-
Total amount of memory on a Speccy ?I wonder............ The C64 (excuse me for saying that name in here. I'll hereby name it just "it") has 64k, while only 38k, or so, is available f…
... itself or using routines like RST 16 from machine code), and 48K ... -
question about RST 10hhow do you set the position of the text when using 'RST 10h' to print to screen?
...
LD a,22
RST 16
LD a,10 ;x ... -coord
RST 16
LD a,20 ;y ... -coord
RST 16
LD a,65 ;character ... code to print
RST 16[/CODE]
I do ... -
IY RegisterIve got a really bizarre bug, and I have only just started using the IY register. I seem to remember reading somewhere in a programming book, to neve…
When your code uses ROM-routines (i.e. RST 16 for print)
then the real value of IY is needed for correct handling.
Best is not to use IY or only when not calling ANY ROM routines -
Poke 23739,111So, I'm looking at some of my old loaders (BASIC stuff) to work out how I got the display to not corrupt on loading code. It's the old POKE 23739,111…
... than the Speccy's normal RST 16 routine!)
My 42 ... -
Channel redirectionHi! I need help regarding the following problem. I want a BASIC decoder running on Spectrum, written in assembler. I found the great *LIST routine […
... it works only with channels (RST 16).
A sample output is ... -
Fuse 0.9.0 releasedVersion 0.9.0 of [url=http://fuse-emulator.sourceforge.net/]Fuse[/url], the Free Unix Spectrum Emulator[/url] has just been released. Highlights of t…
... ]
ORG 31000
RST 8
DEFB #31
LD (#5CED),HL
RST 8
DEFB #32
RET C
RST 16
INC HL
JR ... -
Fuse 0.9.0 releasedVersion 0.9.0 of [url=http://fuse-emulator.sourceforge.net/]Fuse[/url], the Free Unix Spectrum Emulator[/url] has just been released. Highlights of t…
... ]
ORG 31000
RST 8
DEFB #31
LD (#5CED),HL
RST 8
DEFB #32
RET C
RST 16
INC HL
JR ... -
[WANTED] ASM routinesHi there, 1.) i really need 5-6 working and well commented routines, showing assembler capabilities. They should be simple, but not too much complic…
... ,32 ;AT function code
RST 16 ;send
LD A,14 ... ;row number
RST 16
LD A,20 ;col ... number
RST 16
LD A, D ... ;char code
RST 16
RET
...
...
The official Doctor Who threadOH MY GOD! I did [b]NOT[/b] see that coming at the end of the episode!
... ,(IX) | XOR A | RET Z | RST 16 | INC IX | JR loop[/QUOTE ...Print ATHello, Can someone please tell me how to do a Print AT command? Thanks,
...
LD a,22
RST 16
LD a,10 (x ... -coord)
RST 16
LD a,20 (y ... -coord)
RST 16
LD a,65 (character ...Print ATHello, Can someone please tell me how to do a Print AT command? Thanks,
...
LD a,22
RST 16
LD a,10 (x ... -coord)
RST 16
LD a,20 (y ... -coord)
RST 16
LD a,65 (character ... code)
RST 16
[/code][/quote]You need ...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…
... 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 ...
