Search found 13 matches

by dracosilv
Mon Feb 29, 2016 10:05 am
Forum: Newbies
Topic: DS1077 Oscilator as CPU clock?
Replies: 4
Views: 1975

DS1077 Oscilator as CPU clock?

Could I foreseeably use a DS1077z-100 (5v compatable part) as my clock source for my CPU?

I was figuring on using an Arduino to allow switching the EconOscillator between 1mhz and 2mhz clock-output speeds

DIV1 divider set to 50, and P1 Prescaler set to /1 : (100mhz * 1/50 * 1/1)
DIV1 divider set ...
by dracosilv
Sun Nov 29, 2015 10:30 pm
Forum: Newbies
Topic: Newbie-ish ROM and RAM decoding question
Replies: 9
Views: 1504

Re: Newbie-ish ROM and RAM decoding question

A bit of clarification, It wasn't the FACT of the clock being high/low to signify the read/writes.. it was more the juggling of the r/w AND the clock being in a certain state AND the address logic, creating, well.. a logiclal nightmare in my slightly sleepy-ish brain.
by dracosilv
Sun Nov 29, 2015 11:25 am
Forum: Newbies
Topic: Newbie-ish ROM and RAM decoding question
Replies: 9
Views: 1504

Newbie-ish ROM and RAM decoding question

Okay.. on this page here: http://wilsonminesco.com/6502primer/addr_decoding.html

It shows decoding of RAM and ROM using NAND gates and inverters. I can see how to 'wire up' my lowest 32k of Static Ram, and.. I assume that if I wanted to wire up say, the next 16k of ram (8000h to BFFFh) I'd just use ...
by dracosilv
Fri Nov 27, 2015 6:47 am
Forum: General Discussions
Topic: 65-0-2 Minecraft
Replies: 45
Views: 41900

Re: 65-0-2 Minecraft

I believe one of the computer mods for minecraft emulates a 6502 processor internally.. I think its OpenComputers? I'm also a bit of a minecraft nut as well as a tinkerer of electronics.
by dracosilv
Fri Nov 27, 2015 6:28 am
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Re: Okay.. my first post (non-rant post that is)

Alright... I know I might sound/seem like a persnickety type.. but I'm up for a bit of a challenge. I did a quick side-by-side comparison of the two source codes.. and the mixed-case-ness is something i wish i could help out with. First off, what version of TASM would I need to get so i could check ...
by dracosilv
Tue Nov 24, 2015 11:10 pm
Forum: General Discussions
Topic: DEC vs DEA
Replies: 9
Views: 1872

DEC vs DEA

I noticed in my other post about starting out with SBCs; http://forum.6502.org/viewtopic.php?f=1&t=3513 ... that in the sourcecode you provide on your website for SBC-OS (which is told to be used with TASM I believe?), uses "DEC" opcodes.. yet the simulator you provide to me.. 'barfs' at "DEC" and ...
by dracosilv
Sun Nov 15, 2015 10:16 pm
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Re: Okay.. my first post (non-rant post that is)

I poked around a bit more after I made my post and realized that the code definitely wasn't 12k in size. From the code you sent to me, I found out the main part of the code ran from D000-E120h [which is just over 4k in size] The thing I'm a bit curious about right now.. is how is the terminal screen ...
by dracosilv
Sun Nov 15, 2015 6:08 am
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Re: Okay.. my first post (non-rant post that is)

Okay, I got it up and running, but am I right in saying that the code is 12k in size? Or at least it starts assembling at 0xD000h? (I was planning on having my computer use an 8K CAT28C64 EEPROM chip for ROM memory.

I also notice if I type "D000 L", the result it gives me back is:

>D000 L
D000 ...
by dracosilv
Wed Nov 11, 2015 5:39 pm
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Re: Okay.. my first post (non-rant post that is)

;
; compile the sections of the OS
;
.include basic.asm ; $BC00 Enhanced BASIC
.include basldsv.asm ; EH-BASIC load & save support

.include VIA1.asm ; VIA1 init
.include VIA2.asm ; VIA2 init
.include ACIA1.asm ; ACIA init (19200,n,8,1)

.include sbcos.asm ; $E800 OS

.include upload.asm ...
by dracosilv
Wed Nov 11, 2015 6:37 am
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Re: Okay.. my first post (non-rant post that is)

I wouldn't bother keeping the memory map like that just for the sake of playing SID sounds.

Writing a program to modify other programs so that they write to a SID in a different location would be the easy part about doing that.

Really the I/O on my device is going to be flexible (e.g. I've not ...
by dracosilv
Tue Nov 10, 2015 10:41 pm
Forum: General Discussions
Topic: Okay.. my first post (non-rant post that is)
Replies: 16
Views: 3001

Okay.. my first post (non-rant post that is)

I'm new here, and am contemplating building my own 6502 based single-board computer.

I've decided on some aspects of the design, and yet others are up in the air.

The thing I came here searching for and looking for was a small 'monitor' program or a small programming 'language' that I could stick ...
by dracosilv
Mon Nov 09, 2015 10:10 pm
Forum: General Discussions
Topic: Forum password rant (venting my frustrations in a civil way)
Replies: 8
Views: 1309

Forum password rant (venting my frustrations in a civil way)

<rant>

I know that there's a good reason for the whole 'password needs X, Y and Z in it', and yes, I know this is my first post here, so i'm just getting this off my chest before I get to the main reason I came here, but.. honestly.. the whole needing a capital letter in the password? I bet if you ...