-
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…
... a 256 byte boundary
adc h ; A = H + carry flag
ld h, a ... up screen address from the table
ld a, (hl)
... up screen address from the table
ld a, (hl)
... up screen address from the table
ld a, (hl)
... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero E ... /> ld de, (cursor_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
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 de, (scr_out_row)
ld h, tbl_rows/256 ; address of the screen rows table page ... font
ld h, 0
ld d, FONTBASE/256
ld e, h ; zero ... /> ld (cursor_visible), a
ld h, tbl_rows/256 ; address of the screen rows table page ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... y
ld h,$taby1/256
ld d,$tabx1/256
ld a,(de)
inc h
ld h,(hl)
ld l,a
ld a,(de ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... ld l,b ;cord y
7 ld h,$taby1/256
7 ld d ... ,$tabx1/256
7 ld a,(de ... ld l,b ;cord y
7 ld h,$taby1/256
7 ld b ... ,$tabx1/256
7 ld a,(bc ... -
line routineWondered if anyone can help me out. I have been programming a 3d graphics library for the spectrum, in Machine code. The line routine that I have i…
... ,lp_mpt1
inc h
lp_mpt2 ld a,l
... inc h
ld de,#4000
ld b,#c0
lp_mpt3 ld (hl ... br /> inc h
ld (hl),d
dec h
inc ... -
An MC question (sorry, there's no MC forum to post to!)Ok, still struggling with learning MC - but am getting there. I just can't find anywhere on the web / in books that explains how to do arrays in MC.…
... /> add a,MyArray%256
ld l,a
ld a,0
adc a,MyArray/256
ld h ... ,a
ld a,(hl)
; time = 14 cycles
ld h,MyArray/256
ld a,(hl)
Pixel setting / general speccy codingi just started doing some cross-coding with the [url="http://www.bigfatpanda.fsnet.co.uk/z80.html"]Z80 SNA assembler[/url] and an emulator, and this …
... can put lineptrs on a 256-byte boundary and rearrange it ... into 256 low bytes followed by 256 high bytes. This ... /> ld h,lineptrs / 256
ld l,d
ld c,(hl)
inc h
ld ...Shoot-em-up Development UpdateHi Folks, I am still working away at my horizontal scroller. Here is a link to let you see progress. I have re-written the scrolling routine to make…
... New]RENDER2 EXX: LD H,TILEMAP/256: EXX
LD IXH,SCROLL_HEIGHT[/FONT ... AND %10111111: LD H,A
LD SP,HL
LD H,D: LD L,E ...In Machine Code, what is the quickest way to sort bytes?I am playing around with some ordering of sprites, where I want to order them by vertical position. I used some Rodnay Zaks code to order some bytes…
... reserve one N-byte long, 256-byte aligned "page", fill it ... place, like:
ld h,PAGE/256
ld l,a ; A = byte ...
ld (hl),a
Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... h ; 4
jr nz,wait1 ; 12/7 20/15
ld h ... ,base/256 ; 7
ld l,(hl) ; 7
inc h ; 4 ...Delay routineAs some people are aware, I have recently starting writing a [url=http://fuse-emulator.svn.sourceforge.net/viewvc/fuse-emulator/trunk/fusetest/]autom…
... h ; 4
jr nz,wait1 ; 12/7 20/15
ld h ... ,base/256 ; 7
ld l,(hl) ; 7
inc h ; 4 ...PLOT and DRAW in machine codeHow do you go about it? If I posted a really simple BASIC instruction could someone do a machine code routine so I could learn from it? I wouldnt k…
... [code]
ld hl,10000
ld de,9000
ld bc,8000 ... 'ld hl,10000' is equivalent to two 8-bit loads: 'ld h,10000/256 ... ' and 'ld l,10000-(10000/256)*256' but is done ... bit load equivalents were 'ld h,$27' and 'ld l,$10'. This ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... :
[CODE] ld a, (_r)
ld h, 9
call __MUL8_FAST ...
ld hl, _c
256
ld l, a
ld h, 65283/256
ld (hl), 255 ...A new multicolor engine called BIFROST*I'm glad to announce the release of a new multicolor engine implemented by yours truly, including high quality 16x16 tiles designed by R-Tape: [IMG]…
... :
[CODE] ld a, (_r)
ld h, 9
call __MUL8_FAST ... a, 65283%256
ld l, a
ld h, 65283/256
ld (hl), 255 ... guess :?:
ld h, 65283/256
adc a, 0
ld h, a
Multicolour demo using z88dk + BIFROST* (+source)This is just a demo to show how to show multicolour using z88dk, using the BIFROST* engine (more info [URL="http://www.worldofspectrum.org/forums/sho…
... br /> #asm
ld e,l ; tile
ld l,6 ; instead ... of: ld hl,6
256
ld l,a
ld h,_BIFROST_tilemap/256
ld (hl ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... ,(spr_num) ;l=(spr_num)
ld h,linkbuf/256
lp_out
dec ... new sprites
ld hl,(spr_num)
ld h,linkbuf ;end of ... list = free blocks
ld b, ... of new space
ld d,spr_buf/256
;... put ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... is a divisor of 256 (for instance 4 bytes ... br />
[CODE] ld h, BUFFER/256
ld a, (head_1+1) ; start ...
loop:
ld l, a
... ; do ... not a divisor of 256. I will leave that ...Creating a linked list in Z80[FONT=Calibri][SIZE=3]I am using a circular buffer to store tiles to be displayed on the screen. Tiles only appear for a set period of time, so when …
... skip1
ld a, TAIL ; if reached position 256, restart at ... skip2
ld a, TAIL ; if reached position 256, restart at ... :
[CODE] ld h, BUFFER/256
ld a, (head_1+1) ; start ...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 USEMIRRORTABLE
ALIGN 256
tbl_mirror db #00, #80 ... , reg
ld h, tbl_mirror/256
ld l, bytetomirror
ld reg, (hl)
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…
... count
ld d, line_data00/256
ld a, (hl)
ld e, a ... )
inc l
ld h, (hl)
ld l, a
push ...
ld a, (de)
ld h, line_data00/256
ld l, a
ld c ...
