-
InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
[quote]
On 2004-07-28 13:08, Fraser wrote:
[ ... executed; if there is a RST n on the data bus ... so it 7 for an RST instruction and the total is ... -
I need ASM for random numberI need to generate a random pair of coardinates in asm so that x=random no between 0 and 31, y=random no between 0 and 23. Any ideas on how to code …
... /> CALL _ROM_BC_TO_STACK ; Put divisor in calculator stack
LD HL, (_RANDOM_SEED ... -
The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... /> NBYTE LD A,(HL)
RST 16
LD A,255 ... on 2004-10-01 07:28 ] -
The incredible shrinking screendumpIn this topic I stated that I would be impressed if the screendump could be smaller than 37 bytes. [url="http://www.worldofspectrum.org/forums/viewt…
... nbyte ld a,(hl)
rst 16
inc d
dec hl
rst 16
ld a,b ... nbyte ld a,(hl)
rst 16
ld a,b ... nbyte ld a,(hl)
rst 16
ld a,b ... 2005-08-26 07:28 ] -
After roughly 22 years can you help?Hi, A long one this but here goes. Roughly 22 years ago (i was 14 if i remember right) i got a 48K speccy for christmas of my dad it was awesome an…
... /> RST 8
RST 16
RST 24
RST 32
RST 40
RST ... 48
RST ... interesting though RST 56 is for the Spectrum's calculator routines. This ... -
Codies help? Werewolves of LondonHi All, never one for shying away from the deep end, having only just dipped my toe in to the world of machine code I find myself trying to find out …
... all except for maybe the calculator on rare occasion, the tape ... ROM.
[/quote]
RST are fast single-byte calls ... interrupts the CPU. The RST instructions are one byte which ... on the Spectrum. RST 16 (print) and RST 48 (calculator) are useful to ... -
Has this been done before?Are there any emulators whose speed can be adjusted by the Spectrum program that the emulator itself is running? So that, say the Spectrum program ca…
OpenZXRom v2006-05-17 releasedJust knocked out a new release of OpenZXRom last night - a GPL licensed functional replacement for the original Spectrum ROM. [url]http://matt.west.…
... are of course RST-s. Load, save, graphic functions, calculator, RAM allocation ...Disassemblers and RSTsI think this is a longshot, but... is anybody aware of a disassembler that handles the Interface One RSTs? e.g. RST $10 DEFW $0020. Cheers
... br /> ;
org $f900
rst $08 ; f900 cf $0bts
l_f909: rst $10 ; f909 d7 $0bts
defw $2d28 ; f99b 28 2d ts
rst $10 ; f99d d7 $0bts ... /> defw $2d28 ; fa51 28 2d ts
rst $10 ; fa53 d7 $0bts ...Work In ProgressHi folks, Many people ask what is in the pipeline to avoid sourcing tapes/disks/carts that we've either already dumped or have as WIP. They may rem…
... 28 Video Spectrum
Wage Rate Analysis PBW
Which? Tax Calculator ...Look what I got!Look what I just got in the post: [url]http://www.alioth.net/tmp/W5100.jpg[/url] But, please... don't hold your breath :-) Coming to an edge connec…
... 've found an interesting online calculator that compares prices from some ... response.
The online calculator can be found here:
[QUOTE=Winston;223306]
On RST #8 traps (or similar), they ...PC power suppliesDoes anybody know a decent site for calculating the power requirements of a PC?. The important bit is that it must be able to work with up to date c…
... .outervision.com/psucalculatorlite.jsp"]PSU Calculator Lite[/URL].
Not tried ... ://www.tomshardware.com/forum/243648-28-power-supply"]PSU FAQ[/URL ...Need a pointer to using the spectrum calculator from MCHi all, Can anyone point me to a good resource on using the spectrum calculator stack from machine code? I need to work out the number of seconds f…
... ; stack it
RST 28h ; call the calculator
DEFB 04h ; multiply ... ,1
CALL STACK_A
RST 28H
DEFB 0FH ;DO ... out properly - I suspect the calculator memory areas are being overwritten ...Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... 0496 c5 $0bts
rst $10 ; 0497 d7 $0bts ... 70 $07ts
l_04a6: rst $18 ; 04a6 df $0bts ... ; 04b8 7e $07ts
rst $10 ; 04b9 d7 $0bts
28 2d ts
rst $18 ; 04bc df ... CODE]
rst $18 is interesting though as ...Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …
... ;16K ROM, stacks BC onto calculator
let equ 2AFFh ;16K ...MOD calculator function?How do I for example, do LET a=(MOD n,9). I can do it a long winded way using cross-addition until the answer is a single digit. So 13763 MOD 9 wou…
The calculator's n-mod-m function ... leaves two results on the calculator stack - the DIV value on ... MOD would be
RST 28H ;; FP-CALC
DEFB ...After-Christmas mapsCavelon [url="http://maps.speccy.cz/map.php?id=Cavelon"]http://maps.speccy.cz/map.php?id=Cavelon[/url] Doombase [url="http://maps.speccy.cz/map.php?…
[QUOTE=madmekon;207329]Just started working on a map on Metropolis (Power House)
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0003155[/url]
Can any one help me with the game?[/QUOTE]
Need to write a bit of info. ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... MC at start
rst #20 ; skip ,
call scanning ...
