Search found 148 matches

by highwayman
Sat Aug 04, 2012 7:10 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 66561

Re: Simplest MMC Interface hardware

make what wireless, the whole bus? :D but seriously, you cant link the oric to something that has an independant psu without isolating it. so usb for example is questionable. btw, with modern mcu's the oric could have usb(1.1) or ethernet real easy. but i'm not sure how big the software would be - i...
by highwayman
Sat Aug 04, 2012 2:45 am
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 66561

Re: Simplest MMC Interface hardware

missed a few of your questions, 32k sram is history - the microcontroller has more than that. and an absolute shitload of flash too - 128k in the one i'm looking at. no buss issues should happen, the iric is 1Mhz, the micro is 20Mhz - it can slave the buss and wait for the clocks. and as it can run ...
by highwayman
Sat Aug 04, 2012 2:18 am
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 66561

Re: Simplest MMC Interface hardware

well i had not thought of keeping the bootrom on the sd-card - interesting idea. the way the load/save works is basicaly that you request a file by name & it's returned in serial format. very similar to tape - probably because it was started on the pet/vic20 the sd2iec uses virtual folders/disks by ...
by highwayman
Fri Aug 03, 2012 9:19 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 66561

Re: Simplest MMC Interface hardware

when i say map the card into the romspace, i'm not talking about a large area, i just meant overlaying a couple of bytes - say data & status/command to an address that is normally used by the rom so it wont collide with anything else. for example, using $c000/c001 that said, maybe - just maybe, with...
by highwayman
Fri Aug 03, 2012 9:02 pm
Forum: General Discussion
Topic: www.oricgames.com
Replies: 27
Views: 20495

Re: www.oricgames.com

:lol:
i didnt know there was a Nuclear power plant simulator!!!!!
only the French would do that!
well - back then they would anyway! :x
by highwayman
Wed Aug 01, 2012 10:24 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 66561

Re: Simplest MMC Interface hardware

if you really want to do this, use the bus-port. map a new rom over the old one, with the tape routines removed & replaced with the sd ones. and you can map the sd card over one of the bytes in the rom-space. a simple gal device can do the address mapping for the sd/rom. it would cost beer-money. do...
by highwayman
Wed Aug 01, 2012 10:13 pm
Forum: 6502 assembly coding
Topic: Easy 6502
Replies: 4
Views: 10715

Re: Easy 6502

i learned using just the memory map & opcode info in the back of the oric-1 manual!!!!!
:lol:
by highwayman
Sun Jul 08, 2012 3:59 am
Forum: Hardware hacks and extensions
Topic: Oric controller for exchange
Replies: 4
Views: 7180

Re: Oric controller for exchange

i think the amscrap drives work,
but check the belt.

i saw a couple of years back on an amscrap forum that if you leave the drive unused for years the drive-belt stretches & goes into an oval shape that wont spin cleanly.

they where locating new belts btw.
by highwayman
Sun Jul 01, 2012 2:54 am
Forum: Games
Topic: Gamebase Oric V0.6
Replies: 22
Views: 19040

Re: Gamebase Oric V0.6

if your going to use a pc,
just scan and OCR the listing! :D
by highwayman
Tue May 22, 2012 7:23 am
Forum: General Discussion
Topic: EDOS machine
Replies: 6
Views: 7439

Re: EDOS machine

nintendo did this in japan with cartridges containing battery-backed ram instead of a rom,
i think they could be re-used.

you paid for the cartridge, then you plugged it in and paid for the chosen game.
by highwayman
Thu Apr 12, 2012 12:18 pm
Forum: Technical questions
Topic: Faulty orics
Replies: 13
Views: 13658

Re: Faulty orics

scope the pins on the cpu.
check the clock, rst, irq and address & data pins in that order.
by highwayman
Wed Apr 11, 2012 10:12 pm
Forum: Technical questions
Topic: Faulty orics
Replies: 13
Views: 13658

Re: Faulty orics

the crap you see before the prompt is just random data in ram.

what's wrong with the last one?
by highwayman
Wed Apr 11, 2012 8:21 am
Forum: Technical questions
Topic: Faulty orics
Replies: 13
Views: 13658

Re: Faulty orics

did you fix them yet?
:D
by highwayman
Wed Apr 11, 2012 8:21 am
Forum: Technical questions
Topic: 1st instruction on boot ?
Replies: 9
Views: 10891

Re: 1st instruction on boot ?

easy, just map it to the adreess you want and use /ROMDIS to disable the internal rom. better yet, use a ferro-ram or battery-backed ram, set it so the romdis signal and the /OE signal on the ram can be fliped on & off. then you can power your oric & do something like. for a = $c000 to $ffff x = pee...
by highwayman
Wed Mar 28, 2012 12:18 am
Forum: Technical questions
Topic: Faulty orics
Replies: 13
Views: 13658

Re: Faulty orics

just to add a bit of tech info. the oric psu is a linear type (transformer) on 50hz mains, it's output is fullwave rectified - giving you a chopped-up 100hz dc output. then it's smoothed by a cheap rubish cap. SO THAT'S YOUR 100hz SOURCE. 8) once in the oric, it goes through a 7905 regulator and ano...