I will probably be asking a lot of beginner related questions on this board so here goes.....

How can I load a SID tune into the memory?
1. From a monitor and
2. in Turbo assembler

Well theres one question for now...



Thanks

Strip off the psid header (the first 124 bytes) and you have a .prg file, which you load from BASIC or the monitor, ie. with

load "file",8,1

or

.l "file",08

2. in turbo assembler:

lda #$08
tax
tay
jsr $ffba
lda #nameend-name
ldx #<name
ldy#>name
jsr $ffbd
lda #$00
jsr $ffd5
rts
name .text "filename"
nameend

How can you specify a memory location to load it into. In a monitor and in Turbo Assembler again??

For example: In this tutorial I saw it says "Load your tune into $1000"

Thanks

A .prg file includes a load address, so if the tune loads to $1000, by loading it from BASIC (with ,8,1) or from the monitor, it'll end up at $1000 if that's the load address of the file, and most tunes have $1000 as the load address.

I suggest you read the documentation for your monitor.

I suggest you go to the SIDPlay home, I can't remember where and download the docs. In the header if you don't use SIDPlay to save as C64 data then you'll need to hunt around and there is an offset. Some tunes may be have PSID 1 header although most would have PSID 2 header. I suggest you get Programmers Reference Guide from http://project64.c64.org/ as it has some light Kernal ROM jump table descriptions then sit abd practise.

i've not been paying attention, has anyone mentioned yet that, if a tune isn't originally located at $1000, a forced load to that address won't automatically make it work there...?

SIDPlay Win has an option to save .SID files out without the headers too, just load 'em up and select "C64 data (*.dat)" in the "Save as" option. The file that gets saved is a PRG file (just rename it) with the correct headers.

It isn't actually very difficult to relocate a tune by hand. All you have to do is to change all absolute addresses that point to locations within the tune (code, data) itself. I've done this a couple of times, but only with JCH's player, I think (I might have done it with some DMC tune as well, but I can't really remember).

for many tunes it's easy to hand do but once anything more than the highest 4 bits of a 16 bit address needs to be changed then it gets a little harder. Worst of all is something where all 16 bits of absolute addresses need changing. That's wh you write a small 512 byte routine which checks for for absolute addressing and then checks if it's in a range to move then add/subtract. It's easier than it seems. The only hard bit then is changing internal tables for the music routine like sectors/sequence tables and more.

Yes, that's obviously harder, but how often do you need you tune to start at $33b5?

You're right TMR, I remember a Reyn tune from Dutch Breeze. I actually did it by hand and hope to never need to do that again

I use CuteFTP pro. I only have the trial version though. It's pretty good and easy to use.

Try www.download.com to get it. I think I got my copy from there.

I use LeechFTP by Jan Debis.

OT: Or you can use Internet Explorer like this:
ftp://username:password@ftp.server.com/
and just copy your files ...
_________________

I made a rough prg > sid DOS tool that only supports 1 tune though and uses PSID2 header. It can do multispeed (evenly spaced) tunes but no digi. Current, atleast old method is not nice digi handling