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How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... /> ; if a = 0, use standard aligned routine
or a
jp ... db 0, 0, 0, 0, 0, 0, 0, 0 ; left hand side of the image
shiftdata_rbuff db 0, 0, 0, 0, 0, 0, 0, 0 ... 0
WALL EQU 1
LEVEL_EXIT EQU 2
CRATE EQU
Paradigm Shifter
July 2022
Development
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How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... 0
WALL EQU 1
LEVEL_EXIT EQU 2
CRATE EQU 3 ... -
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... /> NOPS_AT_START EQU 0
RETURN_TO_BASIC EQU 1
TIMING EQU 1
... /> ; #F7 - 1, 2, 3, 4, & 5
; #EF - 0, 9, 8 ... ; are we pressing A, S or D?
ld a, #FD ... stashed_iy dw 0
stashed_hl_alt dw 0
quitpressed db 0
... -
How to disable the "scroll?" message?Hello. I'm a beginner Z80 assembly programmer and I decided to make a ZX Spectrum game to practice my skills and gain some more experience. I curr…
... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... ink colour
or b ; OR in the ink colour ... 0
WALL EQU 1
LEVEL_EXIT EQU 2
CRATE EQU 3 ... -
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
main, mainloop, read keyboard and update player
[code]
ORG 32768
main:
IF NOPS_AT_START
nop
nop
nop
nop
ENDIF
IF RETURN_TO_BASIC
ld (stashed_iy), iy
... -
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... /> ld a, (line_list_end)
or a
ret z ; exit ... de) ; get operation 0 = draw in prev pos, 1 = draw previous then ... /> ; operation 0
; if line type == 1, 2 or 3, we move to ... /> ; operation 1
; if line type == 1, 2 or 3, we move to ... -
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... br /> ; #F7 - 1, 2, 3, 4, & 5
; #EF - 0, 9, 8 ... br /> ld a, (player_fire_cooldown)
or a
jr z, .abletofire ... /> ld a, d
or a
jp z, .notfiringupordown ... br /> ld a, e
or a
jr nz, .firingdiagupordown ... -
Robospec (new project, hopefully useful as a tutorial as well)Starting a new project after my graphics investigations. * It's gonna be a Robotron clone since that's not too ambitious (although I'd like to hav…
... ) ; get operation 0 = draw in prev pos, 1 = draw previous then ... /> ; operation 0
; if line type == 1, 2 or 3, we move to ... br /> ; set operation (linedata+1) to 0
; we know L ... /> ; operation 1
; if line type == 1, 2 or 3, we move to ... -
1942 isn't all that badIt isn't, you know. I played that for the first time in 15+ years earlier today and it's alright. It's got all the enemy patterns, power ups and basi…
... configured as a Sinclair stick 1 or 2. It also types the ... can even choose Kempston, Sinclair or Cursor from the menu and ... won't accept them (6-0) as valid entries. Am I ... /woodywoodster/specemu/specemu-3.2.b250622.zip"]specemu-3.2.b250622.zip ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... to parse "Hello", Gandalf as 3 tokens though - string: Hello token ... , af'
LD_SCROLL_SRC_DEST
LD_SCROLL_SRC_DEST_LINE 1
LD_SCROLL_SRC_DEST_LINE 2
LD_SCROLL_SRC_DEST_LINE ... /> ; if half-line is 0 (A=0)
or a
jr nz ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... '
LD_SCROLL_SRC_DEST
LD_SCROLL_SRC_DEST_LINE 1
LD_SCROLL_SRC_DEST_LINE 2
... in B
ld d, 3
.morebits
...
; D now has 3 - half-lines that are pressed ... ; if half-line is 0 (A=0)
or a
jr nz ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... br /> add 3 ; add on 3 for the count ... cpair_getlinkptr:
ld de, 3
add hl, de
1", 0 ; character literal not length 1
str_err_badlyformedliteral db "string or ... ***
Pass 3 complete
Errors: 0, warnings: 0, compiled: 2345 ... -
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... ld (hl), 0
ld de, BSS+1
ld ...
call cpair_setlinkptr ; (1 (2 3))
ld a, TAG_INT16< ... cpair
call cpair_setlinkptr ; (1 (2 3) 4)
ld hl, ... ld l, a
or h
ret z
or h
ret z
Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... ; cpair
call cpair_setlinkptr ; (1 (2 3))
ld a, TAG_INT16
; if half-line is 0 (A=0)
or a
jr nz ... "true", maketrueobj, 1
SYM_TBL_ENTRY "1+", add1, 0
SYM_TBL_ENTRY "1-", sub1, 0
SYM_TBL_ENTRY ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... ; cpair
call cpair_setlinkptr ; (1 (2 3))
ld a, TAG_INT16
; if half-line is 0 (A=0)
or a
jr nz ... "true", maketrueobj, 1
SYM_TBL_ENTRY "1+", add1, 0
SYM_TBL_ENTRY "1-", sub1, 0
SYM_TBL_ENTRY ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... either whitespace, null terminator, or 'U' or 'u', or parentheses, or quotes
ld ... bit
add 3 ; add on 3 for the count and ... "true", maketrueobj, 1
SYM_TBL_ENTRY "1+", add1, 0
SYM_TBL_ENTRY "1-", sub1, 0
SYM_TBL_ENTRY ...Console frameworkStill working on Specotron, but at the point where working out the diagonal lines collision is not good at beer o'clock. In the meantime I've knoc…
... either whitespace, null terminator, or 'U' or 'u', or parentheses, or quotes
ld ... bit
add 3 ; add on 3 for the count and ... "true", maketrueobj, 1
SYM_TBL_ENTRY "1+", add1, 0
SYM_TBL_ENTRY "1-", sub1, 0
SYM_TBL_ENTRY ...Physics threadProbs best to not confuse Physics with "Been to the Cinema recently"? Physic away! I'm only good at maths though, sorry.
