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Using the stack to copy memory blocksA [b]PUSH[/b] and a [b]POP[/b] instruction together take less time than two [b]LDI[/b], so long [b]POP/PUSH[/b] sequences are sometimes used to copy …
[QUOTE=Matt_B;465610]The quickest copy would use LDI during the ... gasman) find the quickest copy is to POP from uncontended memory during ... of one screen line), then PUSH to screen memory during the ... -
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…
... ) ;store CD_ADD
push hl ;in stack, so ... /> ld hl,Expression ;And copy my expression...
ldir ... later while evaluating.
pop hl ;Recover pointer to ... -
Opinion on new 128K only gamesHello, Being new to the WOS community, I am unclear on the attitude towards 128K only software, that is; Is there a strong need to support the 48K m…
... line shell that I just copy and modify for any specific ... /> ; ------------
.slow_down:
push edx ; ***SLOW VERSION***
jne .slow_across
pop edx
add esi ... -
emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…
... a generic hardware-independant entry block. It's down to the ... long did it take to copy the 20kb video fram buffer ...
LD SP,screen_address
PUSH HL[/code][/QUOTE] -
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…
... />
.down: push edx ; Copy data
push esi
... jne .slow_across
pop edx
add esi ... [ebp+hermite_y3]
pop eax ; Count
... the limited use of 'PUSH' and 'POP' and the large ... -
Supertest 128 - Loader QuestionI wonder if someone could explain (in simple terms please) :) , the purpose of the switch code. I see what is doing (going to 48k mode via spectrum)…
... buffers]
; F. Copy 5:4000 to 7:DB00 ... dodos
;
; F. Copy 5:4000 to 7:DB00 ... ;
diewith:
push af
ld iy,DDOFF ... />
dodos: push af
push bc
ld bc ... pop bc
pop af
call pciy
push af
push ... -
Converting TRD-Dos into TapHello, there are still many programs appearing on TRD-Dos or SCL format and users of normal Spectrum cannot run them. Of course I know about emulator…
... these files together by typing "copy /b code1.tap+code2.tap ... it:
[code]PUSH HL
POP IX
LD A ... a tap file
* Type "copy /b loader.tap+all_code.tap ... the whole lot together using "copy /b basic.tap+nearly_done.tap ... -
Gigascreen - programming guideDoes anyone know of a programming guide for the 128K gigascreen screen mode, specifically a persistence colours table, some code (pref. C level or BA…
... they'll get messed...
PUSH HL ;...around with.
PUSH HL ;Copy HL (attribute address)...
POP DE ;...to DE ... .
POP HL ;Recover numbers...
POP DE ;...
POP AF ;...from ... -
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…
... run
; second block of encrypted code is loaded ... ; 5d1c c9 $0ats
push de ; 5d1d d5 $0bts
pop bc ; 5d9f c1 $0ats
pop bc ; 5db0 c1 $0ats
pop bc ; 5dc7 c1 $0ats
Push/Pop data copyingWe all know that stack pointer cheese and push/pop is faster to move data than LDIR - which in turn is slower than unrolled LDI's anyway. I rewrote …
pop reads two bytes from SP into specified register pair and increases SP by two. push decreases SP by two and stores two bytes from specified register pair to SP. These operations are not copy anything.50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... breakdown of PUSH BC is:
PUSH dd pc:5 ... on average 16T per PUSH instead of the usual ... 24T to do a contended PUSH.
Now ... front of every ordinary PUSH to extend them all ... the different block types. That means I only POP each line ...SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... Z80 routine replicates the old COPY command. You can call ... it with COPY 65446. While the original command ... required.
[code]
; COPY command for the ZX Printer ... /> push hl
push bc
call copy_line
pop bc
pop hl ...SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... 24 to 255 (including block graphics, UDGs and tokens). ... push af ;
call doit1 ;
pop af ;
pop de ;
pop ... ;
cp 144 ;+ block graphic?
jr c, blgr ... call 0x0b38 ;+PO_GR_1 constructs the block graphic
ld hl, ...SE Basic Type-ins^Pete suggested creating a sticky thread for SE Basic discussion. I thought a Type-ins thread might also be useful. Up to the mods if they want to ma…
... at 63550. Call it with COPY 63550. IM2 mode is then ... a hi-res CLS with COPY 44252.
