[MOD function]

Converting a program and it uses the 'mod' function. i know it is not in Atari basic and i don't know how to adapt it to Atari.

clip from program:

390 IF D >= 0 THEN
400 X = X + (D - 2 MOD 2)
410 Y = Y + (D - 1 MOD 2)
420 MAZE(X + Y * MAZEWIDTH) = 1
430 X = X + (D - 2 MOD 2)
440 Y = Y + (D - 1 MOD 2)
450 MAZE(X + Y * MAZEWIDTH) = 1

 

 

 

[An Old Man's N00b Questions]

got my original system for Christmas '78 or '79. lost that one when my younger brother ran away and sold it.

[Maximum Scanline for NTSC? (and related questions)]

192.

 

Stella programming guide

[6502 Instruction Set Guide - printed booklet]

ordered and just got it.

[Anyone else having trouble with atariwiki.org]

Thanks.

[Anyone else having trouble with atariwiki.org]

can't load atariwiki.org . all i get is this: 

[game rom identification]

 have a game pcb with out a case. does  not run. is there a way to tell what it is(or was) by the numbers on the ic?

[Wanted: ATARI ASSEMBLER CART.]

looking for the ATARI Assembler cartage. Had a couple of snipes on E-bay. hopping to find for less than $40. saw one for $80 bundled with basic, all ready have 2 basic.

[Anyone ever used my Dungeons & Dragons program in the 1980s?]

Does anyone know where the schematic for the Dragonbone could be found? just saw the post and haven't done any searches yet.

[[SOLD] 8 bit Atari 800 Carts for Sale or Trade]

darn, just saw the assembly cart.

[[SOLD] 8 bit Atari 800 Carts for Sale or Trade]

are they all sold?

[Gopher2600 - v0.26.1]

thanks. got it working. love how you can watch the program run.

[Gopher2600 - v0.26.1]

is there a special way to run Gopher2600 under windows 10. whenever i run it, a window pops up then off.

[FS: Uncommon Atari 2600 games $4 each or 3 for $10]

sent message

[[Ignore/Reposted]8 bit Atari 800 Carts for Sale or Trade]

sent a message. interested in the AtariGraphics cartridge. had trouble reading the labels on the pic(low rez) see it now on the higher rez pic.

[[Ignore/Reposted]8 bit Atari 800 Carts for Sale or Trade]

do you have the AtariGraphics cartridge RX8054. i have the lightpen but missplaced/lost cart.

[looking for the Atari Graphics cart.]

still trying to find this cart

[Atari Basic maze generator?]

here are a few i have collected and edited over the years.

mazeatari.zip

[looking for the Atari Graphics cart.]

still looking

[Military Sales of Atari at Base & Post Exchanges]

got my original 800xl from PX at Ft. Brag NC. in 83/4.

[*Atari* 8-bit sightings (movies, videos, and more)]

Knight Rider S2E12 "Soul Survivor" 31st episode. not the computer just the controller.

I had one of those portable TV/radio/cassette players.

8 in disks! That is the computer his mother bought for him.

[Blocks (Completed!) - Formerly BBlocks]

how about outlining the block and have the outline blink when you choose?

[Atarigraphics - Lightpen Doodles]

I don't have a way of using a rom on real hardware, i do have sio2usb from Atarimax but i dont think it does roms. is there an ATR of it? autorun or DOS load?

[Atarigraphics - Lightpen Doodles]

had this in the 80's early 90's. ran over light pen with desk chair. recently replaced pen cant find cartridge. posted in wanted, wondering if anyone has a cart for sale/trade?

[looking for the Atari Graphics cart.]

have light pen. had cart, cant find, moved a few times.