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128K Contention - How to get it right?With my recent hardware hackery, I've built a 128K (toastrack) clone. I can't quite get the contention right though. What I'm lack is a clear descri…
... :
[code];; Distinguish between 128K and +3 by looking at ... IO where a contended memory bank is paged in at 0xC000 ... induces memory paging on the 128K (and doesn't on the ... ). Well known bug in the 128K ULA.[/quote]
For ... -
binutils questionSince there's a few people using binutils these days I thought I'd give it a go and see whether it solves my hunt for a replacement assembler/librari…
... the 128k spectrum, eg. One section for #c000 - #ffff in bank 5 ... , another for #c000-#ffff in bank 7, etc. You also do ... -
binutils questionSince there's a few people using binutils these days I thought I'd give it a go and see whether it solves my hunt for a replacement assembler/librari…
... the 128k spectrum, eg. One section for #c000 - #ffff in bank 5 ... , another for #c000-#ffff in bank 7, etc. You also do ... will help making programming for bank-switchable machines easier, but it ... -
Spectrum DIVIDE and Kempston Interface ProbsI got my DIVIDE quite a while back and was using it on a Spectrum +3, but noticed some games loading corrupt and not all games having proper joystick…
... /> Also to confirm the Spectrum+ 128k Heatsink Model has support for ... setup would be a Spectrum+ 128k Heatsink Model (full support for ... to the DIVIDE and to swap between using a 2 port ... -
New tool: SnapToTap R2it's basically a gui update to VSC. But it's now simpler to convert sna files into tap files. what is special about SnapToTap? it converts snapshots…
... at the start, and for 128k games will probably have to ... are complicated slightly for the 128k, I need to work out ... 'll have to stop and swap memory pages around.
writing an emulator-newbie needs helpHi, this is my first post here. I decided to write a minimalistic emulator of ZX Spectrum-no emulation of advanced peripherals, no emulation of sound…
... be enough. You'll want 128k emulation. Then +3 emulation. And ...Paging memoryI've been thinking about a possibility of paging blocks of memory to and from disk. Imagine dividing usable 32KB of Speccys RAM (why do they call it …
so how much ram does the 128k have?
Is bank 5 ram? what about Bank 7? The ULA can draw the screen from either.
:)Unboxing my old SpeccysToday I dug out my old collection of computers from the bygone age. My ZX81 fired up fine, but it looks like the keyboard membrane is goosed, as on…
It could be the cables, I'll swap them round. Rushed for time at the moment, and I've still got a 128k, +2A +2 and +3 to test, not including a QL!What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... than it does on the 128K.
Sinclair never make ... />
My advice, make the bank contention model switchable - either a ... still be a difference between 128k models... But don't quote ...What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... would be games developed for 128K heatsink model, as Amstrad models ... the bulk of software from 128K heatsink era.
[QUOTE ... ;581997]My advice, make the bank contention model switchable - either a ...What paging scheme is the "standard" for 128K models?Sinclair implemented an arrangement so that even numbered pages are non-contended, and odd numbered pages are contended (quoting from memory, haven't…
... by checking the paged in bank against the BANKNM sys variable ... so crude - it distinguishes the 128K/+3 by looking at the ...Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... of contended memory on the 128K machines. At different times I ... to page in the relevant bank at the top of RAM ... , then page the original RAM bank back in and run the ...Z80 Cross-assemblersI need to build some code which contains sets of routines which run at one address but are stored elsewhere. Unfortunately, neither of the assembler…
... of contended memory on the 128K machines. At different times I ... to page in the relevant bank at the top of RAM ... , then page the original RAM bank back in and run the ... problem.[/QUOTE]
hmmm 128k version of AGD perchance? ( here ...What was the best Designed Speccy???So what does the World Of Spectrum think the best Designed Spectrum was? [URL=http://imageshack.us/photo/my-images/845/thespectrums.jpg/][IMG]http:…
... of view, the bank switching on the various 128k models is a ...FPGA ZX SpectrumJust wonder: how many of you would buy "new hardware based" and "in case" ZX Spectrum based on FPGA? ;) [url]http://www.fpgaarcade.com/[/url]
... it back in. The memory bank paging is such a pain ... concern is the ability to swap screen buffers. Then you don ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... everything out with a massive bank of 256 UDGs, then you ... />
Or just use a 128K Speccy, which can page screens ...Screen routinesHello. For my games I?m using the sprites routine method of a screen buffer and when I finish to print all the sprites I dump all the buffer in the …
... everything out with a massive bank of 256 UDGs, then you ... />
Or just use a 128K Speccy, which can page screens ...House of Hell gamebook conversionAs there's potentially several people working on this I thought that I'd set up a thread in the correct section, rather than it continuing in Wanted …
... practical to swap it out and reload it unless the 128k model ...what is this crazy modfound a speccy in my loft yesterday,and it seems to have an external heatsink modd i havent the foggiest about speccys heres a few pics [url]http://i…
... , whats puzzling is that RAM Bank 2,4 and 6 are ... faulty, and thats just for 128k machines! Never had that happen ...Ultimate Collected Works, no Underwulde, why?I managed to get my grubby paws on the "Ultimate Play The Game" "The Collected Works" off E-bay.... The set has 1. JetPac 2. Pssst 3. Tranz-AM 4. Co…
... /> [/code]
On the 128 $7FFD is the paging control address ... the keyboard, they work in 128K mode. Am I being stoopid ...Double Dragon Remake: The Development ThreadOk guy's, so this is the new thread that will be focusing on Jim Bagley's development of the Double Dragon remake that was first proposed by myself a…
... always in an uncontended RAM bank. I'm not sure if ... /> They are listed in the 128k reference on the Sinclair FAQ ... [/url]
summary:
128k and +2: pages 1 3 ...Precisely timed loops in assemblyI'm looking for a way to make my code stop until the raster has reached the lower screen border (right after having drawn the last pixel line). I und…
... linked, timing varies between 48K, 128K, +2A (and Pentagon) machines, but ... some silly buggers like to swap the ROMs around.Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... could be incompatible with a bank switch.
So, ... and #F8
Bank: or 0 ;POKE to Bank+1 address to ... which RAM bank to write to
ld BC, #7FFD
... , (#5B5C)
ld BC, #7FFD
out (C), A
Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... /> Because the Loader option uses 128K BASIC, so BANK_M is valid ... botting your +2A and enter 128K mode. Then, go 48K mode ... , then will load the first bank, then crash/reset. Put a ...RFC: Hardware Documentation ProjectI've noticed quite a few threads recently about missing schematics and suchlike. I've also been thinking about the low quality of some of the schemat…
... [/url]
Forcing a 128K/+2 grey computer to boot ... repair: damaged memory in one bank that makes memory in the ... other bank to behave as if they ... a colour video on a 128K heatsink, and adding audio to ...Maritrini and Cray 5 loading problemsHas anyone else here had issues loading either of these on a 128k? No matter what I try, both these games refuse to load properly. I can get both t…
... ]Because the Loader option uses 128K BASIC, so BANK_M is valid ... botting your +2A and enter 128K mode. Then, go 48K mode ... , then will load the first bank, then crash/reset. Put a ... , I usually load all my 128K games using loader!
A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... into a different bank (when BIFROST* hopefully provides 128K support in a ... have different requirements for supporting 128K machines, in this case we ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... into a different bank (when BIFROST* hopefully provides 128K support in a ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
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[QUOTE=Crisis;609557]128k zx has different timing so ... NOT gonna ask for an 128k version[/QUOTE]
Even ... , I'm planning to add 128K support in the next release ... 2 frame animations in the 128K using bank switching? This won't ...
