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Low Sound output + Sound distorting pictureHi, I am having a problem with my Grey +2 at the moment while trying to use RGB output. When I load a game the loader tones are fine but the actual…
... have given up and gone back to RF Output!:)
Simon -
Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... the binaries from the snapshot back I think!
[/QUOTE]
byte s2 by declaring it as ... to add a terminating 0 byte
[/code]
or ... bytes including the terminating 0 byte in the array).
How do I clear only a specific area of a screen (quickly) in machine code ?I'm looking for a machine code routine which will clear the first 20 rows of the Spectrum's display (or any number of rows or columns) . I have found…
... .
; Alternatively could get HL back by PUSH/POP and then ...
[/code]
Cheers, SimonPreferred way of determining Y co-ord in assembly?I know of 2 ways of calculating the y-cord of a pixel row for the speccy in assembly. One is to calculate the address by ways of shifting and masking…
... skip
rr h ;Move back to the beginning of
sla a ;account for 2 byte per address
add a ... ;hl now holds the 8 byte aligned scrn address
pop ... each address representing a 8 byte aligned Y address. The rest ...Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... yielding 1 bit of the byte. So one bad chip will ... bit of a byte written to then read back gets read back incorrectly.GUIDE: How to convert TZXs to LOSSLESS low bitrate MP3s (56, 64 and 80 kbps)I posted this to comp.sys.sinclair last year, but it didn't get a single reply. Which annoyed me a bit. Since some people here seem to be intereste…
... you have some figures to back that up?
I ... 0.74Mb.
Cheers, SimonGUIDE: How to convert TZXs to LOSSLESS low bitrate MP3s (56, 64 and 80 kbps)I posted this to comp.sys.sinclair last year, but it didn't get a single reply. Which annoyed me a bit. Since some people here seem to be intereste…
... you have some figures to back that up?
I ... 0.74Mb.
Cheers, Simon[/QUOTE]
Point of ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... /> Thanks in advance,
Simon[/QUOTE]
Couldn't ... ula and the keyboard's back once you close the case ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... board and I send you back a working one of the ... .
Regards,
Simon & Father!Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... , res;
// have single byte 7643210 in bmp
// looking ... as wokani's where a back buffer bitmap is scrolled and ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... board and I send you back a working one of the ... :
Thanks,
SimonProject: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... to quickly get the result back.
This in itself should ... is to eliminate the 260+ byte buffer required by the scroll ... I foresee some sort of "(byte >> (7 - counter/2 ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... package I posted a while back. I will be adding the ... characters ending in a '0' byte). "strlen()" is a well-known ... address of the terminating '0' byte in the string.
byte. In other words, this subroutine ...Project: M.u.l.e.Wokani came up with a great idea about trying an open-development approach for spectrum games, and I thought why not try with a game I have under dev…
... (6 bytes in total, one byte for each uchar in the ... memory address of the first byte of "struct plot p" and ... "p" refers to a 6-byte "struct plot" in memory. "q ... land plots. We will come back to this a little later ...68000 programming.Anyone here know anything about this? My question is: how does the programmer know how long hisinstructions are? Do determine the operands to branch …
... pushing three zeroes, or putting back whatever was there before
byte, word, longs, or quads without ...Opus Discovery Testers NeededHi folks, I wondered if anyone on here had access to real Opus hardware ? I've made a few disk images of the disks I have with the great help of Sim…
... loads when dumped back to disk compared to Simon H's who ... to have a word with Simon Owen about your Opus read ...Opus Discovery Testers NeededHi folks, I wondered if anyone on here had access to real Opus hardware ? I've made a few disk images of the disks I have with the great help of Sim…
... loads when dumped back to disk compared to Simon H's ... have a word with Simon Owen about your Opus ...
Yup. I do use Simon's filter driver. It's ... I used VB6 and Simon used C and noone ... 's something remarkable.
Simon is a very professional programmer ...Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
[quote=zxbruno;207697]Back in the days ... , I used this code back in the day to have ... 130 PRINT AT 15,0;"Byte quantity:";cby
140 ... headerlessly a program or byte block to wherever I' ... br /> 201 RET ;Go back to BASIC[/code]Hope it ...Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... had never an error code back.
[quote=zxbruno;208042 ... and then PEEK it a-byte-at-a-time).
Using a multiface to exit to BasicBack in the days I was always fascinated with the idea of getting access to BASIC listings inside a program or game. I was able to work a way around …
... had never an error code back.[/QUOTE]
In the ... and then PEEK it a-byte-at-a-time).[/QUOTE]
Question on Z80 R/W cycles.Snipped from the complete spectrum ROM disassembly: [CODE] Now the memory is checked. 11DA RAM-CHECK LD H,D Transfer the value…
... the ALU writes the result back to memory. But if so ... faulty unless it is written back, then re-read again and ... may as well check every byte in the process.Any Project Stealth Fighter players here?Is the game as good as the YS review? Is it worth including in the documentary?
... one point scenery just jum back little. Also noticed that horizon ... my specy back in 1993 it was missing 0 byte string terminator ...childhood mythsthought id continue with todays theme. did anyone hear stories when they were a kid that were obviously bollocks. there were some woods near to a k…
... first then karl then simon and as dean was ... do but Simon quick as a flash jumped back down and ... astma was better. Technically simon saved his life as me ... allways had a respect for simon bravery. The building didnt ... on the roof while simon saved him he still ...A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... this: The lower address byte is always $FE and ... being used as a BYTE COUNT like LDIR and ... bit BC register as a byte count (number of repeats). ... , DE = Dest Address, BC = Byte count is specifically defined by ... jump the Program Counter back two bytes to run ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... Starts
14339 First display byte fetch
14340 First attribute ... output to screen, second display byte fetched from memory.
... 14342 Second attribute byte fetch, 3rd and 4th pixels ... wants it, and returns it back to the CPU 1 T ...Budget GamesWhch is your favourite Speccy budget game? *And I don't mean full price re-releases* There were some real class Speccy games that you could pick up …
Oneliner contestHello to you all, I dare you to make a program on 1 BASIC line. Here is the place to sent your ONELINERS [url]http://www.zxspectrum.00freehost.co…
... far. I need to go back to the drawing board again ... then it becomes a two-byte POKE (not good). This is ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... documentation as to where the byte fetches occur is fine (start ... I've moved the fetches back and forth a number of ... we all agree, the Wiki byte-fetch timings are real and ... CPU would then get access back and the ULA would continue ...Contention and floating bus timingHello, I was recently playing a bit with memory contention and floating bus stuff in ZXDS and there is one thing which puzzles me a bit. It is the d…
... together, including the last attribute byte being read from port #7FFF ... stabilise on reverting the buses back to CPU, and I've ... have got to put something back in I took out last ... worried about the bus hand-back to the CPU. But good ...
