-
Keyboard routinesI'll ask here first - since this must be a long-ago solved problem, and hopefully I can avoid re-inventing the wheel... I need a keyboard routine th…
... /> jr nc,nodig
sub 16
jr pr
nodig ... 32 ; SET LOWERCASE
pr RST 16
JP START
[/code ... -
Assembler snippetsI was just thinking that a thread for small but useful assembler snippets to do useful things would be cool for people learning z80 coding. Not to me…
... /> LD A,":" ; display seperator
RST 16
DEC HL ; goto seconds ... -
How does the Speccy deal with the Character Set?Hi All, Can anyone spare a little time to explain to me the basic Assembly method of how the Speccy interprets and retrieves Characters to print on …
... asm method is to use RST 16. This is the Spectrum's ... done.
ret z
rst 16 ; print the character
inc ... -
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 …
... ; end printing if so
rst 16 ; do the printing of the ... -
Getting started with asm Speccy codingSomeone on another forum I read has asked for good Speccy coding resources. I thought it would be great to link him to a simple tutorial about how to…
... control code
RST 16 ; Call the print ... Vertical position
RST 16 ; Call the print routine ... Horizontal position
RST 16 ; Call the print routine ... A character
RST 16 ; Call the print routine ... -
Getting started with asm Speccy codingSomeone on another forum I read has asked for good Speccy coding resources. I thought it would be great to link him to a simple tutorial about how to…
... control code
RST 16 ; Call the print routine ... Vertical position
RST 16 ; Call the print routine ... ; Horizontal position
RST 16 ; Call the print routine ... B] character
RST 16 ; Call the print ... -
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 …
DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…
O.K., in that case, if I wanted to display text on the screen as part of my NMI function can I use the Spectrum ROM functions to do the display (RST 16 etc) or do I need to write my own function?
Thanks
GarethDivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…
... functions to do the display (RST 16 etc) or do I need ...DivIDE QuestionHi all, I've been trying to work out how the DivIDE works and after reading and re-reading the DivIDE programming model document by Zilog I think it…
... to do the display (RST 16 etc) or do I ... are zeropage.asm (the RST 8 initial entry point), ... />
[code]
rst CALLBAS (actually, RST 16)
defw ADDRESS_TO_CALL
ret z
rst CALLBAS
defw 0x0010
Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…
You could use the rom-routine RST 16 (decimal).
The A register holds the code of the character that is to be printed.
(It's the BASIC PRINT command)Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…
... could use the rom-routine RST 16 (decimal).
The A register ...Easy way to print text in machine code?Please? It sounds so simple, but I've never done it. At the moment I'm grabbing the start address for each letter then printing them out one at a t…
... /> ret
text defb 16, 7, 17, 0 ; CHR$ codes ... 255
ret z
rst 16
jr print_text
[/code ...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 …
[code]
; PRINT AT Y,X full screen
; Y = B-reg, X = C-reg
; 0Machine 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 …
Now with saving temporary colours
[code]
; PRINT AT Y,X full screen
; Y = B-reg, X = C-reg
; 0Machine 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 …
... print to the screen via RST 16 then the characters will inherit ...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 …
... lines of code?[/QUOTE]
RST 16 also handles colour, it's ... print to the screen via RST 16 then the characters will inherit ... can alter them easily with RST 16 and the graphical codes.
'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…
... ROM-routine is done with RST 16
So Hello World ... ,(hl) fetch next character
rst 16 do the actual print
16-21'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…
'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…
... ,(hl) fetch next character
rst 16 do the actual print
ret z
rst 16
inc hl
jr ...'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…
[QUOTE=Winston;448233]
It's amazing how many ways there are to write a null-terminated string print routine :)
[/QUOTE]
[code]
xor a
or (hl)
ret z
rst 16
[/code]Howto paint a squared zone of the screen ?You know what guys ? i begin to love this languaje. Cant understand why not put more effort on the 80's to learn it :( because it is really speedy. …
... ;AT
rst 16
ld a,d ;X
rst 16
ld ... a,e ;Y
rst 16
.loop0 ... 255? then all printed
rst 16
jr .loop0
Cool BASIC tricks and tips!Following on from Dunny's excellent suggestion of a compendium of BASIC tips + tricks, I believe it would be better to have a topic dedicated to it. …
... opcode
rst 16
ld a,y-val
rst 16
ld ... a,x-val
rst 16
ld ...
