-
SkoolKit 3.4SkoolKit - a suite of utilities for creating disassemblies of Spectrum games in HTML (and ASM) format - has reached version 3.4. Some of the new stuf…
... PUSH/POP would be useful to identify the stack area (or copy ... -
Full 16*16-digit BASIC multiplicationI liked Andre Adrian's 32-bit long multiplication routine so much that I decided to a decimal version. After all, 2^63 is only 9223372036854775808, a…
... 106E
push hl
push de
push bc
... /> ;16 bytes copy area
COPY: equ WORKSP+24 ... Z
ld de,COPY
ld bc, ... ldir
ld hl,COPY
ld de,Ba ... -
Confounded DEF FNCan anyone see why this is going wrong? I've been tinkering with it since tea time and got nowhere. [code] 2 DEF FN t$(n,t,d) =STR$ INT (n/t)…
... ;HL=$106E
push hl
push de
push bc
ld ... /> exx
ld d,0 ;copy denominator to 'D'E'
push bc
push de
ex de ... -
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…
... code)
ld a,c ; copy working value into accumulator
;; install call to .jubilee_data
push hl ; at this point, HL ... -
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…
... this byte
ldi ; copy one byte
ret po ... (past byte)
push bc ; save byte counter ... br /> ld (de),a ; copy byte
inc de ; advance ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... chance.
Next we push whatever value we want into ... this point its time to copy the value of the register ... was reliant on the odd copy of spectrum user i could ... -
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…
... ;copy attributes for graphic
ret
FetchByte:
push bc ... /> ld (hl),a ;copy attributes for graphic
push ix
pop ... -
LZ4 decoderI encountered the [URL="http://code.google.com/p/lz4/"]LZ4 compressor[/URL] a few weeks ago. Reading the [URL="http://fastcompression.blogspot.co.uk…
... br /> ;; data
push de ; save destination pointer
push hl ; save a copy
;; (does ... destination pointer
ldir ; copy bytes
pop hl ; ... -
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…
... "rolled loop" sequence of [B]PUSH[/B]es above would have ... . The best possible routine to copy from buffer to screen should ... "rolled loop" routine so [B]PUSH[/B]es are executed during ... -
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…
... the "rolled loop" [B]PUSH[/B] I listed above would ... , the "rolled loop" [B]PUSH[/B] version could be further ... are always going to copy a block of bytes ... [B]PUSH[/B]. And if your program will always copy a ... of "rolled loop" [B]PUSH[/B] during screen scan such ... -
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…
... the "rolled loop" [B]PUSH[/B] I listed above would ... , the "rolled loop" [B]PUSH[/B] version could be further ... is still preferable to PUSH though, like when you ... [B]PUSH[/B]. And if your program will always copy a ... of "rolled loop" [B]PUSH[/B] during screen scan ... -
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…
... error:
ld hl, (ch_add) ; copy address of current character
push hl ; stack HL
push af ; stack AF ... (iy + _err_nr), l ; then copy to err_nr
ld sp ... /> ld a, (hl) ; copy character at current address to ... -
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…
... + _mode) ; mode to C
push hl ; stack pointer
call ... /> k_test:
ld b, d ; copy shift byte
ld a ... /> k_decode:
ld a, e ; copy main code
k_decode_1 ... -
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…
... , hl ; switch pointers
push ix ; copy IX
pop de ; to ... 0x07f4
vr_cont_2:
push hl ; copy pointer
pop ix ; to ... ; point to next location
push hl ; copy pointer
pop ix ... -
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…
... ; unstack length
push hl ; stack start
push hl ; start
push hl ; stack new pointer
ldir ; copy the new ...
sa_contrl:
push hl ; stack pointer
push ix ; stack base ... -
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…
... /> LDIR
;proper copy routine
LD IX,49152 ... /> PUSH BC
PUSH DE
PUSH HL
EXX
PUSH BC
PUSH ... [/B] tstates for a byte copy, easily beating LDI. The routine ... -
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…
... /> fce ; stack
push de ; stack both
push hl ; pointers
exx ; alternate register set
push hl ; stack HL'
exx ... /> org 0x2e1e
pf_save:
push de ; copy
exx ; DE
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…
... 0x253b
s_scrn_str_s_2:
push bc ; stack count
... s_scrn_lp:
push bc ; stack count
push de ; stack ... hl ; unstack pointer
push de ; stack start of ... to line
ldir ; copy it
ex de, ...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…
... 0x270d
s_push_po:
push bc ; stack priority and ... 0x274c
s_stk_lst:
push de ; stack last values< ... 0x2773
s_tighter:
push de ; stack last values< ...
s_next:
push bc ; stack present values< ...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…
...
l_numeric:
push hl ; stack destination pointer
push de ; stack pointer to ... so
ldir ; else copy to workspace
push bc ; stack length of ...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…
... push bc ; to BC
inc bc ; increment length
lddr ; copy ... discriminator byte
push bc ; stack parameter< ... increment counter
push hl ; re-stack counter ... br /> push bc ; stack counter
push hl ; ...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…
... for space
ldir ; copy five bytes
ret ; ... stack
ldir ; copy literals
ex (sp ... ; five bytes
ldir ; copy
ex de, hl ; ... stack
push hl ; routine address
push bc ; stack ...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…
... restack
push de ; stack paramters
push bc ; ... ; get parameters
push de ; stack start address ... /> push de ; stack it
ldir ; copy the ... alternate register set
push hl ; stack literal pointer ...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…
[QUOTE=Zup;730789]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 BASIC (without breaking the program if it does not exist)?[/QUOTE]
...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…
... LDI is still preferable to PUSH though, like when you're ... would be more efficient to copy a few bitmap bytes together ... if you really need to copy each attribute immediately after each ... above could be optimized to copy pairs backwards, as follows:
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…
... made some error in the copy routine that I published earlier ... kB
[CODE] ;proper copy routine
LD IX,49152 ... /> PUSH BC
PUSH DE
PUSH HL
EXX
PUSH BC
PUSH ...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…
... part.
[CODE] ;proper copy routine
LD IX,49152 ... /> PUSH BC
PUSH DE
PUSH HL
EXX
PUSH BC
PUSH ...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…
... org 0x1d34
f_l_and_s:
push hl ; stack pointer
fwait ... of limit
ldir ; copy bytes
ld hl, ( ... br /> ld a, (hl) ; copy to A
and %11000000 ... number
push bc ; stack it
push hl ; stack ...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…
... variable type to A
push af ; stack it
... ld hl, in_var_1 ; stack
push hl ; return address
bit ... not
call ed_copy ; copy input to display
ld ... 16 ; reduce range
push af ; stack color item
