Post by f***@hotmail.comPost by qkumbaLots of Datasoft hit that one. As far as I remember, ROM1 can't do it properly, so I didn't add support for it. I can revisit that.
Yes. Goonies, Mr Do, and both Pacman versions (joystick calibration screen). Also, the lores intro animation in Pollywog uses page 2, as well as the text shown before Stellar 7 switches into hires mode.
Antoine, did setting Alt Display Mode the ROM1 also change the speed back to fast? I have a ROM3 now but seem to recall something different about ROM1. Reminded me of your comments how to properly set the speed and black background.
SETGS
LDA #$0F
TRB CLOCKDATA
LDA #$80
TRB CYAREG
RTS"
The code above will set the IIgs to 1 MHz.
TEXT2COPY info:
*
* Due to limited space, differentiation between Gyro
* and gs can't insert here, thus move TEXT2COPY to
* TEXT2COPYFF. Entry point must be maintained.
*
* This routine installs a heartbeat task
* that copies text page 2 to bank E0 for
* the Mega // to display on every VBL.
*
* This is a toggle (enable/disable) routine.
* If auto text copy is on, on entry, it is disabled on exit.
* If auto text copy is off, on entry, it is enabled on exit.
*
and
*
* This routine installs a heartbeat task
* that copies text page 2 to bank E0 for
* the Mega // to display on every VBL.
*
* This is a toggle (enable/disable) routine.
* If auto text copy is on, on entry, it is disabled on exit.
* If auto text copy is off, on entry, it is enabled on exit.
*
* For Gyro, no heart beat task is required.
* Toggle hardware bit5 of shadow register, $c035
* is equivalent to software copying.
*
* This routine can be invoked from Classic Desk Accessory
* or mainside entry point $f962. In the case of CDA, an
* interrupt occurred and the enviroments are stored and restored
* during in and out of the CDA, this includes store and restore of
* SHADOW reg, therefore it is necessay to update IRQ_SHADOW to
* reflect the most current states of shadowing. When exits, then
* restoring of SHADOW reg from IRQ_SHADOW would show the users'
* preference states.
and
* A routine to set text page2 shadowing register ($c035, bit5)
* probably for original //gs and new machine
* For gs, when exit 'c'=0 else 'c'=1
; SEG $FF
SETTEXT2REG EQU *
; SEG $00
PHB ; Save data bank
JSR DBTOE1 ;Set to $e1 bank
LDA |KEYUCVER ;Get keyucver #
CMP #$06 ;If > $06, then using new CYA chip
BCC @2 ;Bra if not, old FPI chip
LDA |TP2MODE ;Chk for already on/off
BNE @2 ;Bra if already off
LDA #$20 ;Else it is on, need to turn off
TSB SHADOW ;Set off
BRA @3 ;Bra to end
@2 EQU *
LDA #$20 ;Previous on is off, set on now
TRB SHADOW ;Set on, no effect for gs board
@3 PLB ;Restore data bank
RTS ;Return to caller
To answer your question: I do not know but it is possible that the "original" speed be restored. If so, code can be written as:
CLOCKDATA = $c034
CYAREG = $c036
TEXT2COPY = $f962
IDROUTINE = $fe1f
SEC
JSR IDROUTINE
BCS notIIgs
JSR TEXT2COPY
LDA #$0f
TRB CLOCKDATA
LDA #$80
TRB CYAREG
notIIgs ...