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BIFROST* Advanced Programming - part 6The purpose of this demo is somewhat different from previous ones. Instead of teaching a new technique, the main goal here is to demonstrate how much…
... to RST #38 by default. It may be a good idea to disable ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... :
0 for the 128K 'ROM 0'
(i.e. the ... rather different to the 48K ROM)
R for uninitialised RAM ... 5B80 NOP
R 5B81 RST 38
[/CODE ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... /> I had meant that the ROM is paged in after the ... addresses which in the Spectrum ROM contains RST #38 instructions ? I imagine that ... of the Beta interface's ROM were delayed at all, in ... -
The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... ]I had meant that the ROM is paged in after the ... addresses which in the Spectrum ROM contains RST #38 instructions ? I imagine that ... of the Beta interface's ROM were delayed at all, in ... some internal machine cycles when ROM is replaced.
You may ... -
Rocky Gush Floppy Drive InterfaceI have a Rocky Gush Floppy Drive Interface which I would like to post the details under the Hardware section of the website. What is correct procedur…
... byte as the Spectrum ROM in this case, although ... ROM to 48 ROM), you get a RET in the RG ROM and RST $38 ... in the 48 ROM. RET is ... to the $0280 (48 ROM to RG ROM) RET (which is ... />
RG:
1FDB RST $38 ($FF)
1FDC XOR $1B ... -
How do I detect if key 'H' is pressed in machine code?How do I detect that the key has been pressed? I have been using the IN 239 command for keys 6-0, but dont know how to detech 'H'...
... I disable interrupts (di)?[/QUOTE]
Either...
[code]
rst #38
di ;because RST #38 enables interrupts
ld ... -
Faulty +3Hi all Hoping this isn't the 40077 dead on my +3 but....... [IMG]http://www.darrenwileman.co.uk/SPEC/Plus3.jpg[/IMG] Tried the following in anothe…
... of no ROM, as the CPU ends up executing RST 38 instructions, which ... />
I'd recheck the ROM socketing, and if you don ... -
ZX Dandanator! Mini - Cartridge system for SpectrumsHi All, I'd like to present a little HW I've developed during the last three months. It's aimed at providing a console-like usage experience for a…
... 34 : Bank Switch to Internal ROM & Disable further Commands
// Command ... : Generate a NMI
// Command 38 : Reserved
#define CMD_SET_RESETSLOT 39 ... -
http://zx.pk.ru RST#38 (Russian Spectrum Talks)[url="http://zx.pk.ru"]http://zx.pk.ru[/url] is a biggest Russian forum for Speccy (has 750 Registered Users & 30 000 Messages). It's live discussion…
[url="http://zx.pk.ru"]http://zx.pk.ru[/url] is a biggest Russian forum for Speccy (has 750 Registered Users & 30 000 Messages). It's live discussion about software, hardware (Russian clones), Emulation, latest releases on Speccy, and unique ... -
Tape handling on a +3I'm seeing some strange behaviour when loading a basic program from the Loader option of a +3. I'm currently using the fuse emulator (I don't have an…
... roms, and the +3e v1.38 ROM. I can't tell at ... -
Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
Set your RAMTOP as to allow enough room for IM2 vector table, AY data, AY player, IM2 routine. Set IM2 mode. IM2 rountine should RST 38 and call AY player then RET preserving the value of HL'. -
Basic and AY musicis it possible to play an ay-music in background while a basic program is running?
... IM2 mode. IM2 rountine should RST 38 and call AY player then ... -
i want to start writing my own gamesi want to start writing my own games but have no idea how. is there any downloadable dummys guides or some software that teaches u how. the only expe…
... .
(Actually it would RST 38 twice then return but that ... -
I would like to write emulatorHi guys, I'm new to this forum but I realise that you must get loads of posts from people asking "how do I write an emulator" so I'll try and be spe…
... &view=auto"]after a RST 38[B]H[/B][/url]? (Yes ... -
MEMPTR finally crackedThis post is mainly for emulator developers. As you may be well know there is a misterious internal register in Z80 CPU (MEMPTR) which value is set …
... 12 tacts (on Spectrum, when RST #38 is executing) instead of 13 ... -
The BASIC ISRFirst of all, excuse me if my blatant ignorance about this topic makes me write some nonsense :) The thing is that I'm finishing a game in mixed BAS…
... then call the BASIC interrupt (RST #38?).
I'm not sure ... -
Another TS Emu CartLooks like the one I have. [url]http://cgi.ebay.com/TC2068-Cartdrige-48K-emulator-for-Timex-Computer-2068_W0QQitemZ250133271074QQihZ015QQcategoryZ124…
... that, when pulled low, will disable *all* internal memory. There is ... to match the Spectrum's rom disable signal which can also only ... disable the 0-16k area.
< ... filled in by the Spectrum ROM on cartridge, which is good ... -
SIF interfaceNew hardware was developed for spectrum. It is dual full UART with HW flowcontrol. In addition module could be populated with ConnectOne module for W…
... and you can call standart RST$38
With this you ... -
ZX games for fixingExist any games/software which need fix any bugs ? - incorrect graphics - incorrect or bad keyboard controll - too fast games (need slow-down) - game…
... , push iy, load iy,23610 rst#38 pop then return.. useful I ... -
Playing AY sounds with BASIC.Is it possible? If so how? I've seen in one forum a while back mention of using interrupts to play but AFAIK this is machine code only. The goal of …
... with BASIC, exit with [b]RST 38[/b] instead of [b]EI ... -
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…
[QUOTE=karingal;557460]
A massive change in the value of PC could be a conditional JP or CALL being misinterpreted.[/QUOTE]
Or our old friends IM 0/IM 1 triggering an interrupt and subsequently RST #38.... -
In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... this case should it call RST $38 afterwards or something else? What ... -
In Java for ZXHi All I am glad to notify you that I have opened the sources of my J2Z80 translator (0.1 version) which allows to use Java toolchain to generate Z8…
... this case should it call RST $38 afterwards or something else? What ... -
PRINT a numerical value i.e. the scoreHow do you fo about printing a numerical value using the print routine in the ROM? For instance I have a value 0-255 and want to PRINT the result at…
... /> ld a,22 ;ROM 'at'
rst 16 ;rom routine deals with contents ... 22 is row...
rst 16 ;rom routine deals with contents of ... row is column
rst 16 ;rom routine deals with contents of ... x 100
call 6683 ;rom routine that prints the number ... -
A new site for an old projectThe 'Interface 1bis' project site has been moved to: [url]https://sites.google.com/site/interface1bis/[/url] In fact, it's not only a simple relocati…
... />
- has the usual ‘One ROM’ (48,+128,+2) – ‘Two ROMs ... brand, as it drives the ‘ROM disable’ signal not through transistors, but ... this is the (patched) ‘48k ROM’ or SE BASIC, for that ... -
Some thoughs about fast scrolling on 128 modelPlease, consider this article as technically interesting concept not a proven algorithm. ONE The fastest scrollers use long sequence of PUSH inst…
... ;$8000 would be like an RST 0 , or some. probably not ... , i.e. #ff, i.e rst #38. What will happen to your ...