[code]rep_j ... />
zap_loop:
push hl
push de
push bc
ld ... /> ld c,l
pop hl
push bc
ret
50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... the other thread on using PUSH to do scrolling. It's ... people were talking about using POP/PUSH to copy data, and how Joffa ... is replacing the sequences of PUSH statements in the main drawing ...Maketzx...Whats the state of play?Been out of the whole emulation bit for...a while :) But, back in the saddle, ready to transfer some more tapes.....except...maketzx doesnt seem to w…
... of saving an almost exact copy of the software... Snapshots are ... 're going to have a pop at them, then you'd ... to have a pop at Taper when a stop block would remove ... the pause from the previous block and we had to redo ...50Hurts - Full-screen 50Hz 1-pixel scrolling on a 128K Speccy50Hurts - Full-screen 50Hz 1-pixel horizontal scrolling on a 128K Speccy. Graphics are an obvious nod to Joffa, whose games and banter were a big ins…
... can only really have one block type per row. But because ... the sequence of copy statments, so it can copy from a rolling ... Speccy scroll copies sequences of PUSH statements from a map store ...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…
... and makes the linewrap CODE block 246 bytes.
Options in ... if parameter on stack
PUSH AF ; 63860 245 save flags ... ; 63891 62 255
...
POP AF ; 64083 241 get parameter ...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…
... font (which I had to copy from a text editor due ... /> do_it:
push hl
push bc
push de
push af
call doit1
pop af ...RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
...
pop af
Don't you mean push? It ... code does with AF is copy from memory to registers....not ...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…
... br /> pop af ;
pop de ;
pop bc ;
pop hl ;
cp 144 ; block graphic?
jr c, blgr ... /> call po_gr_1 ; constructs the block graphic
ld hl, ... a ;
pop bc ; restore count
push hl ; save mask ...RAND USR that doesn't work in emulators and clonesEons ago, I "discovered" a strange RANDOMIZE USR. This is it: [b]RANDOMIZE USR 46578[/b] Using it on a genuine ZX Spectrum rubber key or Plus model,…
...
pop af
Don't you mean push? It ... code does with AF is copy from memory to registers....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…
... 29825 42 165 200
PUSH HL ; 29828 229
... 29829 33 1 0
POP DE ; 29832 209
POP DE ; 29846 209
POP DE ; 29860 209
block is. The fixed addresses ...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…
... 28749 33 107 92
PUSH HL ; 28752 229
... 28753 33 0 0
POP DE ; 28756 209
POP DE ; 28769 209
... CODE]
3) Copy the string into the workspace ... 28830 33 2 0
POP DE ; 28833 209
RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... channel type 'P'
pop hl ; allocated address plus ... br />
push hl ; save AT_COL address ... ; Main loop to copy 8 font bytes into ... :
pop hl ; restore AT_COL address ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... channel type 'P'
pop hl ; allocated address plus ... br />
push hl ; save AT_COL address ... ; Main loop to copy 8 font bytes into ... :
pop hl ; restore AT_COL address ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... below BASIC area
push bc
call 0x1655 ... pop bc
ld hl, CH_DATA + 4
lddr ; copy ... DRIVER
push hl ; save AT_COL address ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... below BASIC area
push bc
call 0x1655 ... pop bc
ld hl, CH_DATA + 4
lddr ; copy ... DRIVER
push hl ; save AT_COL address ...RFC: 64 column font codeIn BASIC, type CLEAR 49999 then import the code at 50000. Then type RANDOMIZE USR 50000. This will create a new channel and attach stream #4 to it. A…
... below BASIC area
push bc
call 0x1655 ... pop bc
ld hl, CH_DATA + 4
lddr ; copy ...
DRIVER:
push hl ; save AT_COL address for ...
