Dream Turbo Card by pear

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Revision as of 18:20, 6 January 2018 by Pear (talk | contribs) (Memory map)

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Dream Turbo Card (design stage)

Brief information

Internal memory card and switched clock generators.

Specification

  • 1 MB SRAM, optionally 2 MB, in banks of 64KB,
  • 512 KB FlashROM, 8 banks of 64 KB with the option of individual switching off, EXOS in bank 7 (always on),
  • RTC clock,
  • NVRAM (battery backup),
  • two-channel synchronized clock signal generator:
    • system clock 4/8/12/16/20 MHz (2/4/6/8/10 MHz Z80 CPU),
    • EXDOS clock 8/9.6/10/12/13.33/16 MHz
  • LCD or OLED display (2x16 chars),
  • RGB LED to signal by colors the selected CPU clock:
    • 2MHz blue,
    • 4MHz green,
    • 6MHz yellow,
    • 8MHz orange,
    • 10MHz red,
  • optional temperature sensor for NICK,
  • configured by rotary encoder or by software.

Features

Status register

Config registers

Address Bits Content
NVRAM CPLD 7 6 5 4 3 2 1 0
0x7F 3 Memory mode EXDOS clock System clock Memory bank mode, selection of clocks (below)
0x7E 2 unused Flash.6 Flash.5 Flash.4 Flash.3 Flash.2 Flash.1 Flash.0 Disabling flash memory banks, bit N=1 Flash bank N disable
N/A 1 LCD bias LCD contrast
N/A 0 LCD backlight LED blue LED green LED red LCD backlight and RGB LED control

Memory map

MT is MICROTEAM card.

Mode 0 (default)
x0-x3 x4-x7 x8-xB xC-xF
0x Flash.7 CART EPNET EPNET
1x MT SRAM1 MT SRAM1 MT SRAM1 MT SRAM1
2x MT Flash MT Flash MT Flash MT Flash
3x MT SRAM2 MT SRAM2 MT SRAM2 MT SRAM2
4x MT DRAM1 MT DRAM1 MT DRAM1 MT DRAM1
5x MT DRAM2 MT DRAM2 MT DRAM2 MT DRAM2
6x Flash.0 Flash.1 Flash.2 Flash.3
7x Flash.4 Flash.5 Flash.6 RAM1.F
8x RAM2.0 RAM2.1 RAM2.2 RAM2.3
9x RAM2.4 RAM2.5 RAM2.6 RAM2.7
Ax RAM2.8 RAM2.9 RAM2.A RAM2.B
Bx RAM2.C RAM2.D RAM2.E RAM2.F
Cx RAM1.0 RAM1.1 RAM1.2 RAM1.3
Dx RAM1.4 RAM1.5 RAM1.6 RAM1.7
Ex RAM1.8 RAM1.9 RAM1.A RAM1.B
Fx RAM1.C RAM1.D RAM1.E VRAM

DTCMemMap.png

Clock selection

DS1 DS2 Work mode
ON ON EnterMice native mouse mode
OFF ON BoxSoft compatible mouse mode. The two main buttons are swapped. Main now is the right one.
OFF OFF EnterMice joystick mode (Movement made to the mouse is redirected to the input of Joystick 1, and that port is disabled)
ON OFF not used (in fact EnterMice as joystick on KB K column)

How to install

Links

Thread on the Enterprise Forever forum 6Mhz and more...