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Strange behaviour in real hardware but not in emulatorsWell, at least not in any emulator I've tried. I've been reported by fellow forum member Macc that both our Maritrini Monster Slayer and Retroworks'…
... that all of my previous 128K games which use splib2's ... releases page in a contended memory bank while I contains $F1? The ... -
Red DwarfA Red Dwarf video game - good or bad idea? (given its recent resurgence in popularity in the UK) My ideas: [b]Plots[/b] - An interquel which bridg…
... as na_th_an says, the 128K Speccy is just like a ... banks that make up the 128K total.
... RAM where the screen memory normally sits. The bottom ... is always the same fixed memory bank. If you want to ... affects half of the memory banks. And the banks ... -
Definitive list of games incompatible with +2A/+3 and of compatible versions (if any)I am trying to compile the definitive list of games which are incompatible with the +2A and the +3 and of their compatible versions, if they are pres…
... introduced with the Sinclair/Investronica 128K. Will activate a copy ... any). Reserves part of memory bank 7 to the RAM disk ... 48 BASIC mode in the 128K start menu - Activates the ... undocumented) with the Sinclair/Investronica 128K. Activates the copy of the ... -
Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…
If there's a 128K only version, can you (if ... the MK games using the 128K versions where possible, however with ... * it was it used a memory bank that was being used by ... -
Finders Keepers+I know a few of you are interested in this project so I thought it was about time I started a proper thread for it rather than just slipping bits int…
... 725638]If there's a 128K only version, can you ... the MK games using the 128K versions where possible, however ... was it used a memory bank that was being used by ... 't ensure all existing 128K Spectrum games could be ... with the maze in 128K mode that needs sorting ... -
128k gamesHi. I've come to World of Spectrum for advice. I'm a Commodore guy OK, please be nice to me, as I seek your wisdom! I love the Commodore 128, and I'…
... memory banks suffer the same contented access slow-down as the bank ... see why developers used the 128K memory as little more than extra ... could copy data from one bank to another almost as quickly ... the same address in another bank. And you could always use ... -
Calling people with Diagboards.....and who have toastracks or grey +2's with all socketed memory :) I'm finishing off modifications to the Diagboard firmware to expand its testing c…
... test (does setting a memory location affect the locations around ... /> [*]128K - pages in all banks except bank 5 in ... above tests on each bank. If this passes, ... each bank, pages the bank out, then pages each bank in ... method of testing the 128K memory, I'm all ears ... -
Loading data from 128 memoryAfter all these years I have come across the LOAD! in 128 basic for storing/restoring data in the 128 memory. How do I go about implementing this in…
... extra banks as unformatted memory like all the rest ... treat the entire 128k memory space as linear memory and are able ... from tape into the main bank, then ldir it to ... , your linear view of memory can map like this: ... is the main 48k spectrum memory, 64k+ can be all ... -
Learning Machine Code the +2a wayHello again all, I thought I'd ask in this forum as the other categories seem less relevant. I keep re-reading the thread below with the advice given…
... interrupts, rs232, accessing the 128k memory through bank switching, the ramdrive, they are ... -
BIFROST* ENGINE 1.2 released!Another improved version of the BIFROST* ENGINE is now available! Download it here: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0027405[/u…
... possible to use double buffer (128k) to overcome partial refreshing ... 2 copies of BIFROST* on memory (one copy to display ... would have to add some memory switching logic, readjusting timings ... both copies of BIFROST* at memory bank 2, your multicolor tiles ... -
Alkatraz Protection System - "How to" and compo?I'm thinking about writing a "how to" regarding the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0020807"]Alkatraz Protection System[/URL].…
... /> C.S128 - 128K counter only with bank support
M. ... S128 - 128K message scroller only with bank ... support
MC.S128 - 128K message scroller ... the 128K sources, then you would also specify which memory bank the ... -
Banked memory running slower?I've just compiled a TAP which includes bank6, it loads ok, but the routines that are paged in run slightly slower. The Z80 snapshot has no such pro…
... a different memory bank?
