Search found 67 matches

by James_Parsons
Fri Jan 30, 2015 7:06 pm
Forum: Programming
Topic: Getting Microsoft BASIC source
Replies: 8
Views: 1944

Re: Getting Microsoft BASIC source

Wow, cool Benoit. The Apple II is the only apple product I like :P
by James_Parsons
Fri Jan 30, 2015 4:24 pm
Forum: General Discussions
Topic: Looking for a good instruction sheet
Replies: 5
Views: 705

Looking for a good instruction sheet

I once had a PDF that contained the entire instruction set for a Motorola 6800. It contained the opcodes, the hexadecimal representation, and the binary representation of the instruction. Now I am looking for one for a 6502, but I have not found anything like this. Does anyone have a reference like ...
by James_Parsons
Tue Jan 27, 2015 7:15 pm
Forum: Programming
Topic: Getting Microsoft BASIC source
Replies: 8
Views: 1944

Getting Microsoft BASIC source

Hi, none of ya'll probably remember me. Bu I am looking for a copy of Microsoft BASIC source code. I believe I have found it here: http://www.pagetable.com/?p=774 , but I am not too sure. Can anyone verify that this is Microsoft BASIC and not some sort of fraud?
by James_Parsons
Tue Nov 12, 2013 9:14 pm
Forum: Newbies
Topic: Useless Projects Vs. Useful Projects
Replies: 10
Views: 2058

Useless Projects Vs. Useful Projects

This may be me, but i think build a project (with an MPU) that flashes LED's is pretty useless. My reason for believing so is that this can be accomplished with a 555 timer, or some chip from radio shack. You really don't learn much assembly.
by James_Parsons
Sun Oct 27, 2013 11:09 pm
Forum: EhBASIC
Topic: Bug??
Replies: 2
Views: 2519

Re: Bug??

Nevermind the first problem IRQ_vec is defined in min_mon, however it still wont assemble it will open the assemble screen up for like a second then go down nothing happens
by James_Parsons
Sun Oct 27, 2013 11:00 pm
Forum: EhBASIC
Topic: Bug??
Replies: 2
Views: 2519

Bug??

Kowalski wont assemble min_mon.asm. It Says

Code: Select all

ERROR E021: Undefined label 'IRQ_vec'. ROW 435, FILE C:\Users\James\Desktop\ehBASIC\basic.asm
I don't know what I should change IRQ_vec to
by James_Parsons
Sun Oct 27, 2013 8:59 pm
Forum: Emulation and Simulation
Topic: Commodore 64 Emulator Images
Replies: 1
Views: 1145

Commodore 64 Emulator Images

Hello, this may be off tpic, but how do i take a binary file and convert it to a .d64 file for use with vice
by James_Parsons
Sun Oct 27, 2013 3:36 am
Forum: Newbies
Topic: Timing In Software
Replies: 9
Views: 2713

Timing In Software

Say I have a driver that needs to read form $0200 every 100ms. How exactly do i do this in assembly
by James_Parsons
Sun Oct 20, 2013 1:50 pm
Forum: Newbies
Topic: On Address Decoding
Replies: 11
Views: 3719

Re: On Address Decoding

So, Where Do The Actual Addresses Come In
by James_Parsons
Sat Oct 05, 2013 12:11 am
Forum: Newbies
Topic: Getting young people into 6502
Replies: 118
Views: 23299

Re: Getting young people into 6502

LOL: Lego, Arduino. You don't learn much from a prebuilt microcontroller using Python or C. I'm tired of people in my school calling themselves "hackers" because they know how to use command prompts and Linux. That's more noobish than me. Also since I have been with vintage computing, I noticed ...
by James_Parsons
Fri Oct 04, 2013 11:57 pm
Forum: Newbies
Topic: welcoming newcomers to the 6502 world
Replies: 25
Views: 42073

Re: welcoming newcomers to the 6502 world

All this was done cause of me :( I feel guilty now
by James_Parsons
Fri Oct 04, 2013 11:52 pm
Forum: Newbies
Topic: Stack Requirements
Replies: 4
Views: 1180

Stack Requirements

http://www.devili.iki.fi/Computers/Comm ... e_274.html

what does it mean
Stack Requirements: 13
by James_Parsons
Fri Oct 04, 2013 11:18 pm
Forum: Newbies
Topic: On Address Decoding
Replies: 11
Views: 3719

On Address Decoding

I know garth has an article on this in his 6502 primer, however to help me I would like to learn the actual mechanics/mathematics of address decoding. I suppose it wont be to different for related processors like the 8085 and 6800
by James_Parsons
Wed Sep 11, 2013 9:23 pm
Forum: Programming
Topic: Questions On The Stack
Replies: 7
Views: 1698

Questions On The Stack

When a

Code: Select all

PLY
Is executed, Is Y literally pulled for the stack, or does it just retrieve the last item on the stack and store it in Y
For Example

Code: Select all

PHY  $#01
PHA  $#02

PLY
What is in Y 1 or 2
by James_Parsons
Sun Sep 08, 2013 12:35 am
Forum: Programming
Topic: Getting Address Of Last Jump
Replies: 13
Views: 1691

Getting Address Of Last Jump

Is there a way I can use the PC or stack to find the location of the address the last

Code: Select all

JMP
or

Code: Select all

JSR
instruction that was called