Differences
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mg_notes:general:mem_map [2017/10/12 14:15] M.G. [Main RAM / IIgs Bank 0] |
mg_notes:general:mem_map [2017/10/12 14:21] (current) M.G. [Main RAM / IIgs Bank 0] |
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| ===== Main RAM / IIgs Bank 0 ===== | ===== Main RAM / IIgs Bank 0 ===== | ||
| - | The IIgs supports shadowing of the Bank 0 screen buffers to bank $E0 Mega II "Slow RAM". | + | The IIgs screen buffers listed are not where the hardware actually draws them from. The real screen buffers are in Mega II "Slow RAM" bank $E0 and $E1. The IIgs hardware supports shadowing of the Bank 0 screen buffers to bank $E0. |
| ^ Address(es) ^ Use ^ | ^ Address(es) ^ Use ^ | ||
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| | 0800--09FF | Boot firmware loads block 0 here | | | 0800--09FF | Boot firmware loads block 0 here | | ||
| | 0800--0CFF | Text screen 2 | | | 0800--0CFF | Text screen 2 | | ||
| - | | 1000--.... | ProDOS 8 loads ATINIT here | | + | | 1000--.... | ProDOS 8 loads ATINIT here (ATINIT size must not stomp on the ProDOS init code) | |
| | 1000--12FF | ProDOS 8 copies QUIT code here and jumps to it | | | 1000--12FF | ProDOS 8 copies QUIT code here and jumps to it | | ||
| - | | 2000--.... | ProDOS 8 system programs load here | | + | | 2000--BEFF | ProDOS 8 system programs load here | |
| | 2000--4000 | HGR page 1 | | | 2000--4000 | HGR page 1 | | ||
| | 4000--6000 | HGR page 2 | | | 4000--6000 | HGR page 2 | | ||
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| ===== Aux RAM / IIgs Bank 1 ===== | ===== Aux RAM / IIgs Bank 1 ===== | ||
| - | The IIgs supports shadowing of the Bank 1 screen buffers to bank $E1 Mega II "Slow RAM". | + | The IIgs screen buffers listed are not where the hardware actually draws them from. The real screen buffers are in Mega II "Slow RAM" bank $E0 and $E1. The IIgs hardware supports shadowing of the Bank 1 screen buffers to bank $E1. |
| | 0000--00FF | Aux Zero Page | | | 0000--00FF | Aux Zero Page | | ||