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128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…
... results....
For 128K spectrum:
bank 1 BC counter is ...
For +3 spectrum:
bank 1 BC counter is 11 ... more instructions in the uncontended bank than the contended one in ... which is uncontended on the 128K/+2[/quote]
should ... -
Help with a TIMEX TC2048 and memory problemBought a 2nd hand Timex TC2048 but unfortunately I detected a problem with the machine which is preventing it from working properly. I believe it …
... -FFFF which is the 32K memory bank, right?
The machine ... , 9, 10 ,11 - the 32K memory bank ) with the same brand and ... type of memory chip.
[img]https ... -
Need Some Basic HelpHi all, I’ve decided to give programming in Spectrum Basic a go again (bit of nostalgia trip!) and I’m trying to develop a CYOA style game. How…
... it fit in the limited memory in a single load?
If so they're memory hogs, so its the story ... 't know enough about expanded memory, bank switching or Spectrum type disc ... -
Can I record binaries from any emulator with Basic commands, machine code, macros or something?Hello I do not know if this is the right place to put this question Normally with ZXSpin if I want to save a binary file, I'm going to: file ->…
... address range from a specific memory bank straight to the PC disk ... -
SpecBAS really needs a manual!That Word doc that I converted to an RTF for you Dunny and ASH-II, is still somewhat sparse. I spent bloody hours PLOT/DRAWing a landscape to steer m…
... , so they're stored in memory banks.
The GRAPHIC ... a picture so creates a memory bank to hold it, and then ... variable will be given the Bank's ID number when it ... from "filename.png" into a bank. "mygfx" is a variable that ... -
New game: DOOM PITHi everyone, I am proud to announce the exclusive physical release of [b][i]Doom Pit,[/i][/b] the official sequel for Clive Townsend's previously …
... 's experience, for instance:
- memory bank management and/or disk loading ... -
Its Saturday, my favourite day, and I'm going to celebrate by playing...[url="https://www.worldofspectrum.org/infoseek.cgi"]Yeti by Cybadyne, 1988[/url] I did a random pick and this is what I got...
... arcade shooting gallery game for 128K Spectrum's. It's certainly ... making good use of the 128K memory with in-game AY music ... -
type in to learn about IM2I'm trying to mess around with learning about IM2 and I found a nice little article in Sinclair User September 1988, issue 78, Page 70-71 [url="https…
... , the routine works on the 128k models too, as long as ... .
The 128K editor uses the upper memory so you can ... really want to use more memory, you could relocate the interrupt ... do something special with the 128k memory. -
NOMAD data formatApropos of a discussion in the WoS Facebook group, I wondered how easy it would be to work out how the map and graphics are held in N.O.M.A.D. Just i…
... attempt to add support for 128K memory or the AY chip -- especially ... a [i]bona fide[/i] 128k version already existed. -
NOMAD data formatApropos of a discussion in the WoS Facebook group, I wondered how easy it would be to work out how the map and graphics are held in N.O.M.A.D. Just i…
... attempt to add support for 128K memory or the AY chip -- especially ... a [i]bona fide[/i] 128k version already existed.[/quote]
Fruitcake Ram Tester - What does CORRUPTS mean?Hi All, Getting the message "Corrupts" as in "Corrupts 1" showing up on my test... What does this actually mean? The documentation on the site doe…
... the era, as the upper memory above 512K to give the ... I could have desoldered my 128K memory and put them in my ... so to buy new ones.. Memory was crazy-expensive at the ...The "Kiddification" Continuum : "serious" 48k software versus "kiddified"128k software?Of course this is a gross simplification . The idea of a straight line continuum with "serious" 48k software on one side and "kiddified" 128k softwa…
... assessing the reduced signifiance of 128K BASIC . But I think " ... factors include the lack of 128K books , magasines and other " ... how to do it" 128K BASIC training material . By then ... by the BANKS of the 128k memory . How would a novice programmer ...What Good Serious Successful Software Was Written Exclusively in 128K BASIC?I realize now that 128K BASIC has its serious enthusiasts . But I know very little about this type of BASIC . What good titles were written exclusi…
... standardized implementation of the 128K BASIC cost it dear ... and approaches (to using the 128K memory) ,it was impossible to ... that a potentially "serious" 128K machine BASIC could not be ... for serious 128K BASIC applications ,. And the 128K's hardware ...Football Manager revisitedHello everyone The latest version of my Football Manager Revisited game is now available. you can download it free of charge here: [url="http://fm…
