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Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... equ $ + 1
ld sp,0 ; unwind stack if necessary
ld b,0 ; initialize counter (7T)
. ... br /> ld a,16 ; prepare delay loop (7T)
dec a ... -
Barn find #4I think this is some sort of backup device. Its got "007" on the motherboard and the mice have chewed the buttons. Will do a little research later in…
... circuit to postpone transition from 0 to 1 - it has a ... it looks like R2-C2 delay makes NMI signal short
soundfx with BEEP or assemblyhas anyone got any soundfx they have made with BEEP this one does a fart noise BEEP 0.003,5 BEEP 0.003,7 BEEP 0.003,9 BEEP 0.003,7 BEEP 0.003,5 BEE…
...
10 BEEP 0.106132125,11
20 BEEP ... 0.106132125,16
240 BEEP 0.106132125,17
250 BEEP 0.106132125,17 ...
260 BEEP 0. ... 106132125,18
270 BEEP 0 ...The official Doctor Who threadOH MY GOD! I did [b]NOT[/b] see that coming at the end of the episode!
... .5625,-1.779694&spn=0.000907,0.002092&sll=52 ... .327815&sspn=7.223286,17.138672&radius=15000& ... &cbp=12,141.12,,0,-25.58[/url]
Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... /> ld a,16 ; prepare delay loop (7T)
dec a ... (12T/7T)
bit 0,a ; look at BREAK/SPACE ... A=0xFF on high edge, 0 on low edge (4T)
0 and 1 pulse and thus ...MC LPRINT 23681Having problems with this routine to print large on the screen using LPRINT, it works ok in BASIC, but cant seem to get it to loop for some reason in…
... the gaps. Note that the $17 TAB print control needs two ... CHR$ 23;CHR$ 10;CHR$ 0;"hello").
[code]BIGMESS:ld ... bc,$4800 ;B=72,C=0
LOOP1: push bc
ret
MESSAGE:defb $17,$0a,$00
defm "GAME ...Problem With POINT StatementHello everyone this is my first ever post, So firstly i'd like to say hello to everyone and secondly thank you to the admins for such a great site, …
... +CHR$ INT (RND*8)+CHR$ 17+CHR$ INT (RND*8)+CHR ... : GO SUB 999: PAUSE 0: PRINT AT 4,0,,,,,,: RETURN
PRINT AT 4,0;"Start : ";st:
RETURN
PRINT AT 5,0;"Finish : ";ft'"Duration : ";INT ((ft ...GAC Tutorial Started!Hi all. I have a Youtube channel where I play old games and such. I also do a few programming tutorials. I have recently added a Graphic Adventure Cr…
... br /> score 16
about 17
light 18 switch 18 ... ((VERB 12) and (no1 > 0) and (no1 < 10) and ... ((verb 19) and (no1 > 0) and (no1 < 100)) mess ... ((verb 20) and (no1 > 0) ) mess 138 wait end
IF (VERB 17) mess 201 wait end
Copying data between memory banks in USR0 modeI am experimenting with Funky Fungus to load the majority of its data (levels, screens, music etc.) into memory banks 1, 3, 4, 6 and (partly) 7 by sw…
... etc. ...]
100 OUT 32765,17: LOAD "level1" CODE
0.
