|-
|#FA7E||%xxxxx0x0 0xxxxxxx||Floppy Motor Control (for [[765 FDC]])|| - ||Write
|-
|#FABC||%xxxxx0x0 10xxxx00||Aleste EXTPORT with CS53: Forward PPI Port A to 8253 Timer 0|| - ||Write
|-
|#FABD||%xxxxx0x0 10xxxx01||Aleste EXTPORT with CS53: Forward PPI Port A to 8253 Timer 1|| - ||Write
|-
|#FABE||%xxxxx0x0 10xxxx10||Aleste EXTPORT with CS53: Forward PPI Port A to 8253 Timer 2|| - ||Write
|-
|#FABF||%xxxxx0x0 10xxxx11||Aleste EXTPORT with CS53: Forward PPI Port A to 8253 Control|| - ||Write
|-
|#FABF||%xxxxx0x0 10xxxxxx||Aleste EXTPORT|| - ||Write
* 1 = Reserved (would access both PSG and 8253 together)
* 2 = RTC (Real-Time Clock) (With PPI.Port C: Bit2=DS, Bit1=AS, Bit0=R/W. So combinations are 2, write address, 4 write data, 5 read data)
* 3 = 8254 8253 (Baudrate/Future Timer) (With address lines A0 and A1 = register selection)
|-
|3||force video to black
|''bit''||Action
|-
|7||01
|-
|6||10
|-
|5||CAPS LED
07h AMSDOS (bytes in 8000h..BFFFh in the Aleste's 64K EPROM)
All other values 01h..02h, 04h..06h, 08h..FFh do select BASIC, too.
The BOOTMENU is an aleste specific ROM bank. BASIC and AMSDOS are 1:1 same as in CPC6128. The BIOS (lower ROM bank) is almost same as in CPC6128 (only the Startup Message and Printer handling are modified). For details, see:
* [[Media:AlesteBiosDisassembly.txt]] - Disassembly of differences between CPC6128 and Aleste BIOS
* [[Media:AlesteBootmenuRomBank3.asm]] - Original source code for BOOTMENU (Upper ROM Bank 3)
== PPI 8255 ==
The built-in RS232 port can be used to connect a serial mouse.
* See [[Serial RS232 Mouse]] for details on the protocol
[[Category:Non CPC Computers]][[Category:Clones]]