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Games that crash because of contended memory.I find these are really annoying. You load up a game like Astro Marine Corps, Fantasy World Dizzy, Dizzy: Prince Of The Yolkfolk and so on (the init…
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It's a bug in the original 128 and ... I register points into contended ram. Emulators never bothered to replicate ... they are immune to the bug.
It was also ... -
Robocop 3 and Spectrum 128K toast-rackHi all, we are going on with the tests on the new 128K emulator for the V6Z80p board, and we have found something odd: Robocop 3 (designed for the 12…
... Spectrum clone) with TKMEM-128 RAM expansion ([URL="http://cantinhotk90x. ... in Portuguese[/URL]), but snow bug has appeared. :( Nevertheless the ... t=20298&highlight=snow+bug"]http://www.worldofspectrum.org/ ... ?t=20298&highlight=snow+bug[/URL]
Is this ... -
LOOK at the size of my Rom/EmulatorOk, we have 16k, 48k, 128k, even a 256 odd k Rom/Emulator But I want more :p Is there anything out there now or been worked on to give more, as the…
... /> Since you have to manage paging anyway when you have more ... 's easier than soldering more ram in anyway :) -
SE BasicAfter 13 years of development I thought I'd run out of things to optimize, but it turns out I was wrong. However, I'm now running out of time to work…
... regular). It had 280K of RAM and could run all existing ... the idea of creating a bug-free Spectrum ROM. My early ... -
FREL Comcon Programmable Joystick Interface not working on 128k but on 48kAnother day, another problem :-) My FREL Comcon Programmable Joystick Interface [url]http://www.worldofspectrum.org/infoseekid.cgi?id=1000070[/url]…
... multiplex the video RAM. The Z80, ROM, upper RAM and edge connector ... one side, and the lower RAM and the ULA are on ... put all the video and paging logic in one chip which ... multiplexing logic for the contended ram so the resistors are no ... -
Any HAM8x1 images to share?McLeod_IdeaFix's plug-in ULAplus supports the full ULAplus spec including Timex screens. SpecEmu emulates a machine with 48K timing, ULAplus, and Tim…
... /> The SCLD is just a bug-fixed ULA, built using a ... Timex. Not sure if the paging logic is on the SCLD ... -
New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…
... the standard 128 or +3 paging?[/QUOTE]
Yes, one ... will support MB02+ memory paging (allram - 512kB ram/flashable rom 512kB. Each ... rom/ram page 16kB can be used ... on ZX. Then can use paging as TR-DOS, DIVIDE, MULTIFACE ... -
New multi-interface for ZXI have in development new interface for ZX Spectrum. PCB size is similar as K-MOUSE interface and on board is CPLD (programmable logic), up to 1MB st…
... will support MB02+ memory paging (allram - 512kB ram/flashable rom 512kB. Each ... rom/ram page 16kB can be used ... on ZX. Then can use paging as TR-DOS, DIVIDE, MULTIFACE ... + support 128 or +3 style paging. For instance would you be ... -
Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... with -- and use them by paging the extra 32kB with some ... (probably the MSB) of the RAM chips to high or low ... upgrade: an 80kB Spectrum with paging! So, it could be that ... -
Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... 32k of the 64k RAM chips, but they probably ... when they installed the RAM sockets. The fact that ... linked to one of the RAM address lines.
