This even can sincronize both real Z80(3,58Mhz) and the Z80/R800 emulator on MSX-ARM, so one can load cassete(Z80 cycle must be accurate) data running the Z80/R800 on ARM! I've tested all this "Z80 zombie mode" tecniques on MSX-ARM prototype and on my MSX-ARM simulator software development kit ( AKA Konami HP64000). All data transfers to real peripherals like VDP,PPPI generates Z80 opcodes(real time) on MSX host(Z80/R800 zombie mode). In my MSX-ARM architecture the ARM processor ONLY emulates the Z80/R800 processor. This techinique can be spreaded even more. Doing this way using optimizations we can achieve high transfer rate(very close as Z80 DMA). The external processor (for example the ARM on MSX-ARM architecture or the MSX FPU processor) generates the MSX Z80/R800 instructions on the fly. Thinking in the other way don't work.Thinking in the conventional way we learned on books(The processor run IO instruction as a master) don't work too. To fully understand the possibilities one must think as a software and hardware tecnique bonded together. DOT) way of thinking,very simple like the Colombo egg. In fact I've explained this tecnique several times in this forum.This technique is a out of box(The box is: MSX cannot do bus request, so an external processor cannot be the master processor. Zombie mode ? how can you avoid electrical conflicts since there is no suitable BUSREQ line on msx?Īs far i know, no high impedance state no way to do DMA operations.? The FPU unit could do high performance data transfer directly to the VDP/V9990 using my "Z80/R800 zombie mode" technique too, minimizing the performance bottleneck between them. I think this device could use my "Z80/R800 zombie mode" techniques to improve the data tranfer rate between the FPU unit and the Z80/R800.
Particularly combined with a V9990, this opens a whole world of new possibilities for MSX.
According to TecnoBytes, using the MSX FPU should make it possible to do realtime calculations for a game that uses "Angry Birds" physics. To make that happen, they have teamed up with the team behind the Oldbits Dev Studio who are going to produce a ready-for-use library to support the MSX FPU. Today, TecnoBytes have announced an upcoming hardware extension for MSX that brings something entirely new to the table: a Floating Point Unit (FPU) for MSX or in other words: a coprocessor that can take the performance of your MSX to the next level, provided there is software written for it. These cards are compatible with the Sunrise MoonSound and GFX9000 cartridges respectively. Over the past few years Brasil based TecnoBytes have rapidly grown a good reputation as hardware supplier for MSX, with their OPL4 Shockwave sound card and the V9990 PowerGraph as the most well-known products.
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