2 replies to this topic

[Wookie]

Assuming the the only initialization of the Lynx is as follows:

    // 1. force Mikey to be in memory
    lda #0
    sta MIKEY_MEMORY_MAP_CONTROL

    // 2. set IODIR the way Mikey ROM does, also force AUDIN to output
    lda #010011    
    sta MIKEY_IO_DIRECTION

    // 3. set ComLynx to open collector
    lda #000100
    sta MIKEY_SERIAL_CONTROL

    // 4. make sure the ROM is powered on
    lda #001000
    sta MIKEY_IO_DATA

What would be the minimum amount of assembly to init suzy and display, full screen, a sprite located at 0x0500? I'm trying to add a simple splash screen to my secondary loader so that something gets on the screen ASAP. I thought I'd ask you guys since you're all pretty good at this stuff.

(BTW, I could figure this out for myself, but I wanted to see if anybody had a clever way to do this in a minimal amount of code.)

--Wookie

Edited by Wookie, Mon Jan 17, 2011 3:14 PM.

[sage]

Wookie, on Mon Jan 17, 2011 3:13 PM, said:

Assuming the the only initialization of the Lynx is as follows:

    // 1. force Mikey to be in memory
    lda #0
    sta MIKEY_MEMORY_MAP_CONTROL

    // 2. set IODIR the way Mikey ROM does, also force AUDIN to output
    lda #010011    
    sta MIKEY_IO_DIRECTION

    // 3. set ComLynx to open collector
    lda #000100
    sta MIKEY_SERIAL_CONTROL

    // 4. make sure the ROM is powered on
    lda #001000
    sta MIKEY_IO_DATA

What would be the minimum amount of assembly to init suzy and display, full screen, a sprite located at 0x0500? I'm trying to add a simple splash screen to my secondary loader so that something gets on the screen ASAP. I thought I'd ask you guys since you're all pretty good at this stuff.

(BTW, I could figure this out for myself, but I wanted to see if anybody had a clever way to do this in a minimal amount of code.)

--Wookie

-> maybe check the EPYX loader code?
Then you are sure it is working

[LX.NET]

Wookie, on Mon Jan 17, 2011 3:13 PM, said:

Assuming the the only initialization of the Lynx is as follows:

    // 1. force Mikey to be in memory
    lda #0
    sta MIKEY_MEMORY_MAP_CONTROL

    // 2. set IODIR the way Mikey ROM does, also force AUDIN to output
    lda #010011    
    sta MIKEY_IO_DIRECTION

    // 3. set ComLynx to open collector
    lda #000100
    sta MIKEY_SERIAL_CONTROL

    // 4. make sure the ROM is powered on
    lda #001000
    sta MIKEY_IO_DATA

What would be the minimum amount of assembly to init suzy and display, full screen, a sprite located at 0x0500? I'm trying to add a simple splash screen to my secondary loader so that something gets on the screen ASAP. I thought I'd ask you guys since you're all pretty good at this stuff.

(BTW, I could figure this out for myself, but I wanted to see if anybody had a clever way to do this in a minimal amount of code.)

--Wookie

Although I have no actual Lynx programming experience I do know that the Epyx Handy documentation has a set of required steps you need to follow to ensure correct initialization for drawing sprites:
Sprite Initialization