[U]To Crisis ... BASIC but not in USR 0 mode - I already tested it ...Experimenting with turboloadersHello, My first post, having lurked here for a while. I'm a lifelong computer nerd, Spectrum fan since childhood in the eighties, and have recently…
... contended. Expect an extra delay of 0-7 T-states for each ... all tape loaders), the contention delay is unpredictable. You won't ...I have done a Spectrum Screen Design Template As PDFI use this for my games, to work out attribute and screen addresses. It is A4, to be printed landscape [url="http://www.peargames.co.uk/downloads/s…
... 6 7
0 16384 16640 16896 17152 17408 ... 17664 17920 18176 22528 0
1 16416 16672 ... 22272 23040 16
17 20512 20768 21024 21280 21536 ... 4400 $4500 $4600 $4700 $5800 0
1 $4020 $4120 $ ... X-ordinate in characters (0-31) to each address ...I have done a Spectrum Screen Design Template As PDFI use this for my games, to work out attribute and screen addresses. It is A4, to be printed landscape [url="http://www.peargames.co.uk/downloads/s…
... 7 Address Row
0 0 16384 16640 16896 17152 ... +512b 16
17 136 20512 20768 21024 21280 ... 21536 21792 22048 22304 23072 17
18 144 ... 5700 $5A00 +$0200 16
17 136 $5020 (+4K) $5120 ... $5620 $5720 $5A20 (+512b) 17
18 144 $5040 $5140 ...What would be the simplest tape loading routine?I'm searching for some small assembly snippet I can use to load a (headerless or not) block from tape into RAM I can embed in my C games to load furt…
... the carry flag for a '0' and
setting it ... before
05E9 LD-DELAY DEC A entering the sampling ... .
JR NZ,05E9,LD-DELAY
AND A
...display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... : GO SUB 5
17 LET y=x1+yo: GO ... poke
121 PAPER 0: BORDER 0: INK 6: CLS :
LET b=0: LET c=b: LET hl ... =t0:
PRINT AT 4,0;"Start : ";st: RETURN
... =t0:
PRINT AT 5,0;"Finish : ";ft'"Duration : ";INT ...display file addressing; screen slicingWhile working on this Compendium I'm updating or rewriting a lot of stuff. One thing I eventually came to appreciate was the simple & clever way in w…
... GO SUB 5
17 LET y=yo-x1: ... start
121 PAPER 0: BORDER 0: INK 6: CLS ... :
LET e=0: LET b=0: LET c=b: ... st=t0: PRINT AT 4,0;"Start : ";st: RETURN
0;"Finish : ";ft'
"Duration ...How much does Bifrost improve graphics (test 192x192 graphics)Inspired by the BIFROST library I made several experiments with 8x1 graphics at 192x192 resolution. The results are now overwhelming but under certai…
... /> ; 16000T
PUSH DE ; columns 0 and 1
; 16016T
PUSH DE ; columns 16 and 17
; 16103T
PUSH DE ...Completely free games?Hi, I would like to know if there are any open source or completely free games for ZX Spectrum. Or at least some other free programs without any lin…
... 80's ( those 15, 16, 17 and 18 year old's ... ] instead of [B]LD A,0[/B] by myself, or if ...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…
... /> ret nz ; return if delay not finished
ld a ... 0x0360
k_digit:
cp '0' ; digit, return, space, shift, ... shift?
ld hl, kt_ctrl - '0' ; set control table
jr ... br /> ld hl, kt_numsym - '0' ; else use symbol table
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…
... fetch parameter
ld bc, 17 ; 17 bytes for SAVE
and ... br /> ld (ix + 0), 0 ; set type 0
scf ; set ... pointer
ld bc, 17 ; header length
add ... base address
ld de, 17 ; load header
scf ...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…
... header
ld de, 17 ; SAVE 17 bytes
call sa_bytes ; send ... /> ld b, 50 ; one second delay (@ 50Hz)
pop ix ; unstack ...
djnz sa_1_sec ; jump until delay is complete
ld a ...IF EXIST?In MS-DOS scripting, there is an IF EXIST command that lets you check wether a file exists in disk or not. There are any way to check it out from BA…
... Buffer format:
Entry 0
Entry 1
Entry ... bytes long):
Bytes 0...7 - Filename (ASCII) left justified ... /> C = Filter
bit 0 = include system files (is set ... )
bits 1...7 = 0 (reserved)
DE = Address ...Copy 4Kb in Assembly?Here's an interesting problem: what's the best way to copy a block of 4Kb in assembly? The most obvious solution is to use [B]LDIR[/B]: [CODE] l…
... : ld sp, 0 ; 10t
ret ; 10t => (17)+20+6 + (11 ...
