Merit Megatouch Classic Upright
History
The Classic Upright (and the Countertop) were the first touch-screen based machines released by Merit in 1993.
With a similar format to earlier button operated games, they were the only two of the three available formats for the generation that ran the "Pit Boss Supertouch 30" and "Pit Boss Megatouch" software releases as they were shipped with the CRT-250 hardware. The CRT-260 revision was also available for them, making them the only machines that were able to run all software releases available for the generation.
Hardware
| CPU | Zilog Z80B |
| Video | 2 x Yamaha V9938 Video Processor |
| Sound | Microchip AY8930 (or compatible) |
| Crystal Oscillator | 21.47727 MHz |
| IO | 2x Z80APIO (I/O and Interrupt Controllers
P825AA (I/O) |
| Memory | Fujitsu MB81464-12 |
Additional (optional) boards for the CRT-250:
- CRT-254: Connects to a Dallas DS1204 electronic key
- CRT-256: Stores question roms (aka Memory Expansion board)
- CRT-258: Microtouch touch screen controller
| CPU | Zilog Z80B |
| Video | 2 x Yamaha V9938 Video Processor |
| Sound | Microchip AY8930 (or compatible) |
| Crystal Oscillator | 21.47727 MHz |
| IO | 2x Z80APIO (I/O and Interrupt Controllers
P825AA (I/O) |
| Memory | Fujitsu MB81464-12 |
| SRAM | Dallas DS1225Y 64K NV-SRAM (Megatouch 4)
Dallas DS1230Y 256K NV-SRAM (Megatouch 6) Dallas DS1664 32K NVRAM + RTC (Tournament Editions) |
| UART | PIC16650 (for communication with touchscreen controller) |
| Electronic Key | Dallas DS1204 |
| Others | DS1232 (Reset / Watchdog)
MAX232 (for Megalink) Microtouch SMT-3 Touch Screen Controller |