Atari ST: First impressions

A few months ago I got an Atari 1040 STF. I knew nothing about it when I got it, except that it was a similar to the Amiga.

Atari 1040 STF

The Atari ST, the Amiga and the Macintosh were computers released in the mid 80’s, all of them based on the Motorola 68k, and all of them came with a windows-based GUI.  This was a revolutionary step compared to the 8-bit machines which were CLI text-driven.

The base “ST” model includes:

  • 8 Mhz Motorola 68000 CPU
  • Yamaha YM2149 3-voice square-wave plus 1-voice white noise (mono)
  • 512Kb or 1Mb RAM (520 vs 1040 models)
  • 3 video modes:
    • 320 x 200 x 16 colors (from a 512 color palette).
    • 640 x 200 x 4 colors (from a 512 color palette)
    • 640 x 400 x 2 colors (I believe this is only B/W)
  • Midi In / Out: Apparently a killer feature for musicians.

Compared with the 8-bit home computers like the C64/C128, the Atari ST is a good improvement. From only 64K/128K RAM to 512K (or 1024K) RAM, an 8 Mhz CPU (vs. 1 or 2 Mhz) and Midi. But there are no hardware sprites (no blitter), and the music is chiptune, like in the C64. The C64 SID chip might be even better. The video modes are OKish. Having a 320×200 @ 16 colors from a palette of 512 is nice, but not that impressive. It is worth noting that the Atari ST (like the Amiga and the Macintosh) don’t have “text video modes”, they only have “graphic” ones.

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64K RAM Ought to be Enough: a demo for the PCjr

Updated 2018–10–08

A demo for the IBM PCjr by Pungas de Villa Martelli. It was presented at Flashparty 2018 and won the Demo category.

Requirements

An IBM PCjr with at least 64k RAM.

Download

Technical description

The demo is divided in the boot loader and demo 3 parts

Boot loader

Boot loader
Boot loader

The demo is intended to work with a 64K RAM (or more) PCjr. Booting from its own boot loader is needed to save precious memory. DOS alone takes ~20K of RAM. That is 30% of the total memory. You don’t want to waste that memory.

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Cromemco System 3 computer

The Cromemco System Three is a Z-80 based computer. Which is nice, because I always wanted to learn Z-80 (this is my second Z-80 computer, the other one is a MSX2).

But What I like about the Cromemco is how well-built it is. I love it.

The computer is that not big, but it is a very heavy computer.

At the moment I don’t have the needed cables to test it. If I can’t find them, I might be able to build them myself (or not). If manage to get the cables, and provided that the computer works, I promise to write a game or something for it 🙂

Photos:

Cromemco System Three

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Tandy 64, and intro for the Tandy 1000 and more

With PVM with released an intro for the Tandy 1000 HX.

The Tandy 1000 HX uses the Intel 8088-2 CPU. Which is a suuuuper slow CPU (slower than the 8086). With all its wait states and its limitations on the video card (no hardware sprites, no charset redefinition) it makes it comparable with a Commodore 64. In fact, for certain things a Commodore 64 if way faster.

Without further ado, this is the Tandy intro:

Source code here: https://github.com/c64scene-ar/tandy64

And we’ve just released another chipdisk, this time with Brazilian music:

Source code: https://github.com/c64scene-ar/chipdisk-brazil_bits

 

Commodore 64 Assembly Tutorial – Part II

A few months ago we (Pungas de Villa Martelli) released the 4Kindness, a 4K intro for Silesia Party 8. And recently we released its source and a tutorial detailing how we built it.

Without further ado, here it is:

If you have doubts/questions about it, let us know!

Actualizo: Ya no se que es lo que quiere Dios

Me encuentro confundido, perdido espiritualmente.

Pensé que Dios me estaba dando mensajes claros y simples, para que una persona como yo los entienda sin ambigüedad alguna, mensajes claros como:

  • “Hacé el UniJoystiCle para la PET. No pierdas tiempo en la Plus/4”.

Pero hoy el vecino me entregó un paquete… ¿qué paquete?
El paquete con la Commodore Plus/4 que yo pensé que algún ladronzuelo se había apoderado (yo el mal pensado, perdón ladronzuelo que no fuiste)

Lo primero que hice es agradecer al vecino. Claro esta.

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Dios las prefiere PETs

Volví de viaje. Llego a casa con ansias de encontrarme con la Commodore Plus/4 que había pedido por Ebay. El email decía que la habían dejado en la puerta de casa el viernes a las 3:54pm. Yo llegué a casa el sábado a las 11:58am.

La busqué pero no la encontré. Ni en la puerta de casa. Ni en ningún lado.

(Vaya sorpresa se habrá llevado el ladronzuelo al abrir la caja).

Una tristeza enorme se apoderó de mi.

Para ahogar mis penas me fui al Vintage Computer Festival. Fui a escuchar la charla de Commodore. Iban a estar Bil Herd, Leonard Tramiel, Chuck Peddle y demás commodorianos de la época 8-bit.

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