If so which memory bank would be ... ]
On the 128k and +2 the odd banks ... you want to use bank 0 or 2 for ... timing critical code. Since bank 2 is always paged at ... choice, you must page bank 0 if you want uncontended ... -
Testers for new z88dk clibA long (long, long, long) time ago a few people offered to help test the new clib in z88dk. Much time has passed since then and I won't hold people,…
... the 128k bank switching ...
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; memory model ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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... memory bank ... -
I'm writing an Operating SystemOkay this might seem like a bait thread, but I am legitamately interested in figuring out how to write a multi-process system for the ZX Spectrum (no…
... being experimented with include the 128k spectrum, msx2, cpc, etc ... one process in the same memory bank.
Symbos ... granting each process its own memory space. The spectrum, ... capability to support the memory model. Unfortunately it is ... -
EmuZwin 128k banks in assembler Having looked at the assembler help file " ORG [{ RAMn | ROMn },] #target_address [, #dest_address ] Defines target assembling address and ta…
... .
'While compiling to memory bank 16k, address must not exceed ... the 128k bank stuff first.
I originally had the 128k bank ... going to be a huge bank of numbers and I ...
So EmuZwin wants the 128k bank stuff listed first.
How did bank switching work on the 128K Spectrums?I'm new to Z80 and ZX Spectrum. So I was wondering how the 128+ models managed to work with more than 64K of memory? I'm somewhat familiar with h…
... in comparison to the other 128k models so aiming for ... major problem with 128k banking in that different 128k models have ... different pages contended. On the spectrum memory ... is located in a contended memory bank (this means the I ...Knight Lore disassemblyHi, Not quite sure if this belongs here or in "Games" but figured it's more likely that developers would be interested. I've just released the …
... 253 is used by 128K Spectrum for memory bank switching, but this model ...128K programmingDoes anyone know any good resources on assembly programming for the 128? All I'm after is an "idiot's-getting-started-guide" on how to utilise the…
... Z80 can address 64k of memory, these are divided into ... either the 48K or 128K ROM bank paged into it. The ... last 16k can have any bank paged in. In addition, ... paged in to the top bank).
Stick ... ways to use the extra memory:
1. Back ...ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... BANK.
From the schematics, I found that It uses memory ... to serially pump/populate selection register with data.
bank selection code from RAM.
... /> However, trying this serial selection is probably a nightmare to ...Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …
... with the shadow screen at bank 7, the attributes there remain ... be falling through to the bank switching routine for the third ...Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …
... the shadow screen at bank 7, the attributes there ... falling through to the bank switching routine for the ... comes to using the 128K memory, like let's say ... mess with the extended memory ASAP and then have ... 128K version is to navigate around in terms of memory ...Ooze, Andy Johns - 2017Here is Ooze by Andy Johns, written using AGD Hacking and additional code David Saphier Music by Miguel and Raydan. http://zxbasic.uk/uploads/o…
... Alessandro
The original 128k tap is as follows :
@40000 data, this extracts to memory bank 4 @ 49152 after it has ...+2 grey booting in 48k modeI have been doing some research here after reading in spanish magazine microhobby a modification that allows the +2 to boot straight into 48k mode: …
... memory so that at least some games will recognise its a 128K ... just entering SPECTRUM in 128K Basic really I ... the setting of the memory bank registers, if you have ... modifications, the RAM bank switching in the normal ... the normal +2 ROMs (128k BASIC, PLAY, RS232 ...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…
... (however tenuously) is that the 128K models operate by switching banks ... OUT 32765,(16 + number of memory bank required) to switch between them ...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…
... OUT 32765,(16 + number of memory bank required) to switch between them ... ?[/quote]Not really. Before the 128k model, there was an internal ... having 80k of RAM. And bank switching has been around since ... And POKE can access any memory within the current CPU map ...New Utility to Transfer Z80 Snapshot to +3 DiskSince getting a Gotek for my +3 it has been my go to machine. The biggest downside however is the lack of older games on disk format with pretty much…
... I could decompress to each memory bank/page without the need ... extra memory banks are used even if it is a 128k ... off.
Useful for 128k snapshots with erroneous data in ...
3: force 128k. Overide automatic 128k-48k conversion if extra ...
