Gepostet vor 2 Jahren, 4 Monaten in
Der Gewinner der Revision 2015 Demoparty in Saarbrücken, 8088 MPH von Hornet + CRTC + DESiRE auf einem 8088-CPU in einem IBM5150 (dem ersten „IBM PC“). What kind of sorcery is this?
- 4.77 MHz 8088 CPU. 5 MHz seems like a lot compared to other 8-bit micros, but it takes the CPU 4 cycles to read a single byte. So, compared to other 8-bit CPUs like the 6502, 6809, or Z80 which can read a byte in one clock cycle, the effective clock speed of the 8088 is more like (4.77 / 4) = 1.19 MHz.
- Video adapter that has a 9-pin RGBI interface and an RCA NTSC composite video interface.
- Driven by a Motorola 6845 character generator. No facilities for changing text characters; font is fixed.
- Internal speaker; no sound card like the Sound Blaster, or special sound hardware like the C64 SID. Speaker can be driven by a timer pin to produce a square wave, or can be bit-banged directly via a port or a one-shot timer.