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Ice 128 V0.1 (ROM modification) [2018] |
| User rating: | awaiting 8 votes (8 left) |
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Summary
Submitted by XmikeX on 29 October 2018
Clarification needed .. under normal conditons @ C128, bank1 mmu config should not be assumed to make available all of ramblock 1 (the 'alternate' 64k ramblock). .. in fact, a quicker way to do this 'freezer' is to ignore stuff under $0400 - it's less code then, as follows:
LDA #$40
STA $FF00 :bank 15 with RAM Blocl 1
ORA $D506 :VIC/REU use RAM Block 1
STA $D506 :keep 1ki Common RAM at bottom
JMP $FF4D :KERNAL go 64 |
Summary
Submitted by XmikeX on 29 October 2018
Ice.128 v0.1 (ROM modifications) by XmikeX - 28 October 2018
Using your C128 as a Poor Man's 64mode Freezer Cartridge!
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* Requirements: replace basiclo and kernal ROMS (emu or real 128) with filedata provided in Ice.128.v01.zip
Use the new ICE Command in BASIC, type "Y" or "YES" at GO ICE64? prompt.
In 64mode, load up your 64-side stuff then use reset button to return to 128 mode.
Use C128 and its ML Monitor to inspect 64-side now residing in the second 64k ram block (bank1).
Do not confuse this 64k ram bank with "Bank 1" MMU configuration setting.
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