IronWorks

Here`s the fixed code so that it now runs in Felix. ? starraiders1c.o

Ah thanks for letting me know.I`ll have a look at it.

My thoughts on that would be to use the B button as a shift key. So you could double up all the buttons and the dpad.

My 10 Pence on ports for the lynx. Go 8bit with a 6502 and something with docs and source code. Say Lorenz Wiest excellent Star Raiders dissembly. The carts only 8k and pokey seems quite like the lynx sound chip. So here`s a rough hack to get something on the screen. It`s running the demo part with an invisible meteor that will explode if it hits the screen ? The stars are now sprites instead of bit maps. Radar, sights and text display is to see what it would look like. Dpad is enabled. All the projection, rotation is the original 8bit code. I really need to go back to it. starraiders1b.o

Thanks for the tips, I`ll put them in. ?

More checkerboard stuff. Thought I`d try the triangle route to see how easy that was. Using 2 single pixels of different colours stretched and tilted. The main problem I see with it is the large amount of 2 byte adds and stores for every triangle (chex2) The next attempt was to use 2 sixteen pixel bitmaps of alternating colours. This causes a slight visual bump. I think this is because the triangles don`t start from the same origin. So I reduced it to 8 pixels and this gives a better affect. You can also get away with a single byte add for tilt or use a table. And only 2 sprites to update (chex3) As before written using Bll, oh and `D` pad does minor stuff ☺️ chex2.o Chex2.asm chex3.o Chex3.asm greendots1.bmp greendots2.bmp

Just had a go at the Space Harrier type playfield. Using a large bitmap sprite. I was surprised how quick it was to do. This version uses one sprite. But probably better to cut it in half and mirror it. Also needs a line interrupt for the vertical moving colour change. Written using Bll assembler chex.o Chex.asm chex.bmp chex2.bmp

Thanks for the info guys, as I only want manipulate one byte in hpos and not add hoff offsets. My kludge was to move the action point to the center of the sprite this clips up to half the sprite whichever way it`s facing.

After seeing the excellent Playsoft conversion of "Biscuits in Hell" on the 8 bit. I thought I would see what it could look like on the lynx. I don`t remember if this has been said before but the lynx handles clipping differently on the left or right of the screen. With HOFF VOFF at zero if you move the player character left to the edge as soon as a part of the sprite goes off a pixel it disappears. But this does`nt happen on the right side it gets clipped. Also horizantally flipping the sprite causes it to be clipped on the left side too. (slightly strange but useful ☺️) biscuits.o

Just a suggestion try checking the ribbon cable. I had that problem and had to trim a couple of millimetres off of it. Just noticed this is for a lynx 1 mine was a lynx 2. But might be worth a look.

I see one major problem with a keyboard/computer option and I wonder why Atari did`nt see it either. That is at some point you would either randomly or by error write to the dma test bits and kill your machine.

Hi, quick search on my hard drive turned up Starship Command.... Don`t think I downloaded Cobra. Used to play Starship Command a lot on the BBC micro. Starshipcommand.zip

Hi all, just finished installing my Mcwill screen. Had a problem as I could`nt get 5 volts after removing the not needed components. This turned out to be a problem with the keypad ribbon cable. After trimming a couple of millimetres off the end as was described in another thread, all was fine. Really pleased with the result it`s amazing. Thanks Marco.

Bit late seeing this, had a rummage in an old ring binder. Amazing they had no 48k machine at launch but then look at the price! Interesting comparing this newsletter to the previously posted one.

Hi bugbiter, did you hand code the bitmap. If so I applaud your patience. When i did it I used Basic. harri1.atr To run it in Altirra. Boot as xl machine (it needs Graphics 15), load "d:jscope2.bas" On a side note why do file names have no meaning years later. Type gr.15:g.1000 That was 40 character mode. But we soon dropped that and went wide screen heheh. Type g.6000 for that. So we plotted half the screen copied it to $4000 then redrew the other half and copied that. Then dumped it to disk.