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EP994A - TI99/4A clone

Cart loading

Cartridges can have .g (GROM), .c and .d parts. They could be auto-detected from the file extension, or you must choose the appropriate menu item to load the correct type, if the extension is .bin.

If there's a .d part, load it last!

Keyboard mapping

Keyboard TI99/4A
Caps Lock Alpha Lock
Left Alt FCTN
Up FCTN + E
Down FCTN + X
Left FCTN + S
Right FCTN + D
Del FCTN + 1
Ins FCTN + 2
Esc FCTN + 9 (Back)

Disk support

The PHP1240 disk controller card is implemented in the core, which has a WD1771 FM-only FDC (single density).

The supported image format is v9t9 (sector dump). These images usually have the .DSK extension.

Only single-density images are supported at the moment (40 tracks/side, 9 sector/track), either single-sided or double-sided.

Basic usage of the disk system from BASIC:

  • SAVE DSK1.PRG - saves the current BASIC program to Drive 1 as PRG
  • OLD DSK1.PRG - loads the program from Drive 1

Credits

Original code by Speccery (https://github.com/Speccery/EP994A)
Enhancements and bug fixes by greyrogue
MiST port by György Szombathelyi

VDP & PSG from FPGA Colecovision
Copyright (c) 2006, Arnim Laeuger (arnim.laeuger@gmx.net)

Source code:

https://github.com/gyurco/colecovision_fpga/