... ratio of the successive numbers 1, 1, 2, 3, 5, 8, 13, ... the shape of the TV or monitor they watch ;)
... />
4/3 = 1.333.... not near 1.6 odd, too small ... that 1/golden ratio = 1 - golden ratio
1/golden ratio ~= 0. ...Physics threadProbs best to not confuse Physics with "Been to the Cinema recently"? Physic away! I'm only good at maths though, sorry.
... ratio of the successive numbers 1, 1, 2, 3, 5, 8, 13, ... the shape of the TV or monitor they watch ;)
... />
4/3 = 1.333.... not near 1.6 odd, too small ... that 1/golden ratio = 1 - golden ratio
1/golden ratio ~= 0. ...ZX PC Interface : The manual, schematics and more info... ZX <-> PC Interface ------------------- Contents 1) The ZX <-> PC Interface 1.1) What is it? 1.2) What does it do? 2) Install…
... the ZX Spectrum ROM or the EPROM you change ... as active file
or will open a new ... file
to load or save from (hard)disk. ... D 0
v 1 7 6 5 4 3 2 1 0 0 1 2 ... routines are calling #556 or #4C2 the results will< ...ANNOUNCE: Fuse 0.6.0.1 (security fix)Fuse 0.6.0 has been found to contain a small security hole in the TRDOS disk handling code. Due to multiple race conditions, it is (in theory) possib…
Fuse 0.6.0 has been found to ... .
Fuse 0.6.0.1 has been released, and mostly ... .org/~pak21/spectrum/fuse-0.6.0.1.tar.gz"]http://www ... .srcf.ucam.org/~pak21/spectrum/fuse-0 ... .6.0.1.tar.gz[/url]
0.6.0.1 also ...More random questionsWay back in the mists of time I remember reading a couple of articles in an ancient copy of Sinclair User, ZX Computing or the like (can't remember w…
... of Sinclair User, ZX Computing or the like (can't remember ... POKE used to transform line 1 of a Speccy BASIC program ... to line 0 so it could not be ... instead of 1, NOT PI for 0 and INT PI for 3. Can ...Entire Sinclair Software Collection For Sale - Built Up Since 1988!Sinclair Spectrum Software For Sale Information below includes the title of the software, the type of media it is supplied on and the price. I can a…
...
48K Cassette
?0.50
Ikari Warriors ... Gold ? 1986)
+3 Disk (+ 1 Audio Tape)
? ... /+2 Cassette
?0.50
Winners: ... packaging and is either Good or Excellent quality.
* ...Speccy stuff for sale - some raritiesI've just bunged a load of Speccy games on EBAY , nearly all have a start price of 75p Titles are: SHADOWFIRE (By Beyond) SOLID GOLD (US Gold)- 5 …
... /> STARSTRIKE II - (Realtime)
SUPERCHESS 3.5 - (CP)
SWEEVO'S ... is: retroid-prime
or follow this link..
0&since=-1&sort=3&rows=50 ... -prime&include=0&since=-1&sort=3&rows=50 ...InterruptsA small piece intended for the FAQ. Comments, corrections, additions welcome. Notably: * How long does the 48K ULA hold /INT low? * What happens i…
... it.
* M3: 3 tstates: write the modified value ... via the last IM 0, IM 1 or IM 2 instruction.< ... again.
* M3: 3 tstates: write the low byte ... vector.
* M5: 3 tstates: read high byte and ... acknowledge interrupt.
* M2: 3 tstates: read low byte of ...Machine Code Sprites Example Code Using Char Based SystemBelow is my WIP code to do smooth screen wrapping sprites using char positions and offsets, as opposed to writing direct to a line (0-191) and shifti…
... 3rd column if moving left or right
LD A ... /> ; 3
DEFB 0,0,0,0,0,0,0,0
DEFB 0, 0, 0, 1, 1, 1, 2, 3
DEFB 2, 3, 1, 1, 1, 0,
robpearmain
August 2004
Development
IM2 Machine Code Sprites Example Code Using Char Based SystemFurther to my earlier post, here are sprites running using char method with IM2 driving it Note, for 48k spectrum using TASM [code] ; ***********…
... 0)
; 3 = RO:YOffset (Start at 0)
; 4 = X Direction = 0, SPRLEFT or ... /> ; 3
DEFB 0,0,0,0,0,0,0,0
DEFB 0, 0, 0, 1, 1, 1, 2, 3
DEFB 2, 3, <…Smooth Color Masked Sprites using fast page flip on 48kHere is a quick demo of using char based sprites using the Page flip method: a) Background is copied to buffer b) Sprites drawn on buffer c) Buffer …
... )
;AND %01111000
;OR (3)
LD A,C
; PRINT A 1*8 CHAR TO THE SCREEN ... DEFB 255,0
DEFB 255,0
DEFB 255,0
DEFB ...Smooth Masked Sprites using fast page flip on 48k Part 2Ok, After all the suggestions in Part 1, which were all excellent (Thankyou), I opted on the following: I have 2 x 6k Offscreen areas (Yes, that's …
... ,(HL)
; AND %01111000
; OR (3)
; LD A,C
1, 18
DEFB 1, 2
DEFB 1, 2
DEFB 1 ... /> DEFB 255, 0
DEFB 255, 0
DEFB 255, 0
ORG ...
