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Text scroller and custom fontYesterday I was testing this text scroll routine taken from Jonathan Cauldwell's Intro Maker (labels have been inserted to allow partial code relocab…
... on the start of the font
LD D,A ; this ... 248 ; get rid of the bottom 3 bits as the font will ... 8
LD DE,(23606) ; get font address ( don't forget its minus ... ,DE ; HL now address of the character in the font
EX ... -
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…
... /> ; character map in FONT
push hl ; save font address
; ... base screen address
ld a,(row) ; get the ... />
ld a,(col) ; get the column
rra ; divide ... /> ld a,(hl) ; get byte of font
rrca ; shift ... -
Get starting address of gameHi, Anyone know how to get the starting address of a game? I've looked at the TZX format and couldn't see anything obvious. I'd like to load the…
... /> Anyone know how to get the starting address of a game? I ... -
Changing the font in z88dkEither I've got this backwards or the documentation is incorrect... :smile: "[URL="http://www.z88dk.org/wiki/doku.php?id=platform:zx"]The standard Z…
... to set the 32 column font you need to send data ... the high byte of the font address.
Well, I've ... -
Jetpac questionHi all, I just bought a copy of Jetpac off of Ebay and I'm having problems. To start, I'm trying to play it on an issue 2 Speccy with Interface 1, 2 …
... RandomFill1
PUSH HL ; Get random values into DE whilst ...
PUSH HL ; Get random values into DE whilst ... version - no selectable screen address or font address
; Does not ... /> LD DE,$3C00 ;Get base address of character set
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... /> c_print:
ld bc, (chars) ; font address
ld h, 0 ; set ...
ld hl, (df_cc) ; get display file address
push de ; store ... -store
pop de ; get character address
ex de, hl ; store ...'Hello World' in ASM ?Can someone show how to make the classic 'Hello World' print with ASM code ? I cant figure at this moment how to insert and handle strings with the s…
... /> jp $
;get screen address for given coords
;input ... =X
;output: HL=screen address
getScrAddr
... br /> ;input: HL=screen address, DE=string address
printStr< ... /> ld bc,15360 ;ROM font
add hl,bc
LCD interfacingHas anybody interfaced [url=http://mdfs.net/Info/Comp/LCD]an LCD[/url] to a Spectrum? I'm toying with putting together an interface, a small 32x8 dis…
... ; read busy flag (and address)
RDDATA EQU C3h ; ... br /> LD A,#80h ; address set to 00
... /> OUT (WRINST),A ; address out to display
LD ... IN A,(RDBUSY) ; get status (& address)
BIT 7,A ... I/F, 2 lines, 5x7 font.
DB 08h ; ...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…
... /> ; character map in FONT
push hl ; save font address
... base screen address
ld a, (row) ; get the ... ld a, (de) ; get byte of font
and %00001111 ; mask ... ld a, (de) ; get byte of font
and %00001111 ; ...GUI/OS for the Spectrum?Hi, Is anybody working on a WIMP/GUI system for the Spec? Is there anything current out there? [url]http://snakeoillabs.com/wordpress/2005/10/30/8…
... /> ; character map in FONT
push hl ; save font address
... base screen address
ld a, (row) ; get the ... ld a, (hl) ; get byte of font
and %00001111 ; mask ... ld a, (de) ; get byte of font
and %00001111 ; ...Using the ROMs PRINT routineI really am starting from scratch again it seems, but how do you utilize the ROM routine to print characters, I think you point te BC register to an …
... string & boldens the ROM font as it goes, might be ... instead of a full new font.
Any improvements? Shorter ... graphic
pop de ;get screen address
call p_char
inc ... /> ;
string defb 'THE ROM FONT ISN',39,'T SOOO BA ...Machine Code Routine of the weekHow about a thread that has a routine each week that is in [B]assembly language[/B] and is also described in great detail what the hell is going on …
... br /> CHARS defw address ; Get start of font
LD H ... br /> PRCHAR LD H,?? ; font address at address ??*2048
LD L,A ... ---------------------
PRCHAR LD H,?? ; font address at address ??*2048+1024
LD L ...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…
... flag', 'Tab position', and 'font address' - so that other fonts ... ;
POP HL ; Get address of 2nd byte of output ... pointing at the screen address
ld de, ... pointing at the screen address
ld de, ...UDG in AssemblyHello there my fellow WoS'ers I am currently having a play with z88dk and PASMO and would like to have some fun with some UDG's so is there a tutor…
... font.
