RAPIDUS for XL Computers

Description

Internal accelerator for 8bit ATARI XL series. 

• internal CPU turbo card for Atari 800 XL machines (dedicated adapter included),
• WDC 65C816 microprocessor operating at 20 MHz!!!
  
• managed by Xilinx Spartan6 FPGA and XC95XL CPLD devices,
• 1024kb of zero waitstate SRAM,
• up to 30.5MB of storage ram – SDRAM clocked at 160 MHz!!!
  
• 512kB of Flash memory (256kB is reserved for FPGA cores, 256kB for OS and New Device handler)
• 256b of EEPROM,
• high-speed bus connector for external I/O interfaces, DMA support,
• working modes, fully software controlled
• low power consumption due to DC/DC converters, no extra power supply required
• on-screen bios menu, accessible by pressing INV ( and hold) + RESET 

RAPIDUS UPGRADE may be very problematic with the ULTIMATE 1MB upgrade or VBXE.

Please, install it as a stand-alone upgrade on your computer. 

Files:

• Firmware upgrade manual
• Last firmware

Installation:

STEP ONE: CPU 

• if your CPU is NOT socketed, desolder it carefully, then solder in its place  “ADAPTUS 800XL 6502C SIDE” with bottom socket
• if your CPU is socketed, remove it from the socket carefully, insert  ” ADAPTUS 800XL 6502C SIDE” without bottom socket (original ATARI  sockets removal and usage of supplied precision ones along with supplied adapters STRONGLY SUGGESTED)

STEP TWO: OS ROM 

• if your ROM is NOT socketed, desolder it carefully, then solder in its place  “ADAPTUS 800XLRAPIDUS SIDE” with bottom socket
• if your ROM is socketed, remove it from the socket carefully, insert  “ADAPTUS 800XL RAPIDUS SIDE”  without bottom socket (original ATARI  sockets removal and usage of supplied precision ones along with supplied adapters STRONGLY SUGGESTED)

STEP THREE: CONNECTION, TEST

• Connect two adapters with supplied flat cable ( WARNING! PIN 1 must pin connected to PIN 1, etc..)
• Insert PROPERLY desoldered/removed CPU and ROM back into sockets at “ADAPTUS 800XL RAPIDUS SIDE”
• POWER ON  ATARI
• If ATARI doesn`t start – please check Your WORK ONCE AGAIN

STEP FOUR;

• Remove CPU from the socket and insert it to RAPIDUS
• Insert RAPIDUS into CPU SOCKET

STEP FIVE; make connections  to RAPIDUS plug:

• Power off Atari

for Atari 800XL without Freddy chip

• EXTSEL – 9 pin of 74ls08
• MPD  – 14 pin of MMU
• GND – example – pin 7 of 74ls08

for Atari 800XL with Freddy chip:

• GND – example – Freddie CHIP pin 20
• EXTSEL – Freddie pin 3
• MPD – MMU pin 14
• power ON ATARI