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srowe

diagnostics I get this: register.... ok vendor/dev.... 144/144 rom/xmode....error#1 ram-mode1....ok blk-protect....ok blk-disable....ok ram-mode2....ok fe3-512kb detected OK, I think this shows that the CPLD and RAM parts of the hardware are OK. The vendor/device are still bogus and the ROM mode te...

srowe

I had been running a previous version of this firmware (Ultimate), and turned on my Vic-20 today and I get no menu etc, just a BASIC prompt. That doesn't sound good. I would think that would indicate the flash is either corrupt or not working at all. I want to upgrade to 1.7 so I have to use the fl...

srowe

KingtutUK wrote: ↑Sat Dec 23, 2023 5:41 am Can you tell me where "L5" is, as I can't locate it on the diagram or the board?

It's actually L3, the writing is not too clear

Have you checked P7 for wear? I had a board with intermittent power problems, replacing the socket fixed them.

srowe

According to the schematic L4 looks to be an inductor on the supply to the cassette motor http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/vic20/251027r2.gif I don't think it's involved in the +5V supply (but L5 is). If there's a voltage drop between the PSU and the motherboard I would fi...

srowe

If this caused the bits of the first byte to be shifted one to the left (like what an ASL would do for example) it would result in the byte value being multiplied by two. Check the contents of RSSTAT ($0297) after receiving the first character, I bet you have $02 indicating a framing error. You sho...

srowe

This was a cart made and distributed in Europe by Handic, there's a picture of it at the bottom of this page

https://www.softwolves.pp.se/cbm/minaburkar/vic.en.html

srowe

I was just working with the keyboard decode tables this morning, and I was wondering about the purpose of this whole page of NOPs. And not necessarily a bug, but they’re not being very elegant about setting the decode table index, either. I've recently disassembled the VIC-1001 ROM in this area, I'...

srowe

The firmware in the VIC-20 is a remarkable feat of engineering (given the primitive development and debugging tools available at the time it was written). While compared to some other computers of the era it is relatively bug-free there are a number of issues present. BASIC VERIFY Result When the VE...

srowe

My question is, is this interrupt routine correct? Can the jump to the $EABF routine be implemented differently? That depends on what you want happen during an interrupt. The KERNAL routine is this https://eden.mose.org.uk/gitweb/?p=rom-reverse.git;a=blob;f=src/basic_kernal.asm;hb=HEAD#l10602 it's ...

srowe

A new release (1.7) with another new feature. I've added a Minipaint image slideshow viewer to the "FE3 Utilities" menu (F5). Each file is displayed in turn, key press/joystick moves to the next image. Press [STOP] to exit.

srowe

chysn wrote: ↑Tue Nov 21, 2023 9:49 am
I automate most non-coding tasks with shell scripts. For converting BASIC text to tokenized BASIC, like Mike said, use petcat.

You can also do this with cbm-shell

Code: Select all

cbm-shell "unlist example.txt example.prg" quit

srowe

Not quite the same but I found this

https://www.ebay.com/itm/314765290463

srowe

Wayne / Art Ravers wrote: ↑Wed Nov 15, 2023 2:24 pm I have already acquired a Kernal Rom Chip, just need to get a 6502 now - Any suggestions on Places that are reliable please ?

I'm pretty sure I've ordered parts from this guy

https://www.ebay.co.uk/itm/325396424917

srowe

DrVeryEvil wrote: ↑Wed Oct 25, 2023 2:38 pm A quick tip, all the data and address line are accessible from the character ROM chip.

Back in the 80's I made an internal 3K expansion module that fitted into the socket

https://www.sleepingelephant.com/ipw-we ... php?t=7016

srowe

I've updated the user guide I wrote to include all the new features

https://eden.mose.org.uk/download/FE3%2 ... 0Guide.pdf

Denial

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