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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…
... C to A
xor %00000011 ; blue/yellow border ... store carry flag
xor l ; match for first ... get original byte
xor l ; match for new byte ... ) ; 0x7ffe
rra ; shift the byte
ret nc ... reset on BREAK
xor c ; test against
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…
... /> cp 40 ; check for shift + alphanum
ret z ... ':' ; jump if digit, return, shift
jr c, k_digit ; ... for shift
ret nz ; return if not
xor % ... 0' ; digit, return, space, shift, alt?
ret c ; return ...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…
... ; store L
srl l ; shift right logical
srl l ... ; 10 t-state jump
xor %00010000 ; toggle bit 4
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…
... 164 ; timing constant
xor %00001111 ; switch MIC on/off ... get current parity
xor h ; include current byte
xor l ; match for first ... (ula) ; 0x7ffe
rra ; shift the byte
ret nc ...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…
... ; copy to A
xor c ; ones complement if negative ... twos complement for negative
xor c ; carry always reset< ... c ; twos complement
xor c ; if negative
... set
call shift_fp ; shift bits
org ...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…
... ; alternate register set
xor a ; LD A, 0
call shift_fp ; shift addend right
pop ... rra ; test for
xor l ; left overflow
exx ... 0x30a5
go_nc_mlt:
xor a ; clear carry flag
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 ; swap pointers
xor a ; LD A, 0< ... l, b ; BC
xor a ; LD A, 0 and ... , if set, at each shift
exx ; alternate ... t_shift:
srl d ; shift DE
rr e ; ... number to DE
xor a ; LD A, 0 ...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…
... flag
adc hl, hl ; shift result left, carry to bit ... significant byte to D
xor a ; LD A, 0
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…
... 5 and 6
rrca ; shift
rrca ; right
rrca ... ; zero bytes to B
xor a ; LD A, 0
x80_fcp.lz:
xor a ; LD A, 0
xor (hl) ; carry reset if positive ...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…
... editor ; prepare line
xor a ; first pass
... return if so
xor a ; signal statement zero< ... A
rlca ; shift mask left
xor (hl) ; exclusive ... ; discard odd bits
xor (hl) ; permanent bits now ...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…
... /> pop af ; unstack type
xor (iy + _flags) ; matching
and ... ; jump with PEN
rlca ; shift
rlca ; left
rlca ... ; update mask-t
rlca ; shift mask
rlca ; left twice ...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…
... /> rra ; shift right and clear bit 7
xor b ; xor 191 - y ... 5
xor b ; xor 191 - y
rlca ; shift left
rlca ...
sra c ; shift right one bit
xor c ; combine with ...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…
...
rrca ; shift three
rrca ... OVER mask
xor c ; use ...Animated attribute revealA new challenge to solve next. I would like to create an animated attribute reveal in machine code by having my 768 byte attributes held in ram whic…
... .pdf]Table of Linear Feedback Shift Registers[/url]. There's an ... (A) & 10 (E)
xor e
and %00000001 ;mask ...reversing an LFSRWhat's the correct way of reversing an LFSR so that it produces the same numbers but in reverse order? The little BASIC program below shows a test I …
... to do is to (conceptually) shift the taps in the normal ... a bit wrong - if you shift right, you should always include ... in the taps; if you shift left, you should always include ... , right shift)
i.e. a$ = chr$(48 + xor(a$(9 ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... support" should always use XOR instead of OR, I ... where to replace OR with XOR, whenever anyone prefers this ... for "or (hl)" and "xor (hl)". The function just pokes ... can select OR mode or XOR more at runtime.
... that fzx has a 'shift' that avoids having to ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... opcodes for "or (hl)" and "xor (hl)". The function just pokes ... can select OR mode or XOR more at runtime.[/QUOTE]
shift' that avoids having to print ...Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …
... br /> 000a : af TLD_PG XOR A
000b : 21e905 ... br /> 387a : af TST_EK XOR A
387b : db5f ... cb7f BIT CB,A; Caps Shift?
38a3 : c0 ...Interface 1bis updateSupport for connecting a standard PC keyboard to the interface?s PS/2 socket, in place of a mouse, has been added. The external keyboard?s output is …
... br /> 000a : af TLD_PG XOR A
000b : 21e905 ... br /> 3874 : af TST_EK XOR A
3875 : db5f ... cb7f BIT CB,A; Caps Shift?
389d : c0 ...Problem Reading the KeyboardHi Folks, I'm working my way through Toni Baker's rather good book and thought I'd write some code to scan the keyboard and store the results so tha…
... = 8 keyboard segments, C holds XOR mast for keyboard segment numbers ... the keyboard segment number
XOR C ;Calculate the keyboard segment ... C ;Shift C left by one bit to make XOR mask for ...FZX: a new standard format and driver for proportional fonts[B]FZX[/B] is a very compact and efficient (although extremely flexible and powerful) standard format to create new fonts for the ZX-Spectrum. It sup…
... ]added print modes[/B] (OR, XOR, CLEAR and INVERT)
shift.
* [B]asm_fzx_glyph_width[/B ... ..2 fzx_draw function (the OR/XOR/CLEAR/INVERT draw functions)
Multiplying. Again.Is there a faster way of hl=a*32 than doing add hl,hl 6 times?<div><br></div><div>I get the feeling that working with 8 bit registers for most of it …
... by 32 means you bit shift the value left 5 times ... by 256), then you can shift it right 3 times for ... />
ld h,a
xor a
REPT 3
40 Column Printing RoutineI've written a 40 column printing routine, which I'd like to share... It's my first piece of 'public' code so go easy on me! I don't think it is a…
... jr pc_main
no_clip:
xor a
pc_main:
ex ... 0x07 ; get bottom 3 bits (shift right)
;; at this ... scf ; carry
rr d ; shift mask
rr e ; and ...
jr nz,pch_shift ; shift on
pch_sh_done:
...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…
... you can enter editable text. (shift+0 or PC backspace to ... /> fzx printing can be or, xor or erase modes and pixel ...LgK image compressorOk people, i decided to make it proper thread since i've finally got something tested & useful for everyone. Here is my "chunky" ZX image compressor …
... applies one of several useful xor-filters (not like joefish's ... one-directional 1-2 pixels shift then xor or with any already ...I don't think I'm getting the $22AA Pixel-Add rom routineDear all, I'm misunderstanding how the PIXEL-ADD rom routine works. My code... [code]ld b,175 ld c,1 call $22AA ld (hl),a ret[/code] So…
... /> So you'd need to shift your pixel-pattern right by ... ; most often using OR or XOR.Function with push and popIm trying to see if I understand push and pop when it comes to using to pass parameters to functions: [code] LD HL,16384 LD A,5 Push AF Ld A…
... coordinate. If you need to shift right 3 pixels, eg, you ... .
[code]
; h = shift table
; de = sprite def ...Bored of the Rings coded messageI was browsing [url="https://tcrf.net/"]The Cutting Room Floor[/url] recently and stumbled upon the entry for [url="https://tcrf.net/Bored_of_the_Rin…
...
[*]negate bytes
[*]XOR n
[*]XOR n + ADD m
[*]ADD n + XOR m
[*]bit shift
[*]uuencode!
[/list ...
