to ... 'm not sure I can test the 3K version, though - I ... -
ZXBaremulator 35th anniversary editionHi, to celebrate the 35th Spectrum anniversary, I've released the first complete Spectrum 48K bare-metal emulator for Raspberry PI. It's available…
... to do a more complete test.
My first impression is ... speed?
Standard Spectrum loading routine with original sound output is ... -
ZX-Paintbrush and global palette and ula+ supportHello, I think I need some help for the palette issue of ZX-Paintbrush. I want to check whether the way I'm about to clear the palette handling i…
... looking good from a quick test!
The problem I ... is truncated by the API routine creating the dialog.
I ... -
128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... ROMs are fitted. You should test the features of hardware you ... banks, I write a paging routine with @impomatic which identifies the ... the ROM's interrupt service routine to test the contention, a more ... with a small custom IM2 routine, or just see if it ... -
128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... example code:
[code];
; test if this computer has the ... screen prior to running the test).
Usually, I ... always flip using the following routine:
[code] ALIGN 256< ... the results of the contention test outlined above, I can ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... drives should be a pretty routine job .
And I ... there is always the Multiface test to do on the edge ... -
Finished with my dice rolling programTook me all day but I'm rather proud of it, simple though it is. Its up at Dropbox if anyones interested https://www.dropbox.com/s/qdgtfc0zyy94hxm…
I couldn´t test your routine (because of the format).
< ... can be done from this routine, and the locations of both ... -
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…
I wrote a streamlined print routine a while ago for a ... />
org 0xfe00 ; 65024d
TEST:
ld de, 0x150a ; AT ... -
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…
... you look at the ROM routine it replaces (e.g. ... /> I quickly wrote a naive test:
[code]10 ... be handled better. The routine I listed is okay for ... to in the display buffer (routine CL-ADDR at 0x0e9b, called ... suggest improvements to my routine. -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... on all machines, and my routine still breaks down (at least ... /> It’s not easy to test this without direct access to ... -
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 …
... snapshot. It's easier to test and learn things when working ... in debugger just after loading routine and then watched my chosen ... -
Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... wee program is used to test the routine i.e. if it ... -
Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... 32 to HL again! Complete routine looks like:
; ------------------------------------------------------------------------------[/code]
BASIC test program:
[code ... -
Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... br /> ; ------------------------------------------------------------------------------[/code]
Test program
[ ... code]100 REM Setup Test Screen
110 GO SUB ... br />
The new routine is 49 bytes and takes ... -
Need help from people with a +2A/+3Started a topic [url="https://www.worldofspectrum.org/forums/discussion/55141/need-help-from-people-with-a-2a-3"]here[/url] to get a broader reach, b…
... sync padding instructions in my test loop at your latest version ... byte twice in a row” routine. Now, if only I could ... -
Thought this would be simple... Z80Hi Folks, Started to read "Beyond simple BASIC, Delving Deeper into your ZX Spectrum" by Dilwyn Jones. This is a great book and I came across the…
... my code. :-). I will test your routine on its own tomorrow and ... -
A Neat Redefine Keys RoutinePreviously, I’ve only shared this routine with a couple of people via PM, but I’ve now decided to make it public. I optimized it for size, so it uses…
... ;copy the key code to test into C for later
ret ;and we can test it with NC conditional
routine. That would speed things up ... tad in the main polling routine, but will add a great ... -
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…
I got this working, although the method is rather different from that originally envisaged. In summary, it uses an alternative machine stack to use bits of the ROM without having to write any new m/code.
[code]
3 CLEAR 65500: LET stack= ... -
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 ... jump_line:
cp 00h ;test for line switch.
... /> jr nz,next_right ;test if we've hit ... -
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 ... br /> cp 00h ;test for line switch.
... add a,0f0h ;test for White
... -
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 ... . In other words, your second routine is not just an optimized ... -
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…
... code etc. changes.
The test string is that "brown fox ... usable, especially considering that the routine I originally started from took ... -
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…
[quote="Sol_HSA;948269"]
The test string is that "brown fox"[/ ... the same timeframe. Plus, the routine checks for a few control ... ).
Here’s my test (I tried to match your ...
