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Smooth Screen Scrolling RoutineHi everyone, this is a follow up to the thread on smooth screen scrolling. As promised here is the code for the routine. It's pretty long and fairl…
... * The background data is arranged in rows of 128 tiles starting ... /> LD (BLFLAG),A ;Flag used to indicate
;if previous ...
* Do first tile in row
MODHLA LD ... is
;ORd with the last byte of the
;tile ... -
What games ave u played in last 7days?OK ok, I've been looking at the best games postings and well ok. Many say Manic Miner is the best blah blah (dont get me wrong....it is a classic) bu…
... ) but I havent played it in the last week. Games I've ... -
Best in-game music?Any platform, which is why this thread is here and not in Games. :) Nominate as few or as many as you like, in order or not. :) Mine (in this order…
... thread is here and not in Games. :)
... as many as you like, in order or not. :)
Mine (in this order) are:
used for MAP30 (Last Call) of [I] ... being associated with them (in the last case, I've given ... -
Help reqd to fix some damaged .tzx filesDue to an oversight setting up Taper a few years ago, numerous .tzx files had some of their pauses reset to 0. I've gradually been fixing these as an…
... Machine - 48k.tzx
Indiana Jones And The Last Crusade.tzx
Lerm ... Tape Utility B.tzx
Lord ... /> Super Wonderboy In Monsterland.tzx
Swiv.tzx
Table Sums.tzx
Teenage ... -
WANTED: tape noiseAs [url="http://www.worldofspectrum.org/forums/viewtopic.php?topic=7709&forum=3"]previously noted[/url], I'm developing (on and off) a new TZX encode…
... /games/h/HobbitThe(SinclairResearchLtd).tzx.zip"]The Hobbit[/url]: ... pub/sinclair/games/s/SplitPersonalities.tzx.zip"]Split Personalities[/url]: ... ).tzx.zip"]Cauldron[/url]: a block with a partial last byte< ... be helpful, so please get in touch (pak21 (at) srcf ... -
Request: searching +3 titles in not-disk formatSee subject: i like to know all Spectrum +3 titles in the archive not released as disks, but as tapes (TAP, TZX or snapshots). I just can search in l…
... in the archive not released as disks, but as tapes (TAP, TZX ... or snapshots).
I just can search in last SPA2 update ... , but because they report "+3" in the ... list and the format in the same time ... -
decoding speech in Creature of HavocI've been looking at the Fighting Fantasy gamebook "Creature of Havoc" for the first time, since it was mentioned yesterday in another place, and hav…
... since it was mentioned yesterday in another place, and have ... in the alphabet.
* Spaces are replaced by the last vowel used ... .
* Spaces in encoded speech are ... a problem of ambiguity in distinguishing between the letters ... -
48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…
... the base spent the last 3 years at least ... a 1 bit hole in every byte and bring the ... that the 4th bit in the byte was the problem. ... or 00001001, two bits missing per byte, so my guesses where ... always affecting the chip installed in that socket.
Hacking the O.C.P Full Screen Editor/AssemblerIf you have been reading my posts recently then you will know that I am eager to have the sourcecode I wrote for the Spectrum during the period 1988 …
... going to document the process used to restore this sourcecode as ... Screen Editor/Assembler was published in 1983 and written by ... development PC hard-drive in .DSK format. In total, I have saved ... at address 089F0h. The very last BYTE of the program is probably ...A clever method of using a single 8-bit register to be used for two things at a timeI don't know if this is the way the SAVE routine in the Spectrum works. Anyway, this is what I've learned today. I've been commented the disassembly…
... shifts each bit in a byte so it can ... byte that is being outputted to MIC, and the counter of bits ... long as there are bits left to transfer, the ... If ZF is set, the byte has already been trasferred. If ... ;Other stuff... load next byte and so on...
...Tap, TZX to Wav in JavaHi folkes, I'm interested in converting Tap, TZX and possible SNA files to WAV in Java. Is there any freely available source code for such an operat…
Hi folkes,
I'm interested in converting Tap, TZX and possible SNA files to WAV in Java. Is there any freely available source code for such an operation, or if not can someone give me a pointer on how to get started developing this myself.Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …
... upper RAM or the logic used to access it.
... whether the subtraction resulted in zero (it should have ... , the loop terminates. In both cases when the loop ... On the left is the last byte of lower RAM (32767) ... etc. were then established in upper RAM, but the ...Byte-order backbufferThis is a tool for Z80 coders who wish the Spectrum screen had a serial layout. It runs as an interrupt mode 2 service routine and uses POP and PUSH …
... You can use this code in your own programs as long ... + 768 - 16 - (attr * 16)
; last byte of the back_buffer - 16
in order bitmap
; (note ... except rainbow processing, and in that instance LD/PUSH is ...about Three Weeks In Paradise 48k versionHi All, I want we to talk for Three Weeks In Paradise 48k version :) Mikie make very precise tzx who is in WOS archive, but Side A and Side B of thi…
... Mikie make very precise tzx who is in WOS archive, but
in WOS archive must present side a tzx and side ... b tzx ?
