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Add aux memory field
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@ -124,6 +124,15 @@ typedef struct {
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*/
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vm_segment *ram2;
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/*
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* The Apple II may have an auxiliary RAM bank; this was possible by
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* installing a card there. If you had the 80-column text card (and
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* you likely did), then you got an extra kilobyte of RAM to work
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* with; it was either used for the extra columns or you could take
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* advantage of it for extra storage otherwise.
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*/
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vm_segment *aux;
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/*
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* The screen wherein we shall render all of our graphics.
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*/
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@ -39,6 +39,13 @@
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*/
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#define APPLE2_RAM2_SIZE 0x1000
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/*
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* At the highest point (with the IIe extended 80 column text card), you
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* could have a whole other 64k of data in auxiliary memory. (Of which
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* only 1k was needed for 80 columns!)
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*/
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#define APPLE2_AUX_SIZE 0x10000
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/*
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* This is the base address (or offset) for all bank-switched memory
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*/
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@ -67,8 +67,9 @@ apple2_create(int width, int height)
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// Initliaze our system ROM and separate bank-switched block of RAM
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mach->rom = vm_segment_create(APPLE2_ROM_SIZE);
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mach->ram2 = vm_segment_create(APPLE2_RAM2_SIZE);
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if (mach->rom == NULL || mach->ram2 == NULL) {
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log_critical("Could not initialize ROM / RAM2!");
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mach->aux = vm_segment_create(APPLE2_AUX_SIZE);
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if (mach->rom == NULL || mach->ram2 == NULL || mach->aux == NULL) {
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log_critical("Could not initialize ROM / RAM2 / AUX!");
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apple2_free(mach);
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return NULL;
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}
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