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IN and OUT in hardware terms... what are 'ports'?Hi all, I understand PEEK and POKE, but have never managed to get my head around IN and OUT. The books all go on about how they read from and wri…
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The PEEK and POKE BASIC statements manipulate memory using the ... . The IN and OUT BASIC statements differ in that they ... one extra subtlety. The upper bits of the address select ... specifies the lower eight bits of the port address. The upper eight ... -
RCS (Reverse Computer Screen)[B]RCS[/B] ("Reverse Computer Screen", or simply SCR written backwards) is a small utility I'm about to release, that reorders bytes from the ZX-Spec…
... simple: if you run the BASIC programs I provided in my ... screen area still contains the upper "third" bitmaps, the next 2K ... following 2K still contains the lower "third" bitmaps. The attributes also ... -
NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... .
In the case of a ZX Spectrum (apart ... the data bus for [the lower RAM and ULA] and ... side data bus [CPU, ROM, upper RAM, expansion port]. If the ... is reading data from the lower RAM, a I/O ... to be reading from the lower memory for use in displaying ... -
Sudden death of ZX Spectrum 48KHello A friend gave me a 48K rubber keyed Spectrum. I brought it home, hooked it up to my little TV and powered it up. I was very happy to see t…
... issue 2 Spectrum, in which case the above is almost certainly ... RAM to be used as upper RAM rather than the Texas ... select for TI or OKI upper RAM.
Check for ... one or more of the lower RAM ICs. It's a ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... have the upper and lower ram modules installed (in my case zorn's ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... have the upper and lower ram modules installed (in my case zorn's ... -
Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…
... have eleminated the lower 16k DRAM, that leaves the upper 32k DRAM ... machine work when just using BASIC? Can you try a simple ... BASIC test program?
[b][ ... -
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 …
... adhesive. The single fixed white lower HEAD is also visible .Above ... fragile alignment of this upper HEAD. In this case though pulling it ... -
Help needed with MIA software with custom (?) loaderHi, I've got into my hands recently a bunch of Polish educational software which are unknown MIA on WOS. I believe they are protected with some…
... a master copy (from BASIC LINE 4)
0x5CDE ... Move saver and loader to upper RAM
0x5CE6 JP ... Rotate left lower byte
0xEB60 RL D ; Into upper byte
lower address bits
0xEB72 ... -
Arrays in BASICHi so I'm making this crappy game and I wanna store the screen positions of some UDGs in in a 50x2 array cause I have 50 characters. So I made the ar…
The lower screen can be addressed directly in BASIC by making it ... part of the upper screen, ... other commands can address the lower screen directly, eg:
... BORDCR (23624) controls the lower screen's colour attributes, which ... -
Arrays in BASICHi so I'm making this crappy game and I wanna store the screen positions of some UDGs in in a 50x2 array cause I have 50 characters. So I made the ar…
... 883517"]The lower screen can be addressed directly in BASIC by ... making it part of the upper screen, ... other commands can address the lower screen directly, eg:
... BORDCR (23624) controls the lower screen's colour attributes, which ... -
ZX GameDev tools consolidatedHello WoS! It's been a while, yet with a plenty of decent gamedev tools (including new ones!), is there a [i]single/pivot table[/i] or some datash…
... your game, design-wise. In case of writing a Spectrum game ... sdcc is much improved), boriel basic, etc that allow you to ... for everything.
Even lower level at the sprite engine ... -
ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... the case of the 4116s, this will be the 16k "lower" memory ... including the screen and system variables. With the "upper" 32k ... will also be in the lower memory area. Corruption of the ... -
Project: ZX OpusHello my friends, I have been in need of a push lately so I thought if I post some of the work for this project here you guys (and gals) can help me …
... routine and a bit of BASIC using INS command. I have ... could be improved as lower and higher case letters could be difficult ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... been to make a "Brace case" for it for use with ... to fit to a 48k case and for this test I ... quick test and said "lower Ram OK" then "Upper Ram OK" . I ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... 4B in a spectrum Plus Case.But it raised a ... was in a Spectrum+ case and the case said "upgraded". one end ... It displayed:-. Lower RAM faulty $7FFC : and then : Upper RAM error ... encountered. Cannot proceed further both lower and upper RAM faulty .
