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IND/INDR/INI/INIR/OUTD/OTDR/OUTI/OTIRI'm looking for confirmation that the official Z80 User Guide from Zilog is wrong and that these composite instructions actually change the value of …
... a 16-bit I/O address using one of these instructions ... -
What's wrong with this code ?OK, working my way through Jonathan Cauldwells 'How To' tome and I can't get the following to run in either spin or basin. ( iused the assembler in b…
... .
ld hl,blocks ; address of user-defined graphics data ... -
EMUZLOADER errorI've been sent some program files in EMUZLOADER format. One won't load as the unpacking doesn't stop when it reaches the top of the stack at $408F bu…
... , it expects the restored SP address to be at the end ... -
FREE Magazine tapesI have about 2 carrier bags full of demo tapes from magazines like Crash and Your Sinclair to give away. They must be collected from my address in L…
... must be collected from my address in Leominster in Herefordshire if ... -
Moving a line down the display in assembler?...It's not a "[I]how can I do it[/I]" question, it's more a "am I missing something in trying to do it a new way" kinda question. What I've been doing…
... do I get a screen address from that. It seems easy ... and you get the screen address in HL.
[CODE ... -
interface 2 game roms in SpectaculatorHow can I easily start an IF2 game ROM in Spectaculator? When I click on Open it asks about start address (16384 / 8192 do not work) and it does not …
... Open it asks about start address (16384 / 8192 do not work ... -
for all you moog fansfree for today, world music day.. free synth :) 21st June [url]http://www.arturia.com/evolution/en/products/minimoogv/minimoogv-original.html[/url]…
... pass on the public FTP address *BUT* you still have to ... -
Skype account hacked!Got an email from paypal telling me I'd just credited my Skype account by 25 quid, gets an another email moments later from Skype telling me they'd s…
... use on my yahoo email address and cracked it through brute ... -
+80 Word Manager - Oxford Computer PublishingHi folks, A query about the TZX image we have in the archive: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0012236[/url] The above entry is…
... includes a Free copy of Address Manager (standard, not +80) on ... -
Replacing Upper RAM in 48KHi Folks Well, my fun continues :) After sorting the display issues with this machine I found I couldn't load software meant for 48K machines. Havin…
... I need to tie unused address lines to ground or anything ... -
Dalek AttackThe listing for Dalek Attack should be altered as follows:- Admiral Software was not the author/developer, it was another name for publishers Altern…
Developing apps for ZX Spectrum with SDCCDue to troubles with makebin utility which always starts coversion at memory address 0x0000 and can only produce binaries < 32KB, it can't be used to…
... always starts coversion at memory address 0x0000 and can only produce ...+3e without the romsHi there, I recently purchased a Divide 57c and its awesome with my spectrum+ however I have recently purchased a +2A and would like to use the +3e r…
... garry lancaster at the email address on the +3e website to ...assembly optimization: times tenDecimal numbers are not computer friendly :) Anyway, short of saying "sod it - I'll multiply by 8" - and another part of the program does indeed div…
... by bit shifting....
Fastest way to do HL = HL ...ULA bug and snowI am tryng to improve the snow emulation in FBZX wii but I do not have a real spectrum to test the results. I used the information taken from Harele…
... 7 lower bit of the address of second screen byte the ... the fact that the row address of the second byte pair ... but the previous latched row address of the refresh remains.
Moar TR-DOS to tape conversions!I have posted three lame disk-to-tape conversions through snapshotting before, now (I guess) it's time to bring the rest of my complete collection he…
... contains a TZX file with fastest loading possible, a TZX file ...The need of having a 257-byte table for IM2 routinesThis came from a discussion at the speccy.org forum. I have understood that the reason behind the 257-table for IM 2 routines is due to certain joys…
... around with the interrupt routine address calculation.
People that ...Performance Analyser?Disclaimer: Im asking this question as a "non-programmer" so please forgive my ignorance if this turns out to be a daft question. During the life-sp…
... to potentially go back and address these bottlenecks so performance increased ...Work out attribute location in MCHow do I go about writing a MC routine which calculates the attribute address from a set of PRINT co-ordinates. I know you in basic you multiply the…
... routine which calculates the attribute address from a set of PRINT ... to 22528 to find the address.
Struggling to do ...redirecting Z80 sub-routine CALLsI'm working on changing a TR-DOS disk program to work from standard +128k tape and thought that rather than painstakingly working through the code ma…
... , and the destination page & address, from which info I could ...Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... pages out and jumps to address 0x0000 the Spectranet doesn't ... the first mounted filesystem into address 0x0000. The stage 3 boot ... got to get something into address 0x0000 so when the Spectranet ... />
1. Tieing the unused address line.
Pin 1 on ...40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... hl pointing at the screen address
ld de,scratchspace
address
ld de,overscratch
PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…
Some more PC questions1. Since we ended up discussing Linux in another thread, it made me wonder is Linux really, objectively faster than Windows? I mean, can you run, say…
... programmers I know to ask address the CPU at this level ...Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …
... /> C80
Edit: All address lines, data lines and resistors ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... 5V tolerant: for example, VRAM address lines A0-A6 are not ... inputs, and isolation resistors from address lines at the multiplexer outputs ... output is enough for the address inputs at the 4116 chips ...merging bytesPicturing three bytes with their bits identified by letters to make the visualisation easier, what's the best way to perform this transformation? [co…
... calling PIXEL_ADD to get the address of Byte 1 in HL ...Calling All Emulator Authors...Hi guys, This may sound like a crazy idea, but I wondered if it might be possible to incorporate Arcade Game Designer into an emulator in some way? …
... would return with the end address in HL or DE, which ... would be the start address for the next script - just ...