RAM chip fault), to take ... thing missing to implement paging through OUT commands would ... -
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... ; set stack to top of RAM
call cold_start ; deal with ... /> dec e ; to top of RAM
jp test_16k ; clear normal ... RAM in case of a hard ... key repeat
ld bc, paging ; 16-bit I/O
SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... paging ; prepare for paging
ld a, %00001111 ; ROM 0, VRAM1, RAM ... (c), a ; do paging
ei ; enable ... paging ; prepare for paging
ld a, %00001111 ; ROM 0, VRAM1, RAM ... (c), a ; do paging
ei ; enable ...Nasty 'Gotcha' for multicolour timingI thought I would be better developing my multicolour routine on the 48K first, being the slowest, so it would then be sure to work on the 128K varia…
... 'm guessing it's a bug. From what I know about ... only if it changes the paging to the +3 model. I ... model +2 that has a bug-fixed HAL in it that ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... the old end-of-file bug that was supposed to be ... those at the top of RAM 0xd1ed to 0xffff. I placed ...z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…
... "do stuff" paged in contended RAM pages - we found the hard ... you paged in a contended RAM page while the I register ... machines or won't be paging in contended pages in the ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... high byte of top of RAM
ld (de), a ; ... (p_ramt), iy ; set top of RAM
ld hl, initpal - 7 ... A, 0
ld bc, paging ; VRAM / ROM
out (scld ... , paging ; select paging
ld a, %00110000 ; lock paging, ROM 1, VRAM 0, RAM ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... %00001111 ; ROM 0, VRAM 1, RAM 7
out (c), a ... ; increment DE
ld bc, paging ; page out VRAM
ld ...SE Basic IV Buffy v4.1 source (WIP)I've been doing a major refactor on the SE Basic source and I'd appreciate a code review from anyone who has time to look at it. I've almost certainl…
... %00001111 ; ROM 0, VRAM 1, RAM 7
out (c), a ... ; stack counters
ld bc, paging ; page out VRAM
ld ...128k programmingOk, I have had the normal man look (ie. not really), I want a good resource for 128k asm programming. Mostly just to find out how the RAM bank switc…
... hung up about paging in a bank of RAM and keeping it ...Downloading code to physical hardwareHi folks, Back in the day, my devkit was a TRS-80 and I had a simple connector device from the TRS-80 parallel (printer) port to the expansion bus o…
... could replace the ROM with RAM and use the Spectranet bootstrap ... ROM, if it contains a bug I'll still end up ...Downloading code to physical hardwareHi folks, Back in the day, my devkit was a TRS-80 and I had a simple connector device from the TRS-80 parallel (printer) port to the expansion bus o…
... ROM, if it contains a bug I'll still end up ... you can get code into ram and execute it you can ... into its usual place in RAM and jumping right into it ...Encyclopaedia GalacticaThis is the development thread for Encyclopaedia Galactica, the game upon which I'm currently working, along with a few others. The idea is that the…
... far. Found and fixed a bug in the stasis trap code ... has liberated a bit of RAM. I've taken the opportunity ...Changing the font in z88dkEither I've got this backwards or the documentation is incorrect... :smile: "[URL="http://www.z88dk.org/wiki/doku.php?id=platform:zx"]The standard Z…
... is (ROM/RAM, eg) and (optionally) what the paging state will be ... applications with some ROM, some RAM, perhaps not contiguous in the ...Writing faster BASICIn terms of structuring BASIC programs, what are the best ways allocate variables, functions, arrays? Any tips. I remember INPUT mag had some suggest…
... no particular limit, other than RAM, as to how many lines ... . One that wasn't a bug was EX AF,AF'; it ...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'…
... in at the bottom of RAM in place of the normal ... is independent of the memory paging bits, but they're all ... on the middle 16K of RAM to be operating at full ... space and just have 4 RAM blocks in a row, a ... advantage is that changing the RAM page is very quick - ...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'…
... There are a few additional ram banking configurations, which allow some ... partially because some third party RAM packs didn't support them ... than one bank of 64K ram for paging, allowing for a maximum ... of 512K RAM in total (though ...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…
... bank switching (or paging) could have ... />
0x8000 RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM RAM
to (8k) ... br />
0xA000 RAM RAM RAM RAM RAM…Which Emulator supports Betadisk48?Hi out there and happy new year, I'm looking for an emulator to run with my vision1.7 trdos-rom in 48 mode. Unfortunately most emus only support Bet…
... 48K, using the 8K RAM of a MF1 to include ... EPROM TK, a
paging mechanism exists to activate at ... (3C6Bh) - Entry point for "paging" the rest of the EPROM ... 48 uses 112 bytes of RAM in BASIC variables (23734 ... uses *133 bytes of RAM in BASIC variables (23734 ...PlusDlite problems with 128K modelsLast year I developed the PlusDlite, and already shipped out a couple of them. Only recently I discovered some problems with 128K models. I remember…
... RAM and disconnected /CSROM.
This way I could test if paging ... , addresses that trigger the PlusDlite paging in are run, for example ... in).
But as disabling paging in when address 102 (#66 ...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... the text to virtual screen ram so maybe the code can ... reload print.a80 - i fixed bug
[URL="https://www.dropbox ...
