-
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…
... ;TEMPS is the standard ROM routine at 3405
... ; 27944 62 16
RST 16 ; 27946 215
... ; 27961 62 18
RST 16 ; 27963 215
... the ZX FP calculator
RST 40 ; 28054 239
DB $38 ; 28056 56
LD ... -
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…
... you do so that the ROM will reset them properly.[/QUOTE ... ]
#38 or 56 decimal will PUSH ... user-written program must
; disable interrupts to make use of ... -
using the ROM's FP calculatorIs it possible to use the ROM's FP calculator to evaluate any FP expression in a single sequence of commands without breaking out to stack some other…
... C
stack D
rst 28h ; a, b, c, d ... /b + c/d
DEFB $38 ; end-calc
[/CODE]
ROM's FP calculator to evaluate ... />
stack A : stack B : rst $28 : divide : end_calc
stack ... -
Internal ROM expansionHas anybody designed a multiple-ROM interface that plugs into the internal ROM socket instead of plugging onto the edge connector? It would be useful…
... second table with the appropriate ROM routine:
[CODE] org ...
jp $1d38 ; 87c9 c3 38 1d $0ats
jp $1872 ... cd 00 07 $11ts
rst $00 ; 82e3 c7 $0bts
ROM routine for the fitted Interface ... -
question re. STR$ bugCould someone point me to whereabouts in the ROM this goes wrong? [code]PRINT PAPER 5;1;STR$ 234[/code] (Only the "1" prints in cyan.) It's not the m…
This routine (48 bytes) provides a BASIC replacement for STR$ which fixes those two bugs; use "FN s$(numeric_expression)" instead of "STR$ numeric_expression". I copied the ROM's method used in CIRCLE & DRAW for checking -1 -
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... 0038h.
You can disable interrupts with the DI instruction ... handler, for example, issuing a RST 38h for IM 1 interrupts ... . With the standard non-patched ROM (48K machines), the NMI routine ... access page in their own ROM that offers a suitable NMI ... -
Simple explanation of interrupts (in the context of Z80/Speccy)I wondered if somebody on here could explain in simple terms how interrupts work on the Speccy and where interrupts are source from. Are they a natur…
... 0038h.
You can disable interrupts with the DI instruction ... handler, for example, issuing a RST 38h for IM 1 interrupts ... . With the standard non-patched ROM (48K machines), the NMI routine ... access page in their own ROM that offers a suitable NMI ... -
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…
... pages switched instead ZX rom. Also Divide PLUS support ... zx rom
..... your allram software....
For disable allram ... on divide pcb
RST 0 ;restart system
... your allram software....
For disable allram mode must be used ... -
DIVIDE PLUS - new memory mode DIVIDE128Divide PLUS contain 512kB sram + 512kB flash eprom. Memory paging in this device is enable on two different ports : 1) port #E3 is compatible with o…
... to DIVIDE128 mode with mapram (rom emulation):
... OUT (23),A ;disable interrupt,disable MB02 memory,set divide ... br /> LDIR ;copy rom image with divide system from ... 1(memory ROW1)
RST 0 ;restart system from ... -
Interface 1bisHas anyone on here got a "Interface 1bis": [URL="https://sites.google.com/site/interface1bis/"]https://sites.google.com/site/interface1bis/[/URL] I …
... RAM
BAS EQU #3F; Disable write
SHD EQU #BF ... /> OUT (ROM),A; Page out RAM
OUT (BAS),A; Disable write ...
OUT (RAM),A; Page in RAM
RST 0 ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
...
selects one of two ROM images to use. Otherwise fit ... - Reset switch. Pin 1 is /RST, pin 2 is 0V/ground ... /> J15 - CON3 - Internal speaker enable/disable. Fit jumper shunt link to ... -
Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... I peeked the IF1bis shadow rom source, and it seems it ... the 128rom0 disassembly, the rom bank switching routine (rst 28h) is hookable ... it possible to enable and disable the 'IF1bis' VRAM mapping ... ‘48k BASIC’, from its internal ROM while the joystick and mouse ... -
Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... , I peeked the IF1bis shadow rom source, and it seems it ... the 128rom0 disassembly, the rom bank switching routine (rst 28h) is hookable ... it possible to enable and disable the 'IF1bis' VRAM mapping from ... -
Basic BASIC help needed RNDHi all, I have recently re-discovered an old program I wrote in the early 90s which would do generate random lottery numbers. I know little now, an…
... 99998474 (unsurprisingly, as the ROM $25F8 S_RND function didn't ...
