A very BASIC font question

[helpcomputer0]

Pardon the pun. I'm trying to load one of DamienG's fonts (https://damieng.com/typography/zx-origins/scribe/) to use in a game I'm making in BASIC but I can't get it work. I can't load it from the tape file included with each font, I'm trying to use FUSE emulator with +3.

I've seen this thread but nothing in it worked, I couldn't get it to load the font I wanted.

I used the following but just got a invalid filename error.

Code: Select all

10 CLEAR 63999
20 LOAD ""CODE 64000
30 POKE 23607,249
40 PRINT "Hello World"

I'm 100% sure I'm missing something/doing it wrong, so I need some step-by-step advice to add one of his fonts in my game.

[g0blinish]

64000/256=$FA(250)
250-1=249

so, 23607 contains (value+1)*256

example:
https://disk.yandex.ru/d/N3SGyJGytXoQzQ
font loaded at 32768(128*256), poke 23607,127 is 128-1

[helpcomputer0]

64000/256=$FA(250)
250-1=249

so, 23607 contains (value+1)*256

example:
https://disk.yandex.ru/d/N3SGyJGytXoQzQ
font loaded at 32768(128*256), poke 23607,127 is 128-1

I get the memory addresses, but perhaps I wasn't clear.

My issue is the loading of the font data from tape, I don't know what I'm doing wrong, or how to do it properly.



This is the structure of the tape, I want to load "Scribe Bol" and use it in my game. How do I do that?

[g0blinish]

try LOAD ""CODE, but ut doesn't help

[Xela]

This is the structure of the tape

Why is the file size 770 bytes? standard font size is 768 bytes. This could be the issue.

[Xela]

I checked the tape image from Damien's site and it has the correct file size at 768 bytes. What program do you use to create the tape image?

[g0blinish]

Why is the file size 770 bytes? standard font size is 768 bytes. This could be the issue.

probably 2 bytes added - type of block and checksum

where is .tap file?

[Xela]

where is .tap file?

https://damieng.com/typography/zx-origins/scribe/ - in a zip file.

[Xela]

I used the following but just got a invalid filename error.

Code: Select all

10 CLEAR 63999
20 LOAD ""CODE 64000
30 POKE 23607,249
40 PRINT "Hello World"

Try this tap file - https://dropmefiles.com/8gkbl

[Xela]

so I need some step-by-step advice to add one of his fonts in my game.

As I see it: the BASIC program is absolutely correct. Next, you need a code block with a font - its size, for a standard font - 768 bytes (maybe less if there are fewer characters, maybe more, but in general - 768 bytes) - on the Damien's site the fonts are exactly this size. Those. everything you did was correct, the file format may have changed somehow: extra bytes were added, the header was damaged... etc.

[1024MAK]

Are you sure that you are not accidentally trying to load the BASIC program as code?
Try putting the file name in the load command to prevent this.

Mark

[Xela]

accidentally trying to load the BASIC program as code?

How is it possible to load the BASIC as a code file with the LOAD "" CODE?

[AndyC]

How is it possible to load the BASIC as a code file with the LOAD "" CODE?

It's not, the loading routine will ignore BASIC programs if you tell it to load a CODE block.

More likely, because you're getting "invalid filename" and emulating a +3 is that it's trying to load from disc and "" is not valid with disk because there is no such thing as "the next file".

Try doing LOAD "t:" first to select tape loading mode, then try again.

[R-Tape]

Does it have to be on a +3 and in +3 BASIC @helpcomputer0? I think AndyC has cracked it above if so. Otherwise this works fine on a +3 in 48K mode:

10 CLEAR 63999: LOAD "Scribe Bol"CODE 64000: POKE 23607,249

Very nice font that.

[C.Born]

probably 2 bytes added - type of block and checksum

where is .tap file?

its definitly those two bytes.
i discussed that with the coders off Fuse after conducting my "knowledge" to the tzxlist routine.
I just copied the info from ZX80 zakboekje into the C file and that worked.
So
the tape index from fuse still shows the length PLUS the two 'hardware bytes' which are part off the tape'hardware' but not from the data.

[helpcomputer0]

Thanks for all the answers!

More likely, because you're getting "invalid filename" and emulating a +3 is that it's trying to load from disc and "" is not valid with disk because there is no such thing as "the next file".

I'm 99% sure it was this. I started FUSE this time without inserting the disk and it loaded from tape fine!

[helpcomputer0]

As I see it: the BASIC program is absolutely correct. Next, you need a code block with a font - its size, for a standard font - 768 bytes (maybe less if there are fewer characters, maybe more, but in general - 768 bytes) - on the Damien's site the fonts are exactly this size. Those. everything you did was correct, the file format may have changed somehow: extra bytes were added, the header was damaged... etc.

Thanks for this. I can now attempt to add to the game.

[TMD2003]

FOR THE RECORD: Fuse's tape browser always shows tape blocks to have two more bytes than they actually contain. So if it says 770 bytes, it's legit - try it on Spectaculator and it'll show as 768 bytes.

[Bedazzle]

10 CLEAR 63999: LOAD "Scribe Bol"CODE 64000: POKE 23607,249

Nice address, didn't knew that before.