... etc and adding new features. 128K Basic is 99% the same ... is in Basic. Even using 128K, memory space has always been a ...Killed Until Dead - Spectrum 128K versionI first got hold of this game about the same time as the film "Clue" started being shown on TV, and there was a "Miss Marple" series on TV, followed …
... turbo loader high in memory and some operating code ... />
The 128K version does away with everything ... , but the control selection is only set up ... selection menu can be moved out to another RAM bank on the 128K ... routines from lower in memory to this area, ...Midi Out from machine codeI need to send midi-signals by machine code, while Basic is too slow for my current project. I already read I can use hookcode #11E, but I have some …
... in bank 7. Note that this does not affect the memory between ... 0x4000 and 0x7fff, which is always bank 5 ... />
Bit 5:If set, memory paging will be disabled and ... of ROM selection. The four ROMs are:
ROM 0: 128k editor ...+2A extended memory map & ULA bug?The [URL="http://www.worldofspectrum.org/faq/reference/128kreference.htm"]128K reference page[/URL] says: [quote]The ULA bug which causes snow when I…
... org/faq/reference/128kreference.htm"]128K reference page[/URL] says:
memory still occurs, and also ... set to point to contended memory.[/quote]
Will ... paging mode, with RAM bank 4 (contended memory) in 0x0000-0x3FFF, and ...Quick question regarding contended memoryIf I've read the documentation correctly, the following applies: 128k/+3 "Memory banks 1,3,5 and 7 are contended" +2A/B/+3 "RAM banks 4, 5, 6 and 7…
... following applies:
128k/+3
"Memory banks 1,3,5 ... speed on all machines, only bank 0 and 2 are usable ...Coding for 128kHi all, I wonder if anyone can suggest any useful reading/threads/examples on the fundamentals of 128k coding. Chapter 24 of the +2 manual has prov…
... /examples on the fundamentals of 128k coding.
Chapter ... 16k uncontended memory banks from 0-65535.
Setting BANK 7 ... the instruction. The screen memory in bank 7 is a 49152, ... not necessarily decided on the 128k only route, I though it ...maximum addressable RAM for a Z80 using bank switching?What is the maximum addressable RAM for a Z80 using bank switching? The Enterprise64 home computer could address up to 4MB, is this the limit for a …
... RAM for a Z80 using bank switching?
A bank switching scheme allows the memory to be expanded ... as well. On the 128k model, the additional 64 ... to 251. The remaining memory space can be used ... by external devices and memory modules connected to the ...Toastrack/Grey +2 physical memory layoutI'm looking to extend the functionality of the test ROM used with Winston's diagnostic board to also properly test the RAM of toastrack and grey 128K…
... RAM of toastrack and grey 128K machines.
As ... clear to me how the memory is physically laid out.< ... what corresponds to contended/uncontended memory.
Could anyone ... IC's (e.g. bank 0, bit 0 to IC15 ... , bank 0, bit 1 to IC16 ...48k memory dump to 128k???Having problems getting a 48k snapshot to load into 128k mode using ZX Spin. Tried saving 48k memory as a binary file and loading it back in 128k mo…
... into 128k mode using ZX Spin.
Tried saving 48k memory ... as a binary file and loading it back in 128k ...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…
... of memory?
I'm somewhat familiar with how bank switching ...Pickles and Pearl 128kHi, After abandoning my game Pickles and Pearl in 2008, I did a bit of work in 2020 to make it 128k and have bank switching and music etc. I ha…
... 2020 to make it 128k and have bank switching and music etc ... , but this version does have memory fixes and runs pretty well ...80x24 mode (Timex required)Hopefully Martijn will be adding this to the archive soon, but until then grab it here: [url]https://dl.dropbox.com/u/15659782/BASIC80.zip[/url] Th…
... /> [quote]You have the EXROM bank with 8k spillover ROM. This ... possible to connect an additional 128K of RAM.
[quote ... that can disable all internal memory.[/quote]
I thought this ... there's no independent colour selection in hi-res mode.harvard architecture spectrum clone.I got my first +2 before christmas. I'd never given the 128k spectrums much thought, always been a 48k rubber key tradionalist. :smile: I've been me…
... based computers, I think the bank switching (or paging) could ... possible banks of 8k from 128k
0xA000 ... possible banks of 8k from 128k
0xC000 ... and RAM selection
Bit 3 is external memory control for ...If you had four roms...Just wondering if you were designing a Spectrum from scratch, and you used a 27512 EPROM, which would hold about 4 spectrum roms, what you would inst…
... normal 48K speccy to 128K with full compatability with ... the mainboard, add the bank logic, some ROM changes ... lower memory, but I intend to find a good selection of ... work out optimal ROM selection to fill it, and ... to add to the ROM selection.
I ...
