-
LOAD "" CODE in machine code/store 128 bank dataHow do you LOAD "" CODE from machine code? I have written the following MC routine that fits into a REM statement in a basic program. I want to cal…
... loaded 16K worth of 128 code in bank 6?
[CODE ... loading screen
;LOAD 128 bank 6 code
;LOAD ... -
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…
... 2A/+3 and 128/+2 have different memory bank models, does not ... page really talking about the 128?, bank bit B0 implies odd pages ... should be contended on a 128.... or is that the "bug ... -
What are editor scratchpads?I've been reading and experimenting with 128 bank switching and using the shadow screen. The technical reference [url="https://worldofspectrum.or…
... been reading and experimenting with 128 bank switching and using the shadow ... -
Skyscraper of Doom - anybody willing to help?As some of you may remember I've written an adventure game called Skyscraper of Doom: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0023027[…
... free a few kB. Change interrupts from IM1 to IM2 (I ... buffer for data and in 128 models interrupts use this area). Maybe ... -
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…
... chance to trigger up to 128 different interrupts (addresses take two bytes ... be using IM1 for software interrupts, but of course unless you ... you're writing for the 128 you may as well assume ... -
LOAD "" CODE in machine code/store 128 bank dataHow do you LOAD "" CODE from machine code? I have written the following MC routine that fits into a REM statement in a basic program. I want to cal…
... loaded 16K worth of 128 code in bank 6?
[CODE ... load_routine
[/B]
;LOAD 128 bank 6 code
[B] ld ... -
128 ROM paging alternativeWould this work (with the appropriate code in each ROM)? [code] ; 128 rom paging routine ; use rst 28h with call address stored after restart ;;rom…
... />
[code]
; 128 rom paging routine
; use ... address
di ; disable interrupts for page
out ( ... />
ei ; enable interrupts
ret ; call the required ... />
ei ; enable interrupts
ret ; back to the ... -
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…
... I was wondering how the 128+ models managed to work with ... 'm somewhat familiar with how bank switching works (I believe the ... -
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…
... which is in the 16K bank $4000-$7FFF. Hence ... br /> When going into either 128/+2/+3 Basic and using ... in, so without any bank switching, that is where ... ?
The 128 ZK Spectrum reference FAQ says ... screen. I understand that bank 2 is already resident ... -
128k Screen Flipping - Sample Code PleaseI know this has been covered before, but I cannot find out code to do the following: On a 128k Spectrum tell the speccy to display from address 4915…
... /> When memory is being paged, interrupts should be disabled and the ... br /> | Bank 0 | Bank 1 | Bank 2 | Bank 3 | Bank 4 | Bank 5 | Bank 6 | Bank 7 |
bank switch on the 128 is:
LD ... -
Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…
... thing: Spectrum Basic 48 and 128 runs in interrupt mode 1 ... you Load any code to Bank 7, it will get corrupted ... complete assembler loader which disables Interrupts (DI) before loading code and ... mode if they are using Bank 7 (except for the second ... -
Usr 0 ?I'm not sure I've ever seen this explained before, but why do some programs (only demos, as far as I can see, so far) need USR 0 mode when run on a 1…
... ). This interface puts a Spectrum 128 permanently in USR 0 mode ... must enter POKE 23388,Bank+16: OUT 32765,Bank+16 in 128K ... is checked every interrupt, and Bank is switched to the number ... the "Interlace" screen-switching on Interrupts, so the current screen Bit ... -
How to create .TAP that loads into high memory banks?I want to create a program that uses the extended 128k memory, the banks that can be switched into the 0xc000-0xffff area. For the simple stuff I've…
... I'm wrong and the bank switching doesn't happen in ... to ROM 0 via the bank switching routine located at ... beyond my knowledge of the 128 Basic ROM I'm ... USR 0 mode, the bank switches you perform with OUT ... 0 (whether that's in interrupts, or between commands) is ... -
Games featuring... relevant bugsThere was a recent improvement to the WoS database in order to classify [URL="http://www.worldofspectrum.org/forums/showthread.php?t=34261"]Games fea…
... also doesn't load in 128 mode. There appears to be ... is loaded into ram bank 2. Unfortunately, as bank 2 resides at ... crash. Secondly, a problem with interrupts when decoding a level. Snaphots ... -
Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... buffer in a contended bank of the 128 if I could avoid ... operation can be synchronized with interrupts, then you can combine both ... -
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…
... The problem was that Interrupts where enabled by bank switch function, before ... code, since HALTs without Interrupts should freeze CPU forever.
128,256,512).
... only happens when switching Bank mode from Write to ... -
Football Director 128Sorry if this has come up before but having downloaded Football Director 128 when I try to load it it always seems to crash on the title page. Any o…
Sorry if this has come up before but having downloaded Football Director 128 when I try to load it it always seems to crash on the title page. Any one know what I'm doing wrong? Does anyone else have this problem?
Cheers!
Paul -
128 +2 video connections.I have just got my hands on a Spectrum 128 +2 grey model all in working order, what I need to know is if I take a signal from the CVBS Composite Vid…
... my hands on a Spectrum 128 +2 grey model all in ... -
Stop me from blowing up my original Spectrum 128!I have a Spectrum 128 (not the +2), and I want to play some of those old classic games again. The trouble is this. I still have the original Power Su…
I have a Spectrum 128 (not the +2), and I ... it will work on the 128, but...
I'm ... -
ZX Spectrum 128 BoxedRoll up, roll up ... etc ... I've eBayed two of my Speccy 128 machines. Only a few days of bidding left ... Take a look if u r interested in acquir…
... eBayed two of my Speccy 128 machines. Only a few days ... a boxed Spectrum 128 machine, and a Spectrum 128 machine without working ... as I have another boxed 128, so these are spares. -
Multiface 128I have a Multiface 128 which I'm thinking of selling... Only thinking of it... The button and case are damaged, There are some aesthetic defects (I s…
I have a Multiface 128 which I'm thinking of ... -
Multiface 128Greets :) I am after either.... a) Somebody willing to sell a working one or b) Somebody who can repair a red button activation problem AND/OR so…
Quiz 14(ish)- Giddy up horsey.. whooo! Ok, 10 quick fire questions.. Some cryptic - you`ll have to unravel the clues to get the game name, Some are description of the game. Others are in…
... not included on the Multiface 128 -
what were they?
Claw Line and Cinder Bank are further clues.
Name ...West Bank XxI released!Hello all of you! It's the first time I write in this forum, so I'll present me: I'm the webmaster of Computer Emuzone, a page dedicated to the span…
... software) of the classic West Bank (Dinamic, published in UK by ... />
Its name is "West Bank XxI". Please check it and ...Spectrum 128+ production periodMy favourite version of the Speccy is the 128, the heatsink version, and I'm wondering when mine was made. I got it Xmas 1986 (after seeing the +2 on…
... of the Speccy is the 128, the heatsink version, and I ... they stopped producing the original 128's?My Speccy 128 gets wobblyI'm having trouble with the picture on my 128+. The picture starts flickering like crazy until it's unusable. Sometimes I turn it on and it's okay, b…
... with the picture on my 128+. The picture starts flickering like ...