RNDFUN: di
rst $28 ;FP_CALC
defb $ ... defb $E4 ;recall_M4
defb $38 ;end_calc
ld b ... -
Mysterious error message ?Something just occurred to me, when I try to load certain JSW games which require 128k memory into my emulator in 48K mode I get this error message. …
...
JP 23325 ;Page in ROM 1 etc.
;
... br /> JP ONERR ;Page in ROM 1 etc.
;
... ),H
LD (IY+38),H
LD (5C0BH), ... /> LD (5C16H),HL
RST 28H
DEFW 16B0H
RST 28H
DEFW 0D6EH
So where is the random number in the Speccy ?So I am messing around with ZX Spectrum Assembler and I want a random number. I looked up previous posts and one of the links said that random number…
... modified version of ROM routine S-RND at ... RST $28 ; FPCALC
defb $04 ; multiply
defb $38 ... br /> CALL STACKBC
RST $28 ; FPCALC
... duplicate
;
defb $38 ; end-calc
;
DivIDE allram mode help neededHi guys, are there any DIVIDE wizards out there that can explain how i page in the allram and add a rom file to it i sometimes need to load spect…
... switch between two 16kB rom pages and disable or enable writing to ...
di ;always must be DIsable interrupt, else during LDIR jump ... of custom rom image to divide ram page 0
rst 0 ... ;software reset custom ZX rom
Custom Menus on the ZX Spectrum +3Today, my Friends, i have the pleasure of presenting a program i have written which gives a set of custom menus on the +3. The main features of my p…
... MUST run with the BASIC ROM, AND RAM Page 0 paged ... calculator that call the relevant ROM routine and then return the ... calculator is via the [b]RST $28[/b] call followed by ... , terminated by a [b]DEFB $38[/b], so i can't ...Need help with keyboard scanning ?After getting frustrated with learning ASM for a while I'm back into it. The little listing below is using the ROM's PRINT AT routine to draw me a sp…
... louder.
You disable interrupts (turn the phone off ... will jump to address $38 and that’s that. ... inserting the instruction JP $38 in the middle of ... on what’s in the ROM.
Finally, ... altogether (DI), let the ROM routine take care of it ...Multiface ResidentI'm thinking about adapting some existing code to be Multiface "resident"... but being perfectly honest I'm not quite sure where to start. Any top t…
... 'in a,(95)'
rst 0; and reset
[/code ... />
You might want to disable/enable interrupts as well (DI ... remember if your code uses ROM routines you'll have to ... routine or copy/modify the ROM routine into the RAM with ...this code wont give me a random starfieldim using a peice of code that ive copied from a book, ignore most of it as it is redundant. for some reason i get a strange random starfield instead …
... RST $28 ; FPCALC
defb $04 ; multiply
defb $38 ... ROM routine at $25F8
CALL STACKBC
RST ... duplicate
;
defb $38 ; end-calc
;
... "]The Complete Spectrum ROM Disassembly by Dr. ...New WoS CD-ROM Project[url="http://neuro.zensoft.net/woscd/"]http://neuro.zensoft.net/woscd/[/url] I'm about to embark on an ambitious project ... to create new up-to-dat…
... />
- WoS Basic Archive CD-ROM (1 disc) - UKP 5 inc ... ;P
1x CD-ROM incl. Games, Emulators, Remakes & ... also considering a tech CD-ROM, excluding the games, but including ...Emulators and ROM'sHi - This is my first post here, although I have been visiting WoS for ages.... I have been on quite a few multi-platform sites that offer downloads …
... good collection of emulators and ROM's that they would be ...Spectrum ROMI downloaded some text files (they are actually the spectrum ROM files but in text) which can be compiled using TASM (or soemthing). I read on WOS th…
... (they are actually the spectrum ROM files but in text) which ...ZX PC Interface : The manual, schematics and more info... ZX <-> PC Interface ------------------- Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…
... / Distribution
4.1) ROM
4.2) Interface
The ROM will do syntaxchecking for the ... from the
original ROM, which makes headerless loading still ... /> part of the ZX ROM.
RST 8 is also altered ...
