Trying Out The 8088MPH Demo On The MiSTer FPGA PCXT Core

#8088MPH #MiSterFPGA #PCXT

The PCXT core on the MiSTer FPGA is still a work in progress, it focuses on the first generations of PC compatibles with 8088 CGA/MDA/Tandy1000 & OPL2/Adlib on the market and serves a different purpose than the OA486 PC implementation with 486-SX90 sVGA & Soundblaster.

Topic of this video is
8088 MPH: We Break All Your Emulators by Hornet + CRTC + DESIRE
It truly is the stuff of legends, it shows the PCXT in a glory that it has not shown before as it could actually compete with the C64 – albeit a few years late 😁😎

Targeted hardware for the demo is the grand-daddy of all modern PCs the A 1981 IBM 5150
HARDWARE:
CPU: 4.77 MHz 8088 CPU. (the Intel CPU takes 4 cycles to read a single byte compared to 1 cycle to read a byte for CPU’s like the 6502 in the C64)
VIDEO: CGA including an RCA NTSC composite video interface with fixed characterset.
SOUND: Internal speaker; single voice squarewave beeper or on/of bitbanging unlike the 3 voice C64 SID chip

As you can imagine the demo doesn’t run perfectly, but a lot of it is quite watchable on this work in progress PCXT Core:
– the 256 colour plasma doesn’t show all the colours
– the Fefrens bar effect is severely corrupted doesn’t even look like anything
– the 6 portraits are missing colours

Perhaps a good gage for determining the completeness of the PCXT FPGA core is measuring how capable it is at reproducing the 8088MPH Demo at 100%. There still is a ways to go. But it is good to see it running!

Cheers and thanks for watching – LactobacillusPrime (aka Mark V.)

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