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... . This time Lower RAM RAM was OK . Upper RAM IC20 fault ... !
The Brace-Case I made up for it ... off . The Spectrum keyboard case needs to be totally off ... when I used this Brace-Case on the Smart Card< ... the caps will fix the Upper RAM fault . (But you ...Interupt service routinehas anyone set up a interupt service routing with pasmo? this one I tried resets the speccy EDIt- I placed the code after the END directive, I fi…
... 2
; Return to BASIC:
ei
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BASIC on a 128K machine, you ... the lower 16K of RAM has access speed issues and the upper ... 16K of RAM is paged in and out by the BASIC ...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…
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;;
;; code for pasmo basic
END $c000
;;
// offset is then lower 5bits of 1st byte combined ... , allocate full 6912 just in case
if((store=(unsigned char ...Flicker free animation in BASIC, is it possible ?With all my various noodlings in BASIC and indeed with my so far limited assembly I keep coming up with the same issue. How do you do animations wit…
... no need for the slow BASIC interpreter to do anything between ... BACKGROUND UPPER ROW" (25 chars or so)
LET B$="... LOWER ROW ...Spectrum Next in the ArchiveWhen the Spectrum Next is launched, should it be added to the archive, and games archived as per usual WoS usage? There are a lot of new games annou…
... sense, not just some contrived case where you detect if there ... , but it would be a case of bad programming. The only ... ) or indeed any of the BASIC system memory locations. The RAM ... data from the non-existent "upper" RAM to determine if the ...I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... 'd just go with the basic pistol until you pick up ... the case with a From game. Then you hit the upper levels ...endless runner project..So I'm thinking of writing a small tutorial series on writing games for the speccy in C, and figured that an endless runner would be an easy example …
... than there are in Sinclair Basic, for example.
case you're talking about ... s not necessarily the case that things will be ... This is especially the case with sdcc which can ... level language than in a lower level one.
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…
... is needed to call from BASIC, e.g. from a ... UDG character to be printed (upper case),
;; DE contains row ... /> rrca ; Move offset into upper nibble and multiply
rrca ... ; by 2
rrca ; Upper three binary digits
or ...I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... the second layer of the Lower Loran Dungeon is of course ... Loran Chalice as well, the Lower Loran Chalice Dungeon has pretty ... , it's "Boozy" with the upper case "B" (and minus the quote ...New Platform Game: "Moritz 48K"Hello. There appeared a new platform game with my music. The game has been made by Sebastian Braunert and Uwe Geiken. Enjoy. "Moritz 48K…
... my new Tardis which, in case you hadn't noticed, actually ... , you have smashed into our lower deck several times now and ... again.
"It's basic Latin, Watson. Surely a man ... was required to have a basic appraisal of Latin in order ...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…
... up the following demo in BASIC so I could get my ... speed wise for BASIC and even handles the upper and lower screen.
110 REM ZX BASIC Mouse Cursor Demo
120 ...48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... The 4116 (or equivalent) "lower" DRAM chips NEED a +12V ...
[quote="RSwipeCA;55309"]My lower RAM voltages are -5V = -029 ... 4116 "lower" RAM chips and I recommend removing the "upper" DRAM ... running the machine code BASIC interpreter program from the ...Spectrum +2 grey ear mod?Is it possible to turn the sound port on the back of a grey Spectrum +2 into an ear input? I know it's possible for the black +2 but I can't find muc…
... means that an area of upper RAM in the memory ... the display data (which is lower in the RAM) must ... fetches from the area of upper RAM in the memory ... available for use. However, the BASIC ROM is hardcoded, so it ... amount of RAM available to BASIC. But you have to ...
