Search found 148 matches

by highwayman
Sat Aug 06, 2011 9:00 pm
Forum: AY sound chip
Topic: AY Crudentials: 4 Bit Samples
Replies: 7
Views: 18195

use 4bits for the sample and the other 4 bits or some of them for the duration. it acts as a crude compression method, but as your only using 4bit audio there will probably be noticable savings by doing it because you will probably see regular multiples of the same nibble.. my home-made logic analys...
by highwayman
Sat Dec 04, 2010 9:28 am
Forum: Technical questions
Topic: Oric 1 Video output
Replies: 8
Views: 11954

boot screen is black&white,
type paper 4
or something like that.

not done basic in decades, but i think it's ink & paper & 0-7
by highwayman
Sat Dec 04, 2010 9:13 am
Forum: General Discussion
Topic: ORIC PSU REQUIRED!
Replies: 5
Views: 7989

if there is any power comming from the old psu,
open it up, screws on the base are usually hidden behind plastic caps that pull out if you drill or melt a hole into the center of them.

then replace the rectifier and capacitor and your good for another 25years! 8)
by highwayman
Sat Dec 04, 2010 9:04 am
Forum: Tape and floppy disk converters
Topic: In The Beginnig...
Replies: 7
Views: 14495

3" drives use a belt,
go look on Amstrad fan sites, someone found a source of new belts a while back.
by highwayman
Thu Jul 08, 2010 4:03 am
Forum: Technical questions
Topic: Turbo, Error handling and Counters during Tape Load
Replies: 3
Views: 6155

ijk's damsel in distress played some pretty severe music while it loaded.

i had a loader that scrolled the filename on the top line as it loaded.
it didnt need interupts, i just updated the line between received bytes.
by highwayman
Thu Jul 08, 2010 3:58 am
Forum: Cross development tools
Topic: Why filepack is not always the best option
Replies: 4
Views: 8530

i would prefer it to fail so i know it's corrupt.
much preferable to finding out much later.
by highwayman
Sun Jun 13, 2010 2:44 am
Forum: Games
Topic: O-Thrust
Replies: 42
Views: 40400

@Dbug You are right. It's an error. But I cannot find it, somewhere I must access zeropage 0 directly (without using a label), and searching the sourcecode for "0" is not a fun thing... If I start a new project I will take more time for planning before starting to code... load the game in MESS with...
by highwayman
Sun Jan 31, 2010 2:58 am
Forum: Games
Topic: Impossible Mission
Replies: 147
Views: 190571

could you reduce the sample-size by constructing the speech from allophone samples like an spo250/256 or votrax chip would?
by highwayman
Sun Jan 31, 2010 2:54 am
Forum: Technical questions
Topic: Printer port programming
Replies: 2
Views: 4757

i wrote a program once that could do a hires screendump to the printer by pressing the warmstart button.

was real good at taking snaps of xenon-1 etc.

i'll have to try & ocr it or maybe even re-type it! :roll:
by highwayman
Tue Dec 29, 2009 4:02 am
Forum: Hardware hacks and extensions
Topic: EEPROM (or flash) replacement for Oric-1 ROM?
Replies: 13
Views: 24835

also more expensive than ferro-ram.

if you want to try a 29f256 then look for very old motherboards.
some used the dip version for the bios.

also old modems, but it's hard to check if they have the right part till you buy them.
by highwayman
Sun Aug 02, 2009 4:22 am
Forum: Emulators
Topic: Mac emulators
Replies: 12
Views: 13737

make sure you have all the SDL lib's installed,

and maybe try SDLmess
by highwayman
Wed Jul 22, 2009 4:34 am
Forum: Games
Topic: Doing 3D games on the Oric ?
Replies: 434
Views: 326593

why couldnt they just have used an 8910!
:)
by highwayman
Tue Jul 21, 2009 4:28 am
Forum: Hardware hacks and extensions
Topic: Overlay RAM
Replies: 15
Views: 16728

it may be possible without any extra chips,
but you need to know the state of the via outputs at reset,

also, you must write a trap handler into $FFFA-FFFF for safety before you disable the rom or an irq/nmi could crash the system.
by highwayman
Tue Jul 21, 2009 4:24 am
Forum: Hardware hacks and extensions
Topic: Flash ROM adapter?
Replies: 9
Views: 10236

plcc is no better than tsop for prototyping on stripboard.

besides, the ferro price i listed was u.k. - if you source from the u.s. then it's about £3.70
by highwayman
Fri Jul 17, 2009 11:29 pm
Forum: Hardware hacks and extensions
Topic: Flash ROM adapter?
Replies: 9
Views: 10236

flash is cheaper, but only comparing £3 to £7
and it's getting harder to find flash that is in a dip package and not just tsop.