... not know for what is last 2 dummy bytes but ... may be need to make tzx and from side b ?:)< ...BIFROST* Advanced Programming - part 4In previous posts I demonstrated how to move multicolor tiles up and down smoothly by a single pixel, and sideways by an entire char (8 pixels). Thi…
... PLOT command. In this case, the 5 highest bits in HRC will ... ) and the 3 lowest bits in HRC will indicate the offset ... extern unsigned char lastK(23560); // last pressed key
... technique presented here could be used in practice, to create a ...LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
... ; check if any bits in the high nibble are ... /> ld c,a ; store in byte counter
xor 19 ; ... The .getlength_2 entry point is used if the accumulator
;; ... , even when LZ4 is used in "high compression" mode. ...A doubt about IN and OUTIN (and OUT) can use bc to define a 16 bit port to be read or write, when used as in r,(c) or out (c),r. Also, if you use in a,(n) or out (n),a yo…
IN (and OUT) can use bc ... be read or write, when used as in r,(c) or out ... />
Also, if you use in a,(n) or out (n ... that immediate as the low byte of the port to be ... ... what value is used as the high byte of the port? It ...Fuse 1.2.1 releaseA new release of Fuse, the Free Unix Spectrum Emulator, is now available at the SourceForge project: [url="https://sourceforge.net/projects/fuse-e…
... [list]
[*] Add Z80 registers, last byte written to the ULA, tstates ... detect loaders feature is being used.
[/list]
in particular thanks to Philip Kendall ... platforms should become available in the next few days.SpecBAS 0.900 ReleasedAgainst my better judgement, here's 0.900. It's got lots and lots new, but mostly the new shiny is the editor. You can indent your code, you can e…
... operators (+=, -=, *=, /= etc) can be used in expressions - LET b=a+=1 ... of) m lower-order bits in n
INPUT ERROR ...
Fixed crash when deleting last line.
Fixed crash ... caused parameter errors when used in complex expressions
...ZXSCLZF - Yet another Screen CompressorQuick disclaimer before I continue, this compressor does not shrink screens as small as some of the others posted here, in particular the very good z…
... /> // literal byte
int _XEND,_XSIZE; // global as used in function
typedef union {
unsigned short int rr; //byte ... ]>=24) { // high byte >=24 or in attr space >=6144bytes ...Random-Access to Microdrive FileI am working on a BASIC program to backup a microdrive text-file to standard tape array-file. To backup a text-file from one microdrive to a secon…
... four array-files 32K Byte each.
In my case, the ... , this text file "!Blocks" is used within my FORTH interpreter, but ... byte in OPEN# Channel-area and forcing the re-PRINT# of the last byte ... the address of the 512 byte buffer
There ...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…
... />
; destination byte can fit 8 bits
ld c,#0x08 ... ; does this glyph fit completely in byte?
sub a, c
; Decrement pixels that fit in target
dec c
; Put last byte on screen
ld (hl ...Are line numbers considered the first statement in the line?I'm trying to understand how BASIC variables are stored in memory using the BASIC Programming manual and am puzzled by the results of the control var…
... how BASIC variables are stored in memory using the BASIC Programming ... a FOR ... NEXT loop. The last byte is the statement number within ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... /> ld a, (hl) ; first byte of value in table
inc l ...
ret
; erase last char written to screen
ld a, (hl) ; first byte of value in table
inc l ...
; count number of set bits in E
ld b, e ...Convert TAP to TZXSubject says it all really! I've got this tap2tzx, but it's blatantly for UNIX use (C programs and compiling, ugh!) Is there a Windows or DOS execu…
... Realspec handled saving .TZX's that contain custom ... Lerm" program into realspec, used the CSW to load ... TZX, where I fell over was the TZX's were either 1 byte ... or blank in ... if Realspec handles saving TZX files with custom blocks ...How do i learn to programAll the years i had a computer the only one i could program was the Texas Instruments Ti99/4a and when using extended basic with its so simple sprite…
... registers are either used on their own or in pairs.
used to store numbers from 0 ... single registers are a byte in size and hence store ... an effective binary number 16 bits in length. If you multiply ... onwards. If it was used on its own then ...Is there anything new to comeApart from doom. I personally don't think there has been anything all that innovative on the pc. Whereas the Speccy had handfuls of games in that c…
... up the graphics a bit in conversion
It' ... suffered the same thing in conversion to the pc, ... it's far slower loading bits in, there's about a 10 ... to a dramatic device commonly used in Greek Tragedy theatre - ... is saved at the last minute by some unexpected ...Chuckie Egg and joypads on the SpectrumAn old favourite of mine is "Chuckie Egg", but it has no joystick option. I've got a dual port DK Troniks interface, the first port takes IN 31(Kemps…
... problem used to be hacking into the code in ... pretty simple. An IN instruction on the appropriate ... accumulator. All the bits of this byte corresponded to whether ... ports in order to detect all the keys used ... keyboard detection with one IN instruction. Hence the ...TZX to TAPIs there an application for the mac which will convert TZX files to TAP? I've searched around but can't find any.
... be used - 8 pulses per byte, as opposed to just one in a ... /> Why embed another format inside TZX?
[/quote]
... two *synchronised* copies of the tzx around - one CSW form ... used...
And we're not embedding another format in the TZX ...Speedlock & Spin (again)Following on from the Vixen thread, I've come across another game which crashes during the decryption beeps - Imagine's "Ping Pong". With Vixen, a ne…
... thread.
Last night (late), I dumped ( ... ZX SPIN and Spectaculator (in fact almost everything seems ... t recall it working in Spectaculator either, so I ... you 5vs 4 bits ?
In addition, ZX SPIN ... end of the tape/TZX and then plays the ...
