-
[SpecOS] Question about OVEROk folks, this one has me (and a few friends) stumped. How would you implement OVER in SpecOS? Bear in mind that I'm after an algorithm which I appl…
The main reason to use OVER was to provide XOR-like drawing effects, so that you could DRAW a pattern and then DRAW it again to remove it seemlessly. Given that, XORing the two INKs would seem the obvious way to go. -
[SpecOS] Question about OVEROk folks, this one has me (and a few friends) stumped. How would you implement OVER in SpecOS? Bear in mind that I'm after an algorithm which I appl…
... use OVER was to provide XOR-like drawing effects, so that ... , you get
7 XOR 0 = 7
So ... -
[SpecOS] Question about OVEROk folks, this one has me (and a few friends) stumped. How would you implement OVER in SpecOS? Bear in mind that I'm after an algorithm which I appl…
... , you get
7 XOR 0 = 7
So ... the BBC where you can XOR the current pixel with the ... ,0:DRAW 255,191:REM XOR over the line with ink ... -
[SpecOS] Question about OVEROk folks, this one has me (and a few friends) stumped. How would you implement OVER in SpecOS? Bear in mind that I'm after an algorithm which I appl…
Yep, same result you get if you draw on the CPC in pen 0 with XOR mode active. In reality this tends not to be an issue since you naturally tend to find yourself using 0 for the 'background' colour and drawing on top with other pens. -
Pope coming to BritainThe Pope is coming to Britain tomorrow. Anyone care?
... ) Jesus had to die to erase our sins, whereas the Pope ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... instruction type (LD, OR, AND, XOR, INC, DEC, JP, CP etc ... -
SAM programmingHi Can anyone provide any example hello world or graphics/sprite printing style machine code routines for the SAM? I can't seem to find anything rem…
... attribute byte
no_key: xor a
in a,(254 ... -
Looking for cursor routineIt's been a long time since I programmed a little bit in Basic, so I decided to create a simple cursor routine: [url]http://db.tt/SPnSdpx[/url] I k…
... better than the more traditional XOR approach.
Anyway - it ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... force the programmer to use XOR -1. Get rid of INC ... STA ADD SUB AND ORA XOR CMP
and still eight ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... STA ADD SUB AND ORA XOR CMP BCC BCS BNE BEQ ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... STA ADD SUB AND ORA XOR CMP BCC BCS BNE BEQ ... -
Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…
... not dangerous for testing. Flasher erase only end of 512kB rom ... -
Flash based rom replacement board for +2A/+3I'm sure I already started a thread about this, but I can't find it... Anyway, this post's to say that I've just sent off the order for the printed …
... always be able to accept erase commands etc, even when the ... -
DMA interface for ZX Spectrum[url]http://velesoft.speccy.cz/data-gear.htm[/url] This is internal DATA-GEAR interface for any 8-bit computer with Z80CPU. Use Direct Memory Access…
... would also have to draw/erase sprites on it's own ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
...
and and
exor xor (just to keep to 3 ... mnemonics)
not recommended use XOR -1
load lda/sta ... -
zx spectrum +2 troubleshootingHi There I am new here and I need some advise as to where to look for issues on my zx spectrum +2 it was working fine this morning .. then while pl…
... EPROM chips and tools to erase/write data in them? (or ... -
Beepola v1.01A new version of Beepoa, v1.01, is now available for download from:- [URL]http://freestuff.grok.co.uk/beepola/Beepola_v1.01.00.zip[/URL] (650KiB) …
... two generators mixed together through XOR, which allows to get different ... -
Opinion on new 128K only gamesHello, Being new to the WOS community, I am unclear on the attitude towards 128K only software, that is; Is there a strong need to support the 48K m…
... />
mov ebp,edi
xor edx,edx
mov ... ,ah ; Insert green
xor bl,255 ; INVERSE alpha
.zero:
xor a,a
ld [flash ... ]
and a,pad_a
xor a,pad_a
ld [collision_on ... -
Zero (aka Ziggy) 0.4.5The 0.4.5 preview build is available for er... preview. There are still some bugs and glitches to iron out but I have taken various suggestions on bo…
... represent header/data and an XOR checksum of the RAM data ... -
Zero (aka Ziggy) 0.4.5The 0.4.5 preview build is available for er... preview. There are still some bugs and glitches to iron out but I have taken various suggestions on bo…
... , size 19 bytes, leader 0, XOR checksum matches: Show as header ... X+2 bytes, leader 255, XOR checksum matches: Show "DATA SIZE ... -
Zero (aka Ziggy) 0.4.5The 0.4.5 preview build is available for er... preview. There are still some bugs and glitches to iron out but I have taken various suggestions on bo…
... , size 19 bytes, leader 0, XOR checksum matches: Show as header ... I've not used the XOR checksum check.
EDIT ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... ,al
; ------------
xor ecx,ecx
mov bl ... BYTE to UART
xor bl,255
inc ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... ,al
; ------------
xor ecx,ecx
mov bl ... BYTE to UART
xor bl,255
inc ... -
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
... /> xor a,l ; XOR BYTE with CRC then XOR HL,0ABCDh
xor a ...
ld a,h
xor a,0ABh
ld h ... -
Print text in assemblyHello, a perhaps simple question: I would like to print a text string on the screen and I wonder how to do that in the most easy way? I seem to re…
Spectrum 128K RS232 to PC serial cableIf you have read some of my recent posts then you will know that I am eager to link my Spectrum +3 to a PC. This will be done by wiring a standard PC…
Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... /> main ld hl, 18341
xor a
kontroll7 dec h ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... (which is better written as XOR A, BTW), not after it ...Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... (which is better written as XOR A, BTW), not after it ... A to 0, could be XOR A to save space
Optimization for this codeHello, I have done and submitted a small program for the CSS Crap Game Compo which involves a machine code routine. The z80 with BASIC and MC is av…
... to (HL).
BTW, XOR A saves both space and ...