rst #20
call scanning
calculator stack, ready to be used ... the "c" is read with RST #20 and the string with ...logical operators and the calculator stackI was wondering if there was a utility which would provide the list of commands needed for the ROM calculator to evaluate a logical expression. For e…
... push hl
rst 18h ;get token at CH_ADD ... /> jr nz,Exit
rst 20h
cp ":" ;the ... numbers are now in the calculator stack.
...Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…
... see DISCTRL
10 ~ 28 19 BIT RESERVED.
29 ... see DISCTRL
9 ~ 28 20 BIT RESERVED.
29 ... see DISCTRL
10 ~ 28 19 BIT RESERVED.
29 ... pixels 1101 Width / height is 28 pixels
0110 Width ...
00 RST SPR PF0 PF1 PF2
Programming flash eprom on DIVIDE+Can you test it on DIVIDE PLUS ? [url]http://velesoft.speccy.cz/other/flasher-divide-plus.zip[/url] (This flash utility is WINSTON's flasher for dia…
... )
OUT (23),A
RST 0 ;software reset
28-31 (can destroy data of ... (demfir)/4(+divide)/6(mdos3)/28(fatware). For example is possible ...Zombie Zombie Loading SchemeA quick check of the [URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0005866"]Zombie Zombie[/URL] loader identifies it's the RAPID LOADING SYS…
... c5 $0bts
l_5d9e: rst $10 ; 5d9e d7 $0bts< ... 5da4 3e 0d $07ts
rst $10 ; 5da6 d7 $0bts ... 5dae c5 $0bts
rst $10 ; 5daf d7 $0bts< ... 5dc5 c5 $0bts
rst $10 ; 5dc6 d7 $0bts< ... l_5e82: defw $5d28 ; 5e82 28 5d ts
defw $5d5e ...This might be something new[img]http://www.711chan.org/test/src/130427925559.png[/img] Have a look at this screenshot of my emulator ZX82. Notice the copyright message? That's…
... Z80. Floating point routines, the calculator, tape routines, anything else... all ... accesses the math via the RST 28H call.
[quote ... anything that goes via the RST 10H call. With a bit ... everything printed goes via the RST 10H call.Proportional Print Routine...Hi Folks, Does anyone know of a good proportional printing routine for the ZX Spectrum? Ideally I am looking for something that prints with charact…
... ld (hl), a
rst 8
defb 4
28, $7C, $50, $00, $00, ... , $00, $10, $10, $28
defb $28, $7C, $44, $44, $ ... /> defb $82, $54, $54, $28, $28, $28, $00, $00, $03, $00, ... defb $00, $82, $54, $54, $28, $28, $00, $00, $03, $00, ...New game! Nanako in CJMC for ZX81!Yup, that's true. We've been busy in crafting a nice, small, simple library to code games in text mode (this is, standard, unexpanded) for the 16K ZX…
... on a routine to replace RST 16 to use with UDG ... length
db 249,212,28 ; RAND USR 0 (Number not ...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…
... , 16 ; 28735 62 16
RST 16 ; 28737 215
LD ... A, L ; 28741 125
RST 16 ; 28742 215
CALL ... 7341 ; 28743 205 173 28
CALL INITCHAN2 ; 28746 205 ...Move objectHi again, I am using paper colors to represent game objects. I have a "paddle" that is 4 pixels wide. I save its position as a 2 byte word in memory…
... coordinate (from 0 to 28, in your case), and ... be done with a CP 28 instruction, for example.
RST 16 ; fast call
... control code
RST 16 ; fast call
... to white\\
RST 16 ; fast call
...
