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yeah - unix for zx spectrumI started a new hobby project. An operating system for ZX Spectrum. A unix clone. Talked to my friend about it and he asked me what if after I'm done…
... spectranet itself has code in ROM to emulate the BSD socket ... even pieces of code including IM2 could be stable, though they ... .
As far as IM2 is concerned, I think unless ... support more than one im2 vector table. Additionally, IM2 is for servicing ... -
Beepola Source CodeAs I haven't done much with it for a few months, I'm releasing the Beepola source code in case anybody wants to play about, add to, or otherwise use …
... speccy memory image with the ROM (if needed by the player ... : iVectorTableLoc - for engines that use IM2, this is the desired location ... -
Question about divide +Hi A friend has sent my a faultly divide + to see if I can repair it. If I use this divide+ with a spectrum 48K (That works perfectly with my stand…
... original DivIDE 32kBram+8kB rom. This way enable installation ... plus contain also 512kB rom = on DivIDE Plus ... 16kB ram/rom paging instead original ZX rom. RESIDOS ... MOUSE TURBO interface and IM2 vectors in your ZX ... return value #FF for IM2 vector
3) add ... -
Back to BASIC[U][B]Archaeology guide to programs compiled used MCODERII.d[/B][/U] After various people have been talking about "Frank'n'stein" I decided to finis…
... likes to jump into the ROM at non-standard entry points ...
;TEMPS is the standard ROM routine at 3405
LD ... 242 248
;BEEP is ROM routine at 1016
CALL ... at 53361 puts us into IM2 mode
LD HL, 53361 ... -
Why doesn't my routine work?I have a "level" defined by 504 bytes (28 squares across x 18 squares down) I'm trying to write a routine that will take an X,Y coordinate in pixels…
... to work if you set IM2 to your own vectored routines ... /> to read keyboard and let ROM set EI back. -
Help Wanted: Playtest BUGFIXED games!There's an ongoing effort at WoS to fix classic Spectrum games with serious bugs that make them impossible to complete, crash frequently, etc. More d…
... release for IM2 table I=#39 ; not work on +3 rom
I corrected vector for IM2 and crash helicopter -
Help Wanted: Playtest BUGFIXED games!There's an ongoing effort at WoS to fix classic Spectrum games with serious bugs that make them impossible to complete, crash frequently, etc. More d…
... release for IM2 table I=#39 ; not work on +3 rom
I corrected vector for IM2 and crash helicopter[/QUOTE]
AY DetectionOff the top of their heads, does anyone know how Exolon detects that an AY chip is present? Reading and writing from the PSG registers seems to work…
... me that the 1982 48K rom is different to 1986 48K ... rom, at least in terms of ... as the IM2 vector table), and this Exolon problem, what ROM would ... happier if it is a rom byte detection issue.
general beginner queriesHi, I bought myself recently a +3 and a devide extension. I was not in touch before with the speccy, but I am really surprised and delighted about th…
... stability of data bus with IM2 vector
- enable read value ... #7FFD (detect ram page, videoram, rom ... )
- new version of K ...z88dk hates me =(Hello there my fellow WoS'ers Under the power of darkness I was about to settle in and play with some SP1 sprite handling (as printf is simply NOT f…
... is incompatible with the ROM, in particular the ROM interrupt service routine ... to disable interrupts or use IM2 mode. I would then use ...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…
... if I'm setting up IM2, right?[/QUOTE]
ROM has a table of ... ff bytes to use as IM2 table, something that broke ... few bytes in the ROM are whatever they are ... to terminate ISRs while in IM2 mode.
Honestly ...SP1 library questionsI'm working on my first game. I've not written a game since the late 1980s and that was a text based multiuser dungeon for BBC Micros with econet... …
... disabled interrupts (the normal Spectrum ROM interrupt routine was being run ... just guessing that something the ROM interrupt routine does was affecting ... if I have my own IM2 routine?SP1 library questionsI'm working on my first game. I've not written a game since the late 1980s and that was a text based multiuser dungeon for BBC Micros with econet... …
... disabled interrupts (the normal Spectrum ROM interrupt routine was being run ... just guessing that something the ROM interrupt routine does was ... This is incompatible with the ROM ISR as, at minimum, ... if I have my own IM2 routine?[/QUOTE]
...PC ZX Parallel interfaceIs any working PC<->ZX interface based on LPT cable implemented ? I know that DR.Beep were posting about such solution long time ago, but I could not…
Thanks, some translation needed first.
Not used part of ROM = typical IM2 vector table area ?
Looks pretty simple, I wonder if using 8255 would help anything.PC ZX Parallel interfaceIs any working PC<->ZX interface based on LPT cable implemented ? I know that DR.Beep were posting about such solution long time ago, but I could not…
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…
BAD DREAM game use incorrect IM2 vector tables in ZX48 rom and crash if +2A/+3 roms is used. Here is fixed version (unpacked - ready for translation to english...):
[url]http://velesoft.speccy.cz/other/games-+2a-fixed_im2.zip[/url]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…
... game use incorrect IM2 vector tables in ZX48 rom and crash if ...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…
... we can start game, fix IM2(register I) and convert snapshot ... games that need original ZX48 rom can work on +2A/+3 ...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…
... 2As/+3s include a dedicated ROM (ROM 0) which is the ... original 48K ROM. Can you do this ... +3 models contain 64kB rom. One 16kB part is ... is incompatible with original ZX48 rom. On models +2A/+ ... modified 48rom with absent IM2 table vectors in range ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... 't keep calling that particular ROM routine every 20ms. You'll ... -65280 (set I=254 in IM2 to use it) full of ... 253s, which in IM2 directs the jump to 65021 ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... 't keep calling that particular ROM routine every 20ms. You'll ... -65280 (set I=254 in IM2 to use it) full of ... 253s, which in IM2 directs the jump to 65021 ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... - so you don't need IM2. If you only have a ... still let you use most ROM routines (but not the ones ... your own interrupt routine under IM2, or if you disable interrupts ... them, and never call any ROM routines, there's nothing stopping ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... ROM routines after loading..... I use the top of RAM for IM2 ...How to safely maximise available memoryHi All, I'm toying with an idea that will require I have as much memory available as possible. I'm a little embarrassed I have to ask this tbh. As…
... ROM routines after loading..... I use the top of RAM for IM2 ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... tables, no hassle, safe im2. But 48k-rom only.
(I ... Divide is safe with this im2 setup, but not enough info ...Disable interrupts?Well, I've read the bits from the David Webb book about interrupt modes and (vaguely) appreciate the principles behind having a vector table, after r…
... tables, no hassle, safe im2. But 48k-rom only.[/QUOTE]
IM2 vector can be used regardless of what ROM is currently ...