The first thing the function does is get the address ... DE onto HL to get the address of your graphic ...
char_rows ;character row address table
defw 16384, 16416 ...
attr_rows ;attribute row address table
defw 22528, 22560 ...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…
...
ld hl, 0x3e08 ; address 'A' in font
ld c, 168 ... so
rst get_char ; else get character
cp ctrl_enter ; carriage ... HL
call line_addr ; get line address
ret z ; return if ...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…
... call line_addr ; get line address
jp ... pop hl ; restore font address *
ld (attr_t ...Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
...
ld de,#4000 ;screen address (D must be #40, #48 ... /> ld bc,#3C00 ;BC=ROM font address
ld l,a
add hl,bc ;HL=address of the source character graphics ... /> TPBLP
ld a,(hl) ;get it on the screen
Tile routinesHi all, Please does anyone have any examples of tile routines in pure asm to set up maptile screens. I would like to try and understand them and ti…
...
ld de,$4000 ;screen address (D must be #40, #48 ... /> ld bc,graphic ;BC=ROM font address
ld l,a
;HL=address of the source character graphics ... /> TPBLP
ld a,(hl) ;get it on the screen
UDG tricks?I always enjoyed using [URL="http://www.worldofspectrum.org/ZXBasicManual/zxmanchap14.html"]UDGs [/URL]for the 'sprites' in my games, when I coded th…
... 256?) smaller than the actual address. eg. if your new fonts ... 32..95, but set my font address as if it went all ... /> Similarly the upper ASCII codes get re-directed to keywords, rather ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... a double height string at address (HL) from attr and
Get ATTR Address from screen address
AND $F8 ...Double height text...<p>Is here any good routines for printing a font double height?</p><p>I've concocted this ridiculous routine but I'm sure it can be done much better.…
... br /> ld a,(ix+0) ;get char number
cp ...
push de ;save screen address
call print_tall_char
... pop de ;screen address
inc ix ;next ... ld bc,15360 ;ROM font, insert your own font address here
add ...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…
... /> _con_putcharxy::
pop hl ; get return address
pop bc ; c=x ...
[/code]
6x6 font def:
[code]
;; font6x6.s
;; system font 6x6
;;
;; note: first ...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…
... />
2) Char start is font address + (N-32)*5.
get it to byte boundary (bit ...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…
... x position
pop de ; get string address
inc de ; next ... gfx
push de ; save font address (width)
inc de ; move ...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…
... /> ld bc,FONT_ADDR-224 ;add font address - correct for missing sbc a ... the font so we can add hl,bc for screen address
ld a,(AT_IROW) ; get the screen page row
ld a,(AT_COL) ; get the column
rra ; least ...Thinking in Assembly (first efforts)The following is one small routine to educate myself on a few concepts (jumps, flow control, routines, CPI): [code]searchmem xor a …
... hl, 0 ; start searching at address 0
search: cpi ; a ... ]
found: dec hl ; get found address
push hl
pop ... bc ; retrieve address
ret
[/code]I ...merging bytesPicturing three bytes with their bits identified by letters to make the visualisation easier, what's the best way to perform this transformation? [co…
... 'm calling PIXEL_ADD to get the address of Byte 1 in HL ...Problem with BC corrupting after DJNZJust for fun, I'm messing around trying to get the level maps from Lemmings to display on the screen with machine code. It's been ages since I did an…
... messing around trying to get the level maps from ... 32 to the map address to get to the next line ... ; ADD 256 TO SCREEN ADDRESS TO GET TO NEXT LINE
... 32 TO THE MAP ADDRESS TO GET TO THE NEXT LINE ... work out how to get the address of the next character ...
